<SEC-DOCUMENT>0001144204-18-016886.txt : 20180326
<SEC-HEADER>0001144204-18-016886.hdr.sgml : 20180326
<ACCEPTANCE-DATETIME>20180326160152
ACCESSION NUMBER:		0001144204-18-016886
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20180321
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20180326
DATE AS OF CHANGE:		20180326

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Limbach Holdings, Inc.
		CENTRAL INDEX KEY:			0001606163
		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION SPECIAL TRADE CONTRACTORS [1700]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36541
		FILM NUMBER:		18712768

	BUSINESS ADDRESS:	
		STREET 1:		31 35TH STREET
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15201
		BUSINESS PHONE:		(412) 359-2100

	MAIL ADDRESS:	
		STREET 1:		31 35TH STREET
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	1347 Capital Corp
		DATE OF NAME CHANGE:	20140422
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>tv489524_8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 12pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CURRENT REPORT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PURSUANT TO SECTION 13 OR 15(d) OF THE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Date of Report (Date of earliest event reported):
<B>March 21, 2018</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>LIMBACH HOLDINGS, INC.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in
its charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 33%; padding-right: 3pt; padding-left: 3pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="width: 34%; padding-right: 3pt; padding-left: 3pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>001-36541</B></FONT></TD>
    <TD STYLE="width: 33%; padding-right: 3pt; padding-left: 3pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>46-5399422</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 3pt; padding-left: 3pt; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(State or other jurisdiction of</FONT></P>
                                                                          <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">incorporation)</FONT></P></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Commission File Number)</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(IRS Employer Identification No.)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>31 &ndash; 35th Street, Pittsburgh, Pennsylvania
15201</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Address of principal executive offices,
including zip code)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Registrant&rsquo;s telephone number, including
area code: <B>(412) 359-2100</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Not Applicable</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Former name or former address, if changed
since last report)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Check the appropriate box below if the Form
8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="width: 94%; padding-right: 3pt; padding-left: 3pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 5.25pt; text-indent: 30.9pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="width: 94%; padding-right: 3pt; padding-left: 3pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 5.25pt; text-indent: 30.9pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="width: 94%; padding-right: 3pt; padding-left: 3pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 5.25pt; text-indent: 30.9pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="width: 94%; padding-right: 3pt; padding-left: 3pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Indicate by check mark whether the registrant is an emerging
growth company as defined in Rule 405 of the Securities Act of 1933 (&sect;230.405 of this chapter) or Rule 12b-2 of the Securities
Exchange Act of 1934 (&sect;240.12b-2 of this chapter).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">Emerging
growth company </FONT><FONT STYLE="font-family: Wingdings">x</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for
complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. </FONT><FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 3pt; margin-bottom: 12pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; border-bottom: Black 2pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in; padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 1.01.</B></FONT></TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Entry into a Material Definitive Agreement.</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On March 21, 2018, Limbach Holdings, Inc.
(the &ldquo;Company&rdquo;), Limbach Facility Services LLC (&ldquo;Borrower&rdquo;), Limbach Holdings LLC (&ldquo;Parent&rdquo;),
Limbach Company LLC (&ldquo;Limbach Company&rdquo;), Limbach Company LP (&ldquo;Limbach LP&rdquo;), Harper Limbach LLC (&ldquo;Harper&rdquo;)
and Harper Limbach Construction LLC (&ldquo;Construction&rdquo; and together with Parent, Limbach Company, Limbach LP and Harper,
the &ldquo;Initial Guarantors&rdquo;) entered into a Third Amendment to the Credit Agreement (the &ldquo;Amendment&rdquo;) with
Fifth Third Bank (&ldquo;Fifth Third&rdquo;), as Administrative Agent and L/C Issuer and the other Lenders party thereto. The Amendment
amends that certain Credit Agreement entered into between the Borrower, the Initial Guarantors and Fifth Third on July 26, 2016
(as amended, the &ldquo;Credit Agreement&rdquo;), to, among other things, (i) increase the amount that may be drawn against the
revolving credit facility for the issuances of letters of credit from $5.0 million to $8.0 million; (ii) modify the definition
of EBITDA to include certain one-time costs and non-cash charges; and (iii) join the Company as a guarantor under the Credit Agreement
and related loan documents. Capitalized terms used but not defined herein have the meanings ascribed to them in the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In connection with the Amendment, the Company
entered into an Assumption and Supplement to Security Agreement with Fifth Third on March 21, 2018 (the &ldquo;Assumption and Supplement&rdquo;).
The Assumption and Supplement supplements that certain Security Agreement (the &ldquo;Security Agreement&rdquo;) dated as of July
26, 2016, executed by the Borrower and the other parties thereto in favor of Fifth Third. Pursuant to the Assumption and Supplement,
the Company became a Debtor (as defined in the Security Agreement) party to the Security Agreement and granted a lien on certain
of its assets as described therein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The foregoing description of the Amendment
and the Assumption and Supplement does not purport to be complete and is qualified in its entirety by reference to the Amendment
and the Assumption and Supplement, copies of which are attached hereto as Exhibits 10.1 and 10.2 to this Current Report on Form
8-K and are incorporated by reference herein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in; padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 2.03 </B></FONT></TD>
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The disclosure under Item 1.01 of this Current
Report on Form 8-K is incorporated by reference into this Item 2.03.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in; padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 9.01</B></FONT></TD>
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Financial Statements and Exhibits.</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 1%; padding-right: 3pt; padding-left: 3pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(d)</FONT></TD>
    <TD STYLE="width: 96%; padding-right: 3pt; padding-left: 3pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Exhibits</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; padding: 0; text-align: justify; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><B>Exhibit</B></FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>No.</B></FONT></P></TD>
    <TD STYLE="width: 89%; border-bottom: black 1pt solid; padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><B>Description</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="color: Black">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><U><A HREF="tv489524_ex10-1.htm" STYLE="-sec-extract: exhibit">10.1</A></U></FONT></TD>
    <TD STYLE="padding: 0; text-align: justify; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><U><A HREF="tv489524_ex10-1.htm" STYLE="-sec-extract: exhibit">Third
    Amendment to Credit Agreement, dated March 21, 2018, by and among Limbach Holdings, Inc., Limbach Facility Services LLC, Limbach
    Holdings LLC, the other Guarantors party thereto, the Lenders party thereto and Fifth Third Bank, as Administrative Agent
    and L/C Issuer.</A></U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="color: Black">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><U><A HREF="tv489524_ex10-2.htm" STYLE="-sec-extract: exhibit">10.2</A></U></FONT></TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Black"><U><A HREF="tv489524_ex10-2.htm" STYLE="-sec-extract: exhibit">Assumption
    and Supplement to Security Agreement, dated March 21, 2018, by and between Limbach Holdings, Inc. and Fifth Third Bank, as
    Administrative Agent.</A></U></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Pursuant to the requirements
of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned
hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>LIMBACH HOLDINGS, INC.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 3%; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 47%; padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By: </FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ John T. Jordan, Jr.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Name: John T. Jordan, Jr.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Title: Chief Financial Officer</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated: March 26, 2018</FONT></TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>



<P STYLE="margin: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 3; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>tv489524_ex10-1.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0; text-align: right"><B>Exhibit 10.1</B></P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Third Amendment to Credit
Agreement</P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">This Third Amendment
to Credit Agreement (herein, this <I>&ldquo;Amendment&rdquo;</I>) is entered into as of March 21, 2018, by and among <FONT STYLE="font-variant: small-caps">Limbach
Facility Services LLC</FONT>, a Delaware limited liability company (the <I>&ldquo;Borrower&rdquo;</I>), <FONT STYLE="font-variant: small-caps">Limbach
Holdings LLC</FONT>, a Delaware limited liability company (the <I>&ldquo;Parent&rdquo;</I>), <FONT STYLE="font-variant: small-caps">Limbach
Holdings, Inc.</FONT>, a Delaware corporation (<I>&ldquo;Limbach, Inc.&rdquo;</I>), the other Guarantors party hereto, the Lenders
party hereto, and <FONT STYLE="font-variant: small-caps">Fifth Third Bank</FONT>, an Ohio banking corporation, as Administrative
Agent and L/C Issuer.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Recitals</B></FONT><B>:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 12pt">A.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Borrower, the Parent, the
other Guarantors party thereto, the Lenders party thereto, and the Administrative Agent are party to a Credit Agreement dated as
of July&nbsp;20,&nbsp;2016 (as amended, modified, restated, or supplemented from time to time, the <I>&ldquo;Credit Agreement&rdquo;</I>).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 12pt">B.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Borrower,
the Lenders and the Administrative Agent have agreed to join Limbach, Inc. as a Guarantor to the Credit Agreement, and to make
certain amendments to the Credit Agreement in connection therewith, in each case, pursuant to the terms and conditions set forth
herein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 12pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">Now,
Therefore</FONT>, for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties
hereto agree as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section 1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Incorporation
of Recitals; Defined Terms.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The Borrower and the
Guarantors acknowledge that the Recitals set forth above are true and correct. This Amendment shall constitute a Loan Document,
and the Recitals shall be construed as part of this Amendment. Each capitalized term used but not otherwise defined herein, including
capitalized terms used in the introductory paragraph hereof and the Recitals, has the meaning assigned to it in the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section&nbsp;2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Amendments
to Credit Agreement.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Upon satisfaction of
the conditions precedent set forth in Section&nbsp;3 hereof, the Credit Agreement shall be and hereby is amended as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
definition of <I>&ldquo;Applicable Margin&rdquo;</I>, <I>&ldquo;Fixed Charge Coverage Ratio&rdquo;</I>, <I>&ldquo;Interest Expense&rdquo;</I>,
<I>&ldquo;Net Income&rdquo;</I>, <I>&ldquo;Senior Leverage Ratio&rdquo;</I>, <I>&ldquo;Subordinated Debt&rdquo;</I>, <I>&ldquo;Tangible
Net Worth&rdquo;</I>, and <I>&ldquo;Total Funded Debt&rdquo;</I> appearing in Section 1.1 of the Credit Agreement are each amended
by replacing the reference to <I>&ldquo;the Parent&rdquo;</I> in each place it appears therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center"> <!-- Field: Sequence; Type: Arabic; Name: PageNo; Options: Hidden -->&nbsp;<!-- Field: /Sequence --> </TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
following definitions appearing in Section 1.1 of the Credit Agreement are amended and restated in their entireties to read as
follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;EBITDA&rdquo;</I>
means, with reference to any period, Net Income for such period <I>plus</I>, without duplication, the sum of all amounts deducted
in arriving at such Net Income amount in respect of (a)&nbsp;Interest Expense for such period, (b)&nbsp;federal, state, and local
income taxes for such period, (c)&nbsp;depreciation of fixed assets and amortization of intangible assets for such period, (d)
transaction expenses incurred during such period in connection with Permitted Acquisitions, whether or not consummated, not to
exceed $50,000 in the aggregate during such period, (e) non-recurring, one-time costs and expenses approved by the Administrative
Agent in its sole discretion in an aggregate amount not to exceed $250,000 during such period, (f) losses or other charges related
to Legacy Claims during such period in an amount not to exceed $500,000 during such period and in an aggregate amount not to exceed
$2,500,000 during the term of this Agreement, and (g) non-cash charges, including stock based compensation expenses, incurred during
such period, <I>minus </I>all amounts included in arriving at such Net Income in respect of non-cash gains realized during such
period.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;Excess
Cash Flow&rdquo; </I>means, with respect to any period, the amount (if any) by which (a) EBITDA (without giving effect to any <I>pro
forma </I>adjustments made pursuant to the definition of Net Income) during such period exceeds (b) the sum (without duplication)
of (i) the aggregate amount of payments (including voluntary prepayments of the Term Loans) actually made by Limbach, Inc. and
its Subsidiaries during such period in respect of all principal on all Indebtedness (whether at maturity, as a result of mandatory
sinking fund redemption, mandatory prepayment, acceleration or otherwise, but excluding payments made on the Revolving Credit),
<I>plus </I>(ii) the aggregate amount of Capital Expenditures made by Limbach, Inc. and its Subsidiaries during such period and
not financed with proceeds of Indebtedness (but excluding credit extended under the Revolving Credit), <I>plus </I>(iii) the aggregate
amount of all federal, state and local taxes paid in cash with respect to such period, <I>plus </I>(iv) the aggregate amount of
Interest Expense for such period paid in cash, <I>plus </I>(v) the cash portion of any Restricted Payments made pursuant to Section
6.15(b) or 6.15(c), <I>plus </I>(vi) the cash portion of any Legacy Claims during such period in an aggregate amount not to exceed
$500,000 during such period and in an aggregate amount not to exceed $2,500,000 during the term of this Agreement, <I>plus </I>(vii)
transaction expenses paid in cash during such period in connection with Permitted Acquisitions, whether or not consummated, not
to exceed $50,000 in the aggregate during such period.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;Fixed
Charges&rdquo; </I>means, with reference to any period, the sum of (a) all scheduled payments of principal made or to be made during
such period with respect to Indebtedness (for clarity, excluding mandatory prepayments pursuant to Section 2.8(b)(v)) (<I>&ldquo;Principal
Payments&rdquo;</I>) of Limbach, Inc. and its Subsidiaries, <I>plus </I>(b) the cash portion of any Interest Expense for such period,
<I>plus </I>(c) Restricted Payments made by Limbach, Inc. and its Subsidiaries during such period pursuant to Section 6.15(b),
<I>plus </I>(d) without duplication, federal, state, and local income taxes paid in cash by Limbach, Inc. and its Subsidiaries
during such period.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;Guarantors&rdquo;
</I>means and includes Limbach, Inc., the Parent, each direct and indirect Subsidiary of the Borrower, and the Borrower, in its
capacity as a guarantor of the Secured Obligations of another Loan Party.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;L/C
Sublimit&rdquo;</I> means $8,000,000, as reduced pursuant to the terms hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section
1.1 of the Credit Agreement is amended to add the following new defined term in its appropriate alphabetical position to read in
its entirety as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>&ldquo;Third
Amendment Effective Date&rdquo;</I> means March 21, 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(b)(v) of Section 2.8 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(v)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On
or before May&nbsp;1 of each year, beginning May 1, 2018, the Borrower shall prepay the then-outstanding Loans by an amount equal
to 50% of Excess Cash Flow of Limbach, Inc. and its Subsidiaries for the most recently completed fiscal year of Limbach, Inc.;
<I>provided </I>that, if at any time (A) the Senior Leverage Ratio is less than 2.00:1.00 as of the end of two consecutive fiscal
quarters of Limbach, Inc., and Limbach, Inc. has delivered to the Administrative Agent the compliance certificate required by Section
6.1(c) evidencing such computations of the Senior Leverage Ratio and (B) no Default or Event of Default has occurred and is continuing
on such dates, then the Borrower shall prepay the then-outstanding Loans by an amount equal to 25% of Excess Cash Flow for the
duration of this Agreement; <I>provided, further,</I> that no Excess Cash Flow payment shall be required under this Section 2.8(b)(v)
for the duration of this Agreement to the extent that (x) the Senior Leverage Ratio is less than 1.50:1.00 as of the end of two
consecutive fiscal quarters of Limbach, Inc. and Limbach, Inc. has delivered to the Administrative Agent the compliance certificate
required by Section 6.1(c) evidencing such computations of the Senior Leverage Ratio and (y) no Default or Event of Default has
occurred and is continuing on such dates. The amount of each such prepayment shall be applied first to the outstanding Bridge Term
Loans until paid in full, then to the outstanding Term Loans until paid in full, then to the Revolving Loans until paid in full
(without a permanent reduction of the Revolving Commitments), and then to the Swing Loans.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
second sentence appearing in Section 5.3 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">As of any date
after the Third Amendment Effective Date, the consolidated balance sheet of Limbach, Inc. and its Subsidiaries and the related
consolidated statements of income and retained earnings and of cash flows most recently furnished to the Administrative Agent pursuant
to Section 6.1(a), fairly and adequately present in all material respects the consolidated financial condition of Limbach, Inc.
and its Subsidiaries as at said dates and the consolidated results of their operations and cash flows for the periods then ended
in conformity with GAAP applied on a consistent basis.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 3 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(a) of Section 6.1 of the Credit Agreement is amended by replacing the reference to <I>&ldquo;the Parent&rdquo;</I> in each place
it appears therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clauses
(b) and (c) of Section 6.1 of the Credit Agreement are amended and restated in their entireties to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Annual
Statements</I>. Within one hundred twenty (120) days after the close of each fiscal year of Limbach, Inc., (i) a copy of Limbach,
Inc.&rsquo;s consolidated balance sheet as of the last day of the fiscal year then ended and Limbach, Inc.&rsquo;s consolidated
statements of income, retained earnings, and cash flows for the fiscal year then ended, and accompanying notes thereto, each in
reasonable detail showing in comparative form the figures for the previous fiscal year, accompanied by an unqualified opinion of
a firm of independent public accountants of recognized national standing, selected by the Loan Parties and reasonably acceptable
to the Administrative Agent, to the effect that the consolidated financial statements have been prepared in accordance with GAAP
and present fairly in accordance with GAAP the consolidated financial condition of Limbach, Inc. and its Subsidiaries as of the
close of such fiscal year and the results of their operations and cash flows for the fiscal year then ended and that an examination
of such accounts in connection with such financial statements has been made in accordance with generally accepted auditing standards;
<I>provided, </I>that, for the fiscal year ending December 31, 2017, such audited financial statements shall include a footnote
confirming that the Loan Parties are in compliance with the financial covenants set forth in Section 6.20, and (ii) a certificate
in form and substance reasonably acceptable to the Administrative Agent setting forth the consolidating balance sheet and income
statement derived from the audited financial statements delivered pursuant to clause (b)(i) above for the fiscal year then ended,
which shall be certified by the Chief Financial Officer or other Duly Authorized Officer of Limbach, Inc. acceptable to the Administrative
Agent.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Officer&rsquo;s
Certificates.</I> Within fifty (50)&nbsp;days after the end of each of the first three fiscal quarters of each fiscal year of Limbach,
Inc., and within seventy-five (75) days after the end of the last fiscal quarter of each fiscal year of Limbach, Inc., and at the
time of the delivery of the financial statements provided for in Section&nbsp;6.1(b), commencing with the fiscal quarter of Limbach,
Inc. ending December 31,&nbsp;2017, (i)&nbsp;a certificate of the Chief Financial Officer or other Duly Authorized Officer of Limbach,
Inc. acceptable to Administrative Agent in the form of Exhibit&nbsp;E (A)&nbsp;stating no Default or Event of Default has occurred
and is continuing during the period covered by such statements or, if a Default or Event of Default exists, a detailed description
of the Default or Event of Default and all actions the Loan Parties are taking with respect to such Default or Event of Default,
(B)&nbsp;confirming that the representations and warranties stated in Section&nbsp;5 remain true and correct (or, in the case of
any representation or warranty not qualified as to materiality, true and correct in all material respects) as of said time, except
to the extent such representations and warranties relate to an earlier date (and in such case, confirming they are true and correct
(or, in the case of any representation or warranty not qualified as to materiality, true and correct in all material respects)
as of such earlier date), (C)&nbsp;showing detailed covenant calculations evidencing the Loan Parties&rsquo; compliance with the
covenants set forth in Section 6.20 and (D) including a schedule in form and substance reasonably satisfactory to the Administrative
Agent listing in reasonable detail any and all (x) non-recurring, one-time costs and expenses for the four fiscal quarters then
ended and (y) non-cash charges, including stock based compensation expenses, incurred during the four fiscal quarters then ended;
and (ii)&nbsp;a comparison of the current year to date financial results (other than in respect of the balance sheets included
therein) against the budgets required to be submitted pursuant to Section&nbsp;6.1(d).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clauses
(d), (g) and (k) of Section 6.1 of the Credit Agreement are each amended by replacing the reference to <I>&ldquo;the Parent&rdquo;</I>
in each place it appears therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
last sentence of Section 6.2 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">Limbach, Inc.,
the Parent and the Borrower agree to pay (and shall cause each of their Subsidiaries to pay) on demand all reasonable costs, expenses
and fees incurred by the Administrative Agent in connection with any inspections, examinations, or audits of any of the Loan Parties
performed by the Administrative Agent under this Section&nbsp;6.2.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(e) of Section 6.11 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(e)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Guarantees
made by Limbach, Inc. and/or the Parent of Indebtedness allowed under this Section 6.11, <I>provided</I> that such guarantees are
made in the ordinary course of business;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.11.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(h) of Section 6.13 of the Credit Agreement is amended by replacing the reference to <I>&ldquo;the Borrower&rdquo;</I> appearing
therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.12.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(d) of Section 6.14 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(d) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
Loan Parties&rsquo; existing Investments in their respective Subsidiaries on the Closing Date, and Investments made from time to
time in other Loan Parties;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 5 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->5<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.13.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section
6.15 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"><I>Section
6.15. Restricted Payments. </I>No Loan Party shall, nor shall it permit any of its Subsidiaries to, directly or indirectly, declare
or make any Restricted Payments; <I>provided, however,</I> that the foregoing shall not operate to prevent:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
making of dividends or distributions by any Subsidiary to the Borrower or by any Subsidiary to any other Loan Party that is the
parent entity of such Subsidiary;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;so
long as no Event of Default or Default exists or would result therefrom, the Borrower may purchase or redeem (or make distributions
to Limbach, Inc. to permit Limbach, Inc. to purchase or redeem) equity interests of Limbach, Inc. held by employees upon the termination
of such employees, pursuant to that certain Omnibus Incentive Plan of Limbach, Inc., not to exceed $100,000 in any fiscal year
of Limbach, Inc. or $500,000 in the aggregate;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;so
long as no Event of Default or Default exists or would result therefrom, the Borrower may make a one-time distribution to the Parent,
and the Parent may, in turn, make a one-time distribution to Limbach, Inc., to permit Limbach, Inc. to make the Preferred Stock
Repurchase; <I>provided, </I>that (i) the Preferred Stock Repurchase Distribution is made on or prior to January 14, 2018, (ii)
the Preferred Stock Repurchase Distribution does not exceed $10,000,000, and (iii) the proceeds of the Preferred Stock Repurchase
Distribution are used to make the Preferred Stock Repurchase on or prior to January 14, 2018 (the <I>&ldquo;Preferred Stock Repurchase
Distribution&rdquo;</I>).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.14.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clauses
(b), (c) and (d) of Section 6.20 of the Credit Agreement are each amended by replacing the reference to <I>&ldquo;the Parent&rdquo;</I>
in each place it appears therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.15.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(e)(i) of Section 6.20 is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Cash
Equity Contribution Requirements.</I> In the event Limbach, Inc. and its Subsidiaries fail to comply with the financial covenants
set forth in this Section&nbsp;6.20(a), (b), (c) or (d) as of the last day of any fiscal quarter, any cash equity contribution
by Limbach, Inc. to the Parent, which, in turn, will make a cash equity contribution to the Borrower, after the last day of such
fiscal quarter and on or prior to the day that is fifteen (15) days after the day on which financial statements are required to
be delivered for such fiscal quarter will, at the irrevocable election of Limbach, Inc., be included in the calculation of EBITDA
solely for the purposes of determining compliance with such covenants at the end of such fiscal quarter and any subsequent period
that includes such fiscal quarter (any such equity contribution so included in the calculation of EBITDA, a <I>&ldquo;Specified
Equity Contribution&rdquo;</I>); <I>provided</I> that:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 6 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->6<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(A)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;notice
of Limbach, Inc.&rsquo;s intent to receive a Specified Equity Contribution shall be delivered in writing no later than the day
on which financial statements are required to be delivered for the applicable fiscal quarter,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(B)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
amount of any Specified Equity Contribution will be no greater than the amount required to cause Limbach, Inc. to be in compliance
with such covenants,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(C)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;all
Specified Equity Contributions will be disregarded for purposes of the calculation of EBITDA for all other purposes, including
calculating basket levels, pricing, determining compliance with incurrence based or <I>pro forma</I> calculations or conditions,
and other items governed by reference to EBITDA,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(D)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;there
shall be no more than three (3) Specified Equity Contributions during the term of this Agreement,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(E)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;in
each consecutive two fiscal quarter period, there shall be a period of at least one (1) fiscal quarter in respect of which no Specified
Equity Contribution is made,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(F)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
proceeds received by the Borrower from all Specified Equity Contributions shall be promptly used by the Borrower to prepay the
Bridge Term Loans until paid in full, and then to prepay the Term Loans (and such prepayment shall be applied to the remaining
principal installments thereof in inverse order of maturity), and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(G)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any
Loans prepaid with the proceeds of Specified Equity Contributions shall be deemed outstanding for purposes of determining compliance
with such covenants for the current fiscal quarter and any subsequent period that includes such fiscal quarter.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify">Notwithstanding anything to the
contrary in this Agreement, upon timely receipt by Limbach, Inc. in cash of the appropriate Specified Equity Contribution, if after
giving effect thereto as set forth above no Event of Default would then exist under Section&nbsp;6.20(a), (b), (c) and/or (d) on
a <I>pro forma</I> basis, the applicable Event(s) of Default under Section&nbsp;6.20(a), (b), (c) and/or (d) shall be deemed cured.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.16.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clause
(e)(ii) of Section 6.20 of the Credit Agreement is amended by replacing the reference to <I>&ldquo;the Parent&rdquo;</I> in each
place it appears therein with <I>&ldquo;Limbach, Inc.&rdquo;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 7 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->7<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.17.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section
6.25 of the Credit Agreement is amended and restated in its entirety to read as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify"><I>&#9;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section
6.25.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Limitations on Limbach, Inc. and the Parent. </I> (a) Limbach, Inc. shall not, directly or indirectly, (i)&nbsp;other
than with respect to its own Ownership Interests, enter into or permit to exist any transaction (including the incurrence or assumption
of Indebtedness (other than this Agreement, the other Loan Documents, and Indebtedness permitted by Section 6.11), any purchase,
sale, lease or exchange of any Property, or the rendering of any service) between itself and any other Person or (ii) engage in
any material business or conduct any material activity (including the making of any investment or payment other than payments permitted
hereunder), in each case, other than:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 76.5pt; text-align: justify; text-indent: -4.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(A)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;investments
in the Parent, Borrower and their Subsidiaries permitted hereunder,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(B)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
undertaking of all actions necessary or advisable in connection with being a publicly-traded company whether under the applicable
laws of the U.S. Securities and Exchange Commission or the rules of any market on which the equity securities of Limbach, Inc.
are traded or quoted, including the NASDAQ Capital Market, and the performance of ministerial activities and payment of taxes and
administrative fees necessary for the maintenance of its existence and compliance with applicable laws and legal, tax and accounting
matters related thereto,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(C)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transactions
or activities relating to its employees, directors and officers,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(D)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;activities
relating to the performance of obligations under the Loan Documents,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(E)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
receipt and payment of Restricted Payments permitted under Section 6.15,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(F)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any
other transaction or activity that Limbach, Inc. is permitted to take under any Loan Document,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(G)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
performance of its obligations with respect to the Loan Documents,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(H)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;financing
activities, including the issuance of equity securities, and to the extent expressly permitted hereby, the issuance of debt securities,
the providing of guarantees, payment of dividends, and making contributions to the capital of the Parent and the Borrower,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 8 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->8<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(I)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;holding
any cash or property (but not operating any property of any Loan Party or operating any business, except as otherwise permitted
by this Section),</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(J)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;providing
indemnification to officers, managers and directors, and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(K)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;activities
and contractual rights and obligations incidental and reasonably related to the businesses or activities described in clauses (A)
through (J) of this Section 6.25(a).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Parent shall not, directly or indirectly, (i)&nbsp;other than with respect to its own Ownership Interests, enter into or permit
to exist any transaction (including the incurrence or assumption of Indebtedness (other than this Agreement, the other Loan Documents,
and Indebtedness permitted by Section 6.11), any purchase, sale, lease or exchange of any Property, or the rendering of any service)
between itself and any other Person or (ii) engage in any material business or conduct any material activity (including the making
of any investment or payment other than payments permitted hereunder), in each case, other than:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(A)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;investments
in the Borrower and its Subsidiaries permitted hereunder,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(B)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
performance of ministerial activities and payment of taxes and administrative fees necessary for the maintenance of its existence
and compliance with applicable laws and legal, tax and accounting matters related thereto,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(C)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transactions
or activities relating to its employees, directors and officers,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(D)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;activities
relating to the performance of obligations under the Loan Documents,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(E)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
receipt and payment of Restricted Payments permitted under Section 6.15,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(F)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any
other transaction or activity that the Parent is permitted to take under any Loan Document,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(G)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the
performance of its obligations with respect to the Loan Documents,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(H)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;financing
activities, including the issuance of securities, the providing of guarantees, payment of dividends, and making contributions to
the capital of the Borrower, in each instance to the extent expressly permitted hereby,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 9 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->9<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(I)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;holding
any cash or property (but not operating any property of any Loan Party or operating any business, except as otherwise permitted
by this Section),</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(J)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;providing
indemnification to officers, managers and directors, and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">(K)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;activities
and contractual rights and obligations incidental and reasonably related to the businesses or activities described in clauses (A)
through (J) of this Section 6.25(b).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.18.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clauses
(m), (n) and (o) of Section 7.1 of the Credit Agreement are each amended by replacing the reference to <I>&ldquo;the Parent&rdquo;</I>
in each place it appears therein with <I>&ldquo;Limbach, Inc.</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.19.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Exhibit
E to the Credit Agreement is amended and restated in its entirety by Exhibit E attached hereto.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.20.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedule
5.10 to the Credit Agreement is amended and restated in its entirety by Schedule 5.10 attached hereto.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section 3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Conditions
Precedent.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The effectiveness of
this Amendment is subject to the satisfaction of all of the following conditions precedent:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Borrower, the
Guarantors, the Lenders, the Swing Line Lender, the L/C Issuer and the Administrative Agent shall have executed and delivered this
Amendment.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Limbach, Inc. shall
have executed and delivered to the Administrative Agent an Additional Guarantor Supplement in the form of Exhibit G to the Credit
Agreement and an Assumption and Supplement Security Agreement in the form of Schedule G to the Security Agreement.&#9;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received evidence of insurance for Limbach, Inc. required to be maintained under the Loan Documents, naming the
Administrative Agent as additional insured and lenders loss payee, as applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received (i) copies of the Organization Documents of Limbach, Inc., (ii) copies of resolutions of the Board of
Directors (or similar governing body) of Limbach, Inc. authorizing the execution, delivery and performance of the Loan Documents
to which it is a party, together with specimen signatures of the persons authorized to execute such documents on the behalf of
Limbach, Inc., and (iii) a certificate of good standing for Limbach, Inc. from the office of the Secretary of State of the State
of Delaware (dated no earlier than thirty (30) days prior to the date hereof), in each case, certified by a Duly Authorized Officer
of Limbach, Inc.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify"></P>

<!-- Field: Page; Sequence: 10 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->10<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received financing statement, tax and judgment lien search results against Limbach, Inc. and its Property evidence
the absence of Liens thereon (other than Permitted Liens).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received a UCC financing statement to be filed against Limbach, Inc., as debtor, in favor of the Administrative
Agent, as secured party.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received the favorable written opinion of counsel to Limbach, Inc., in form and substance satisfactory to the
Administrative Agent.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received all documentation and other information requested by any Lender required by bank regulatory authorities
under applicable &ldquo;know your customer&rdquo; and anti-money laundering rules and regulations, including the Patriot Act; and
the Administrative Agent shall have received a fully executed IRS Form W-9 for Limbach, Inc.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Administrative
Agent shall have received such other agreements, instruments, documents and certificates as the Administrative Agent may reasonably
request.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.10.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Legal matters incident
to the execution and delivery of this Amendment shall be satisfactory to the Administrative Agent and its counsel.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Affirmation
of Guarantors.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Each Guarantor hereby
confirms that, after giving effect to this Amendment, each Loan Document to which such Guarantor is a party continues in full force
and effect and is the legal, valid and binding obligation of such Guarantor, enforceable against such Guarantor in accordance with
its terms except as enforceability may be limited by applicable bankruptcy, insolvency, or similar laws affecting the enforcement
of creditors&rsquo; rights generally or by equitable principles relating to enforceability. The Borrower and each Guarantor acknowledge
and agree that (a) nothing in the Credit Agreement, this Amendment, or any other Loan Document shall be deemed to require the consent
of such Guarantor to any future amendments to the Credit Agreement, and (b) the Lenders are relying on the assurances provided
in this Section in entering into this Amendment and maintaining credit outstanding to the Borrower.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section 5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Acknowledgement
of Liens.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The Borrower and the
Guarantors hereby acknowledge, confirm and agree that the Administrative Agent has a valid, enforceable and perfected first-priority
lien upon and security interest in the Collateral granted to the Administrative Agent pursuant to the Loan Documents (subject only
to Permitted Liens), and nothing herein contained shall in any manner affect or impair the priority of the Liens created and provided
for thereby as to the indebtedness, obligations, and liabilities which would be secured thereby prior to giving effect to this
Amendment.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 11 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->11<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section&nbsp;6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Representations
and Warranties of Borrower and Guarantors.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">To induce the Administrative
Agent, the Lenders and the L/C Issuer to enter into this Amendment, the Borrower and the Guarantors hereby represent and warrant
to the Administrative Agent, the Lenders and the L/C Issuer that, as of the date hereof, (a)&nbsp;after giving effect to this Amendment,
the representations and warranties set forth in Section&nbsp;5 of the Credit Agreement and in the other Loan Documents, including
this Amendment, are and shall remain true and correct (or, in the case of any representation or warranty not qualified as to materiality,
true and correct in all material respects), except to the extent the same expressly relate to an earlier date (and in such case
shall be true and correct (or, in the case of any representation or warranty not qualified as to materiality, true and correct
in all material respects) as of such earlier date), (b)&nbsp; no Default or Event of Default exists or shall result after giving
effect to this Amendment, and (c) the Borrower and each Guarantor has the power and authority to execute, deliver, and perform
this Amendment and have taken all necessary action to authorize their execution, delivery, and performance of this Amendment.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">Section 7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Miscellaneous.</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 84.95pt; text-indent: -84.95pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Amendment shall be binding
on and shall inure to the benefit of the Borrower, the Guarantors, the Administrative Agent, the Lenders, and the L/C Issuer, and
their respective successors and assigns. The terms and provisions of this Amendment are for the purpose of defining the relative
rights and obligations of the Borrower, the Guarantors, the Administrative Agent, the Lenders, and the L/C Issuer with respect
to the transactions contemplated hereby, and there shall be no third-party beneficiaries of any of the terms and provisions of
this Amendment.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Amendment constitutes
the entire agreement of the parties with respect to the subject matter hereof and supersedes all other understandings, oral or
written, with respect to the subject matter hereof. Except as specifically waived and amended hereby, all of the terms and conditions
set forth in the Credit Agreement shall stand and remain unchanged and in full force and effect.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;and sub-section
headings in this Amendment are included herein for convenience of reference only and shall not constitute a part of this Amendment
for any other purpose.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Wherever possible, each provision
of this Amendment shall be interpreted in such a manner as to be effective and valid under applicable law, but if any provision
of this Amendment shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of
such prohibition or invalidity, without invalidating the remainder of such provision or the remaining provisions of this Amendment.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<!-- Field: Page; Sequence: 12 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->12<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Except as otherwise provided
in this Amendment, if any provision contained in this Amendment is in conflict with, or inconsistent with, any provision in any
of the Loan Documents, the provision contained in this Amendment shall govern and control.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Amendment may be executed
in any number of separate counterparts, each of which shall collectively and separately constitute one agreement. Delivery of an
executed signature page to this Amendment by facsimile transmission or by e-mail transmission of an Adobe portable document format
file (also known as a &ldquo;PDF&rdquo; file) shall be effective as delivery of a manually executed counterpart hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The provisions contained in
Sections&nbsp;10.14 (Governing Law; Jurisdiction; Etc.) and 10.20 (Waiver of Jury Trial) of the Credit Agreement are incorporated
herein by reference to the same extent as if reproduced herein in their entirety, except with reference to this Amendment rather
than the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Pages to Follow]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 13 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->13<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">In
Witness Whereof</FONT>, the parties hereto have caused their duly authorized officers to execute and deliver this Amendment as
of the date first set forth above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-align: left; text-indent: 0"><FONT STYLE="font-variant: small-caps"><I>&ldquo;Borrower&rdquo;</I></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-align: left; text-indent: 0"><FONT STYLE="font-variant: small-caps">Limbach Facility Services LLC</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: left; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0; text-align: left"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: left; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President, Chief</P>
                                                             <P STYLE="margin-top: 0; margin-bottom: 0">Financial Officer and Treasurer</P></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 14 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0"><I>&nbsp;</I></TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0"><I>&ldquo;Guarantors&rdquo;</I></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Limbach Holdings, Inc.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>Scott Wright</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">Scott Wright</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Corporate Secretary</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Limbach Holdings LLC</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President, Chief</P>
                                           <P STYLE="margin-top: 0; margin-bottom: 0">Financial Officer and Treasurer</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Limbach Company LLC</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President, Chief</P>
                                           <P STYLE="margin-top: 0; margin-bottom: 0">Financial Officer and Treasurer</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Harper Limbach LLC</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President and</P>
                                           <P STYLE="margin-top: 0; margin-bottom: 0">Treasurer</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Limbach Company LP</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President, Chief</P>
                                           <P STYLE="margin-top: 0; margin-bottom: 0">Financial Officer and Treasurer</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Harper Limbach Construction LLC</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John T. Jordan, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John T. Jordan, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Executive Vice President and</P>
                                           <P STYLE="margin-top: 0; margin-bottom: 0">Treasurer</P></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>


<!-- Field: Page; Sequence: 15 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0"><I>&nbsp;&ldquo;Lenders&rdquo;</I></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Fifth Third Bank, an Ohio banking</P>
                                                       <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;&nbsp;&nbsp;&nbsp;corporation, as a Lender, as L/C&nbsp;Issuer, and as</P>
                                                       <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;&nbsp;&nbsp;&nbsp;Administrative Agent</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>S. Bradley McDougall</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">S. Bradley McDougall</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Vice President</TD></TR>
</TABLE>


<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 16 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt"><FONT STYLE="font-variant: small-caps">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">CIBC Bank USA, formally known as The</P>
                                                       <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;&nbsp;&nbsp;&nbsp;PrivateBank and Trust Company, as a Lender</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>David L. Sauerman</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">David L. Sauerman</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Managing Member</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT>&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>


<!-- Field: Page; Sequence: 17 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0"><P STYLE="margin-top: 0; margin-bottom: 0">Wheaton Bank &amp; Trust Company, as a</P>
                                                       <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;&nbsp;&nbsp;&nbsp;Lender</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>Christopher Van Tassel</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Christopher Van Tassel</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Vice President</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 245.5pt; text-indent: -11.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 18 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-indent: 0">Citizens Bank of Pennsylvania, as a Lender</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>John J. Ligday, Jr.</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">John J. Ligday, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Senior Vice President</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Third Amendment to Credit Agreement (Limbach Facility Services LLC)]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 19 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Exhibit&nbsp;E</B></FONT>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>___________________________________________________</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Compliance
Certificate</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">Date:&nbsp;&nbsp;__________, 20__</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">To:</TD><TD STYLE="text-align: justify; padding-right: 3.25in"><P STYLE="margin-top: 0; margin-bottom: 0">Fifth Third Bank, as Administrative</P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">Agent under, and the Lenders party to, the</P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">Credit Agreement described below</P></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Reference is made to
the Credit Agreement, dated as of July 20, 2016, by and among <FONT STYLE="font-variant: small-caps">Limbach Facility Services
LLC</FONT>, a Delaware limited liability company (the <I>&ldquo;Borrower&rdquo;</I>), <FONT STYLE="font-variant: small-caps">Limbach
Holdings LLC</FONT>, a Delaware limited liability company (the <I>&ldquo;Parent&rdquo;</I>), the other Guarantors party thereto,
the Lenders party thereto, and Fifth Third Bank, an Ohio banking corporation, as Administrative Agent and L/C Issuer (as amended,
restated, modified or supplemented from time to time, the <I>&ldquo;Credit Agreement&rdquo;</I>). Capitalized terms used herein
and not defined herein have the meanings assigned to them in the Credit Agreement. This Compliance Certificate is furnished to
the Administrative Agent and the Lenders pursuant to the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">The
Undersigned, solely in the capacity set forth in paragraph 1 below and not in any individual capacity, hereby certifies that:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I am the duly elected/appointed
____________ of Limbach, Inc.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I have reviewed the terms of
the Credit Agreement and I have made, or have caused to be made under my supervision, a detailed review of the transactions and
conditions of Limbach, Inc. and its Subsidiaries during the accounting period covered by the attached financial statements.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No Default or Event of Default
has occurred and is continuing during or at the end of the accounting period covered by the attached financial statements or as
of the date of this Compliance Certificate, except as set forth below.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The financial statements required
by Section&nbsp;6.1 of the Credit Agreement and being furnished to you concurrently with this Compliance Certificate fairly and
adequately present in all material respects the financial condition of Limbach, Inc. and its Subsidiaries as of <B>[___________]</B>,
and the results of their operations and cash flows for the <B>[quarter/year]</B> ended, in conformity with GAAP applied on a consistent
basis.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The representations and warranties
contained in Section&nbsp;5 of the Credit Agreement are true and correct (or, in the case of any representation or warranty not
qualified as to materiality, true and correct in all material respects) as though made on and as of such date (except to the extent
such representations and warranties relate to an earlier date, in which case they are true and correct (or, in the case of any
representation or warranty not qualified as to materiality, true and correct in all material respects) as of such earlier date).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<!-- Field: Page; Sequence: 20 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedule&nbsp;I hereto sets forth
financial data and computations evidencing the Loan Parties&rsquo; compliance with certain covenants of the Credit Agreement, all
of which data and computations are, to the best of my knowledge, true, complete and correct and have been made in accordance with
the relevant Sections of the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedule&nbsp;II hereto sets
forth a comparison of current financials against the budget for such period as required by Section&nbsp;6.1(d) of the Credit Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedule III hereto sets forth
a list of all non-recurring, one-time costs and expenses incurred during the accounting period covered by the attached financial
statements.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Attached hereto is an updated
Schedule 5.9 to the Credit Agreement, which is true, complete and correct as of the date of this Compliance Certificate.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">10.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Described
below are the exceptions, if any, to paragraph&nbsp;3 above by listing, in detail, the nature of the condition or event, the period
during which it has existed and the action which the Loan Parties have taken, are taking, or propose to take with respect to each
such condition or event:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">________________________________________________________________&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 45.35pt 0pt 0.5in; text-indent: 423pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">________________________________________________________________&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 45pt 0pt 0.5in; text-indent: 423pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">________________________________________________________________&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 45pt 0pt 0.5in; text-indent: 423pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">________________________________________________________________&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 45.35pt 0pt 0.5in; text-indent: 423pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">In the event of a conflict
between the attached Schedule&nbsp;I and any certifications relating thereto and the Credit Agreement and related definitions used
in calculating such covenants, the Credit Agreement and such related definitions shall govern and control. The foregoing certifications,
together with the computations set forth in Schedule&nbsp;I hereto, the financial statements and information attached as Schedule
II and Schedule III hereto in support hereof, are made and delivered as of the date first above written.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-align: left; text-indent: 0"><FONT STYLE="font-variant: small-caps">Limbach Holdings, Inc.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: left; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name</TD>
    <TD STYLE="padding: 0; text-indent: 0; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title</TD>
    <TD STYLE="padding: 0; text-indent: 0; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3.25in">&nbsp;</P>


<!-- Field: Page; Sequence: 21; Options: NewSection; Value: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule&nbsp;I</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps"><B>to
Compliance Certificate</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Limbach
Facility Services LLC</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Compliance
Calculations</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps"><B>for
Credit Agreement dated as of July 20, 2016</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-variant: small-caps">Calculations
as of _____________, </FONT>20__</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0.5in">&nbsp;</P>



<P STYLE="margin: 0">&nbsp;</P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 3pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; border-bottom: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="margin: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">A.</TD>
    <TD COLSPAN="2" STYLE="padding: 0 0 8pt"><U>Reserved.</U></TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">B.</TD>
    <TD COLSPAN="2" STYLE="padding: 0 0 8pt"><U>Senior Leverage Ratio (Section 6.20(b))</U></TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; width: 0.5in">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; width: 0.5in">1.</TD>
    <TD STYLE="padding: 0 0 8pt">Total Funded Debt<FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; vertical-align: baseline">[1]</FONT></TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center; width: 1.5in">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">2.</TD>
    <TD STYLE="padding: 0 0 8pt">Subordinated Debt</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">3.</TD>
    <TD STYLE="padding: 0 0 8pt">Line B1 <I>minus</I> Line B2</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">4.</TD>
    <TD STYLE="padding: 0 0 8pt">Net Income for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">5.</TD>
    <TD STYLE="padding: 0 0 8pt">Interest Expense for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">6.</TD>
    <TD STYLE="padding: 0 0 8pt">Federal, state and local income taxes for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">7.</TD>
    <TD STYLE="padding: 0 0 8pt">Depreciation and amortization expense for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">8.</TD>
    <TD STYLE="padding: 0 0 8pt">Transaction expenses incurred in connection with Permitted Acquisitions, whether or not consummated (not to exceed $50,000 in the aggregate) for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">9.</TD>
    <TD STYLE="padding: 0 0 8pt">Non-recurring, one-time costs and expenses approved by the Administrative Agent in its sole discretion not to exceed $250,000 in the aggregate during such 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">10.</TD>
    <TD STYLE="padding: 0 0 8pt">Losses or other charges related to Legacy Claims for past 4 quarters in an amount not to exceed $500,000 during such 4 quarters (and in an aggregate amount not to exceed $2,500,000 during the term of the Credit Agreement)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">11.</TD>
    <TD STYLE="padding: 0 0 8pt">Non-cash charges, including stock based compensation expenses, incurred during past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">12.</TD>
    <TD STYLE="padding: 0 0 8pt">Non-cash gains realized during past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt">13.</TD>
    <TD STYLE="padding: 0 0 8pt">Sum of Lines B4, B5, B6, B7, B8, B9, B10, and B11, <I>minus </I>Line B12 (<I>&ldquo;EBITDA&rdquo;</I>)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
</TABLE>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: -0.5in">&nbsp;</P>

<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 3pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; width: 25%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><SUP>1</SUP></FONT> Total Funded
Debt does not include obligations in respect of Bonding Agreements.</P>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 22 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in; padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 0.5in; padding: 0 0 8pt; text-indent: 0">14.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Ratio of Line B3 to Line B13 (<I>&ldquo;Senior Leverage Ratio&rdquo;</I>)</TD>
    <TD STYLE="width: 1.5in; padding: 0 0 8pt; text-align: center">____:1.00</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">15.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Senior Leverage Ratio (from Line B14) must not exceed</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">____:1.00</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">16.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Limbach, Inc. and its Subsidiaries are in compliance (circle yes or no)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">yes/no</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">C.</TD>
    <TD COLSPAN="2" STYLE="padding: 0 0 8pt; text-indent: 0"><U>Fixed Charge Coverage Ratio (Section&nbsp;6.20(c))</U></TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">1.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">EBITDA (from Line B13)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">2.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Capital Expenditures not financed with Indebtedness for past 4&nbsp;quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">3.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Line C1 <I>minus</I> Line C2</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">4.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Regularly Scheduled Principal Payments (excluding any Excess Cash Flow payment) for past 4&nbsp;quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">5.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Cash portion of Interest Expense for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">6.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Restricted Payments made pursuant to Section 6.15(b) for past 4 quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">7.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Federal, state and local income taxes paid in cash for past 4&nbsp;quarters</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">8.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Sum of Lines C4, C5, C6 and C7 (<I>&ldquo;Fixed Charges&rdquo;</I>)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">9.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Ratio of Line C3 to Line C8 (<I>&ldquo;Fixed Charge Coverage Ratio&rdquo;</I>)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">____:1.00</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">10.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Fixed Charge Coverage Ratio (from Line C9) must not be less than</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">1.25:1.00</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">11.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Limbach, Inc. and its Subsidiaries are in compliance (circle yes or no)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">yes/no</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">D.</TD>
    <TD COLSPAN="2" STYLE="padding: 0 0 8pt; text-indent: 0"><U>Minimum Tangible Net Worth (Section&nbsp;6.20(d))</U></TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">1.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Capital stock (less treasury stock), paid-in capital surplus and retained earnings (deficit) of Limbach, Inc. and any of its Subsidiaries (excluding inter-company items and all amounts properly attributable to minority interests, if any, in the stock and surplus of any such Subsidiary)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">2.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Deferred charges (less amortization, unamortized debt discount and expenses and corporate organization expenses)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">3.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Book amount of all assets which would be treated as intangibles under GAAP, including, without limitation, such items as goodwill, trademark applications, trade names, service marks, brand names, copyrights, patents, patent applications and licenses, and rights with respect to the foregoing</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="margin: 0">&nbsp;&nbsp;&nbsp;</P>

<P STYLE="margin: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 23; Options: NewSection; Value: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin-top: 0; margin-bottom: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in; padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 0.5in; padding: 0 0 8pt; text-indent: 0">4.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Amount by which aggregate inventories or aggregate securities appearing on the asset side of such consolidated balance sheet exceed the lower of cost or market value (at the date of such balance sheet)</TD>
    <TD STYLE="width: 1.5in; padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">5.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Any write-up in the book amount of any asset resulting from a revaluation thereof from the book amount entered upon acquisition of such asset</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">6.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Sum of Lines D2, D3, D4 and D5</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">7.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Line D1 <I>minus </I>Line D6</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">8.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">Line D7 must be less than</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">$___________</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">9.</TD>
    <TD STYLE="padding: 0 0 8pt; text-indent: 0">The Loan Parties are in compliance (circle yes or no)</TD>
    <TD STYLE="padding: 0 0 8pt; text-align: center">yes/no</TD></TR>
</TABLE>


<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 24; Value: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">- <!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --> -</TD><TD STYLE="width: 33%; text-align: right">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule&nbsp;II</B></FONT>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>to
Compliance Certificate</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Limbach
Facility Services LLC</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Financial
Statements</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>for
Credit Agreement dated as of July 20, 2016</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">[See attached.]</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


<!-- Field: Page; Sequence: 25 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule&nbsp;III</B></FONT>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>to
Compliance Certificate</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Limbach
Facility Services LLC</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule
of Non-Recurring, One-Time Costs and </B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Expenses
and Non-Cash Charges</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>


<!-- Field: Page; Sequence: 26 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule&nbsp;5.9</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>to
Compliance Certificate</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Limbach
Facility Services LLC</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Updated
Schedule 5.9</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>for
Credit Agreement dated as of July 20, 2016</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>


<!-- Field: Page; Sequence: 27 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Schedule&nbsp;5.10</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Subsidiaries</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B><U>List of Subsidiaries of each Loan Party: </U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">1.</FONT></TD><TD>Limbach Holdings LLC is a wholly-owned subsidiary of Limbach Holdings, Inc.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">2.</FONT></TD><TD>Limbach Facility Services LLC is a wholly-owned Subsidiary of Limbach Holdings LLC.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif">3.</FONT></TD><TD STYLE="text-align: justify">Harper Limbach Construction LLC, Harper Limbach LLC and
Limbach Company LLC are wholly-owned Subsidiaries of Limbach Facility Services LLC.</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0.05in 0pt 0.5in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">4.</FONT></TD><TD STYLE="text-align: justify; padding-right: 0.05in">Limbach Company LP is 99%-owned by Limbach Facility Services LLC and 1%-owned
by Limbach Company LLC.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top; background-color: #D9D9D9">
    <TD STYLE="width: 25%; border: black 1pt solid; padding-bottom: 39.55pt; text-align: center"><B>Subsidiary</B></TD>
    <TD STYLE="width: 18%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.6pt; padding-left: 0.1in"><P STYLE="margin-top: 0; margin-bottom: 0; text-align: center"><B>Jurisdiction of</B></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0; text-align: center"><B>Organization</B></P></TD>
    <TD STYLE="width: 26%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 39.55pt; padding-left: 32.3pt; text-align: center"><B>Holder(s)</B></TD>
    <TD STYLE="width: 31%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.7pt; text-align: center"><B>Percentage of </B><BR>
<B>Subsidiary&rsquo;s Equity </B><BR>
<B>Interests Held</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-bottom: 11.6pt; padding-left: 5.4pt">Limbach Holdings LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.5pt; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 27pt; padding-bottom: 11.6pt; padding-left: 0.05in">Limbach Holdings, Inc. </TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.6pt; padding-left: 5.4pt">100% membership interest</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-bottom: 11.6pt; padding-left: 5.4pt">Limbach Facility Services LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.5pt; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 27pt; padding-bottom: 11.6pt; padding-left: 0.05in">Limbach Holdings LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.6pt; padding-left: 5.4pt">10 Units (100% membership interest)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-bottom: 11.3pt; padding-left: 5.4pt">Harper Limbach Construction LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.25pt; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.3pt; padding-left: 5.4pt">Limbach Facility Services LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.3pt; padding-left: 5.4pt">10 Units (100% membership interest)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-bottom: 25.25pt; padding-left: 5.55pt">Harper Limbach LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.25pt; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.1pt; padding-left: 5.4pt">Limbach Facility Services LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.1pt; padding-left: 5.4pt">10 Units (100% membership interest)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD ROWSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 19.8pt; padding-bottom: 52.15pt; padding-left: 5.4pt">Limbach Company LP</TD>
    <TD ROWSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 11.8pt; padding-left: 5.4pt">Limbach Facility Services LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.7pt; padding-left: 5.3pt">99% partnership interest</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 23.4pt; padding-bottom: 11.6pt; padding-left: 0.05in">Limbach Company LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 25.5pt; padding-left: 5.3pt">1% partnership interest</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-bottom: 12.05pt; padding-left: 5.4pt">Limbach Company LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 26pt; padding-left: 5.3pt">Delaware</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 12.05pt; padding-left: 5.4pt">Limbach Facility Services LLC</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-bottom: 12.05pt; padding-left: 5.4pt">10 Units (100% membership interest)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Page; Sequence: 28; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: -0.5in">&nbsp;</P>



<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>tv489524_ex10-2.htm
<DESCRIPTION>EXHIBIT 10.2
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0; text-align: right"><B>Exhibit 10.2</B></P>

<P STYLE="margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Assumption and Supplement
to Security Agreement</P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">This
Assumption and Supplement to Security Agreement </FONT>(this <I>&ldquo;Agreement&rdquo;</I>) dated as of this 21st day of March,
2018 from <FONT STYLE="font-variant: small-caps">Limbach Holdings, Inc.</FONT>, a Delaware corporation (the <I>&ldquo;New Debtor&rdquo;</I>),
to Fifth Third Bank, an Ohio banking corporation (<I>&ldquo;Fifth Third&rdquo;</I>), as administrative agent for the Secured Creditors
(defined in the Security Agreement hereinafter identified and defined) (Fifth Third acting as such agent and any successor or successors
to Fifth Third in such capacity being hereinafter referred to as the <I>&ldquo;Administrative Agent&rdquo;</I>).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Preliminary Statements</P>

<P STYLE="font: small-caps bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Limbach Facility Services LLC
(the <I>&ldquo;Borrower&rdquo;</I>) and certain other parties have executed and delivered to the Administrative Agent that certain
Security Agreement dated as of July 20, 2016 (such Security Agreement, as the same may from time to time be amended, modified or
restated, including supplements thereto which add additional parties as Debtors thereunder, being hereinafter referred to as the
<I>&ldquo;Security Agreement&rdquo;</I>), pursuant to which such parties (the <I>&ldquo;Existing Debtors&rdquo;</I>) have granted
to the Administrative Agent for the benefit of the Secured Creditors a Lien on and security interest in the Existing Debtors&rsquo;
Collateral (as such term is defined in the Security Agreement) to secure the Secured Obligations (as such term is defined in the
Security Agreement).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Borrower provides the New
Debtor with substantial financial, managerial, administrative, and technical support and the New Debtor will benefit, directly
and indirectly, from credit and other financial accommodations extended by the Secured Creditors to the Borrower.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-variant: small-caps">Now,
therefore, for value received,</FONT> and in consideration of advances made or to be made, or credit accommodations given or to
be given, to the Borrower by the Secured Creditors from time to time, the New Debtor hereby agrees as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The New Debtor acknowledges and
agrees that it shall become a &ldquo;Debtor&rdquo; party to the Security Agreement effective upon the date of the New Debtor&rsquo;s
execution of this Agreement and the delivery of this Agreement to the Administrative Agent, and that upon such execution and delivery,
all references in the Security Agreement to the terms &ldquo;Debtor&rdquo; or &ldquo;Debtors&rdquo; shall be deemed to include
the New Debtor. Without limiting the generality of the foregoing, the New Debtor hereby repeats and reaffirms all grants (including
the grant of a Lien and security interest), covenants, agreements, representations, and warranties contained in the Security Agreement
as amended hereby, each and all of which are and shall remain applicable to the Collateral from time to time owned by the New Debtor
or in which the New Debtor from time to time has any rights. Without limiting the foregoing, in order to secure payment of the
Secured Obligations, whether now existing or hereafter arising, the New Debtor does hereby grant to the Administrative Agent for
the benefit of the Secured Creditors, and hereby agrees that the Administrative Agent has and shall continue to have for the benefit
of the Secured Creditors a continuing Lien on and security interest in, among other things, all of the New Debtor&rsquo;s Collateral
(as such term is defined in the Security Agreement), including, without limitation, all of the New Debtor&rsquo;s Accounts, Chattel
Paper, Instruments, Documents, General Intangibles Letter-of-Credit Rights, Supporting Obligations, Deposit Accounts, Investment
Property, Inventory, Equipment, Fixtures, Commercial Tort Claims, and all of the other Collateral described in Section&nbsp;2 of
the Security Agreement, each and all of such granting clauses being incorporated herein by reference with the same force and effect
as if set forth herein in their entirety except that all references in such clauses to the Existing Debtors or any of them shall
be deemed to include references to the New Debtor. Nothing contained herein shall in any manner impair the priority of the liens
and security interests heretofore granted in favor of the Administrative Agent under the Security Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedules&nbsp;A (Locations),
Schedule&nbsp;B (Other Names), Schedule&nbsp;C (Intellectual Property Rights), Schedule&nbsp;D (Real Estate Legal Descriptions),
Schedule&nbsp;E (Investment Property, Subsidiary Interests and Deposits) and Schedule&nbsp;F (Commercial Tort Claims) to the Security
Agreement shall be supplemented (or amended and restated) by the information stated below with respect to the New Debtor:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Schedule
A</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Locations</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">(Amended
and Restated)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 37%; border: black 1pt solid; padding: 16pt 5pt 5pt; font-size: 10pt; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name
of Debtor (and State of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">Organization and Organizational<BR>
Registration Number)</FONT></P></TD>
    <TD STYLE="width: 32%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 16pt 5pt 5pt; font-size: 10pt; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0">
<FONT STYLE="font-size: 10pt; font-variant: small-caps">Chief
Executive Office (and<BR>
name of record owner of such<BR>
location)</FONT></P></TD>
    <TD STYLE="width: 31%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 16pt 5pt 5pt; font-size: 10pt; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Additional
Places of Business<BR>
and
Collateral Locations</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">(and name of record owner of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">such locations)</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limbach Holdings, Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number:</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5516912</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limbach Holdings LLC</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number:</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">3588231</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limbach Facility Services LLC&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization
Number:</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">3555584</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">1251 Waterfront Place</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: The Buncher Company)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">301 East Pine Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Suites 400 and 450</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Orlando, FL 32801</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Highwoods Realty</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limited Partnership)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">141 Parkway Road</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Office No. 11</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Bronxville, NY 10708</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Milburn Parkway, LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: black 1pt solid; padding: 5pt; text-align: center; border-top: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name
of Debtor (and State of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">Organization and Organizational<BR>
Registration Number)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 5pt; border-top: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Chief
Executive Office (and<BR>
name of record owner of such<BR>
location)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 5pt; border-top: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Additional
Places of Business<BR>
and
Collateral Locations</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">(and name of record owner of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">such locations)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; width: 37%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limbach Company LLC</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number:</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">3555572</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; width: 31%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">1139 Broad Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Greensburg, PA 15601</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Transpac, Inc.)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">175 Titus Avenue</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Suite 100</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Warrington, PA 18976</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: 175 Titus Partners, LP)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5C Chris Court</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Dayton, NJ 08810</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: LIT-CHRIS/RIDGE LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">926 Featherstone Road</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pontiac, MI 48342</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Limbach Company LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">45 Grand River Ave</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Suite 401</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Detroit, MI 48226</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: 45 Grand River LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">624 Truck Court</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Lansing, MI 48912</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Tamara L.L.C.)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">822 Cleveland Ave</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Columbus, OH 43201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: 243 Limited Partnership)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">619 Reynolds Ave.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Columbus, OH 43201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: 243 Limited Partnership)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">16635 Canaanville Hills Rd</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Athens, OH 45791</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: JBH Investments, LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 3 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt; text-align: center; border-top: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name
of Debtor (and State of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">Organization and Organizational<BR>
Registration Number)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 5pt; font-size: 10pt; text-align: center; border-top: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Chief
Executive Office (and<BR>
name of record owner of such<BR>
location)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 5pt; text-align: center; border-top: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Additional
Places of Business<BR>
and
Collateral Locations</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">(and name of record owner of</FONT><BR>
<FONT STYLE="font-size: 10pt; font-variant: small-caps">such locations)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt; width: 37%">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt; width: 32%">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; width: 31%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">46 Jonspin Road</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Wilmington, MA 01187</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Jonspin Realty Trust)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">13261 Mid-Atlantic Blvd.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Laurel, MD 20708</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Jackson-Shaw / Brickyard LP)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Limbach Company LP</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number:</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">3598729</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">1709 Apollo Court</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Seal Beach, CA</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: TPX Apollo, LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Harper Limbach LLC</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number: 3555571</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 15201</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">940 Williston Park Point</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Lake Mary, FL 32746</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Butters Realty &amp; Mtg.)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Warehouse) 4265 Church Street, Suite 101</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Sanford, FL 32771 (Record Owner: Global Commercial Properties
        LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">13261 West Laurel Street, Suite 800</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tampa, FL 3307</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Menke Pyramid, LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Harper Limbach Construction LLC</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Delaware Organization Number: 5223617</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">31-35th Street</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pittsburgh, PA 1520</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Giant Eagle, 35th Strouss Associates)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">13261 West Laurel Street, Suite 800</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tampa, FL 3307</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Menke Pyramid, LLC)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding: 5pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">940 Williston Park Point</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Lake Mary, FL 32746</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Record Owner: Butters Realty &amp; Mtg.)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Supplement
to Schedule B</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 52%; padding: 0; font-size: 10pt; text-align: center; text-indent: 0"><FONT STYLE="font-variant: small-caps">Name of Debtor</FONT></TD>
    <TD STYLE="width: 48%; padding: 0; font-size: 10pt; text-align: center; text-indent: 0"><FONT STYLE="font-variant: small-caps">Prior Legal Names of Such Debtor</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>Limbach Holdings, Inc.</U>&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0"><U>1347 Capital Corp. </U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Name
        of Debtor</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>Limbach Holdings, Inc.</U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P></TD>
    <TD STYLE="padding: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Trade
        Names of Such Debtor</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><U>N/A</U></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Supplement
to Schedule&nbsp;C</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Intellectual Property Rights</P>

<P STYLE="font: small-caps 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">None.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">&nbsp;</FONT>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Supplement
to Schedule D</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; padding-right: 4pt; padding-left: 4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Real
        Estate Legal Descriptions</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">None.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Supplement
to Schedule E</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Investment
Property, Subsidiary Interests and Deposits</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-variant: small-caps">A.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-variant: small-caps">Investment
                                         Property (Other Than Subsidiary Interests)</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">None.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left">B.</TD><TD STYLE="text-align: justify">Subsidiary Interests</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 11%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name of Debtor</FONT></TD>
    <TD STYLE="width: 11%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name of Subsidiary Issuer</FONT></TD>
    <TD STYLE="width: 25%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Type of Organization</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">(e.g., Corporation,</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Partnership, Limited</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Liability Company</FONT></P></TD>
    <TD STYLE="width: 13%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Jurisdiction of Organization</FONT></TD>
    <TD STYLE="width: 13%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">No. of Issued Shares/Units</FONT></TD>
    <TD STYLE="width: 11%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Certificate No. (If Any)</FONT></TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Percentage of</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Issuer&rsquo;s</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Ownership</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Interests</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-bottom: Black 1pt solid; border-left: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">Limbach Holdings, Inc.</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">Limbach Holdings LLC</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">Corporation</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">Delaware</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">N/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">N/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; border-bottom: Black 1pt solid; border-right: Black 1pt solid"><FONT STYLE="font-size: 10pt">100%</FONT></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<!-- Field: Page; Sequence: 5 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-variant: small-caps">C.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-variant: small-caps">Deposits</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 41%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name of Debtor</FONT></TD>
    <TD STYLE="width: 25%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Name of Depository</FONT></TD>
    <TD STYLE="width: 18%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Type of Account</FONT></TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-right: Black 1pt solid; border-left: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Account</FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-size: 10pt; font-variant: small-caps">Number</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Limbach Holdings, Inc.</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Fifth Third Bank</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Operating Account</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-right: Black 1pt solid; border-left: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0"></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;<FONT STYLE="font-size: 10pt; background-color: white">x6917</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Limbach Company LLC, d/b/a Limbach Watson JV II</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">The Private Bank &amp; Trust</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Joint Venture Account</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-right: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">x7242&plusmn;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Limbach Company LLC, d/b/a HMP II JV</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Wheaton Bank &amp; Trust Company</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border-top: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid"><FONT STYLE="font-size: 10pt">Joint Venture Account</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 0; text-indent: 0; border: Black 1pt solid"><FONT STYLE="font-size: 10pt">X1742&plusmn;</FONT></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">* Note: Accounts to include such other deposit accounts maintained
from time to time with the Administrative Agent.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="margin: 0pt 0">** Note: Accounts marked with &plusmn; are Excluded Deposit Accounts (as defined in the Credit Agreement).</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Supplement to Schedule F</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-variant: small-caps">Commercial Tort Claims</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 22.5pt; text-align: justify">None.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 22.5pt; text-align: justify">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The New Debtor hereby acknowledges
and agrees that the Secured Obligations are secured by all of the Collateral according to, and otherwise on and subject to, the
terms and conditions of the Security Agreement to the same extent and with the same force and effect as if the New Debtor had originally
been one of the Existing Debtors under the Security Agreement and had originally executed the same as such an Existing Debtor.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All capitalized terms used in
this Agreement without definition shall have the same meaning herein as such terms have in the Security Agreement, except that
any reference to the term &ldquo;Debtor&rdquo; or &ldquo;Debtors&rdquo; and any provision of the Security Agreement providing meaning
to such term shall be deemed a reference to the Existing Debtors and the New Debtor. Except as specifically modified hereby, all
of the terms and conditions of the Security Agreement shall stand and remain unchanged and in full force and effect.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<!-- Field: Page; Sequence: 6 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The New Debtor agrees to execute
and deliver such further instruments and documents and do such further acts and things as the Administrative Agent may deem necessary
or proper to carry out more effectively the purposes of this Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No reference to this Agreement
need be made in the Security Agreement or in any other document or instrument making reference to the Security Agreement, any reference
to the Security Agreement in any of such to be deemed a reference to the Security Agreement as modified hereby.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Agreement may be executed
in any number of counterparts, and by the different parties on different counterpart signature pages, all of which taken together
shall constitute one and the same agreement. Any of the parties hereto may execute this Agreement by signing any such counterpart
and each of such counterparts shall for all purposes be deemed to be an original. Delivery of a counterpart hereof by facsimile
transmission or by e-mail transmission of an Adobe portable document format file (also known as a &ldquo;PDF&rdquo; file) shall
be effective as delivery of a manually executed counterpart hereof. This Agreement shall be governed by and construed in accordance
with the law of the State of New York, without regard to conflicts of law provisions (other than Sections 5-1401 and 5-1402 of
the New York General Obligations law).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 7 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 121.5pt; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-align: center; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-align: left; text-indent: 0"><FONT STYLE="font-variant: small-caps">Limbach Holdings, Inc.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; text-align: left; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: left; text-indent: 0">By</TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>Scott Wright</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Scott Wright</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Corporate Secretary</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 121.5pt; text-align: center">&nbsp;</P>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Accepted and agreed
to as of the date first above written.</P>



<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding: 0; text-align: left; text-indent: 0"><FONT STYLE="font-variant: small-caps">Fifth Third Bank</FONT>, as Administrative Agent</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0; width: 50%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 3%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 5%">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0; width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: left; text-indent: 0">By </TD>
    <TD COLSPAN="2" STYLE="padding: 0; text-indent: 0"><U>S. Bradley McDougall</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="padding: 0; text-indent: 0">S. Bradley McDougall</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-align: right; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="padding: 0; text-indent: 0">Vice President</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">[Signature
Page to Assumption and Supplement to Security Agreement (Third Amendment)&mdash;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps">Limbach
Facility Services LLC]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<!-- Field: Page; Sequence: 8; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
