<SEC-DOCUMENT>0001140361-14-026574.txt : 20140627
<SEC-HEADER>0001140361-14-026574.hdr.sgml : 20140627
<ACCEPTANCE-DATETIME>20140624171020
ACCESSION NUMBER:		0001140361-14-026574
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20140620
FILED AS OF DATE:		20140624
DATE AS OF CHANGE:		20140624

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTERFACE INC
		CENTRAL INDEX KEY:			0000715787
		STANDARD INDUSTRIAL CLASSIFICATION:	CARPETS AND RUGS [2273]
		IRS NUMBER:				581451243
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			0425

	BUSINESS ADDRESS:	
		STREET 1:		2859 PACES FERRY RD
		STREET 2:		STE 2000
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30339
		BUSINESS PHONE:		7704376800

	MAIL ADDRESS:	
		STREET 1:		2859 PACES FERRY RD
		STREET 2:		STE 2000
		CITY:			ATLANTA
		STATE:			2Q
		ZIP:			30339

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERFACE FLOORING SYSTEMS INC
		DATE OF NAME CHANGE:	19870817

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WELLS JOHN R
		CENTRAL INDEX KEY:			0001095555

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33994
		FILM NUMBER:		14938110

	MAIL ADDRESS:	
		STREET 1:		2859 PACES FERRY ROAD
		STREET 2:		SUITE 2000
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30339
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-06-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000715787</issuerCik>
        <issuerName>INTERFACE INC</issuerName>
        <issuerTradingSymbol>TILE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001095555</rptOwnerCik>
            <rptOwnerName>WELLS JOHN R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2859  PACES FERRY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>OVERLOOK III, SUITE 2000</rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30339</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. Vice President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2014-06-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3126</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.5561</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>231769</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2014-06-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2216</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.5081</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>229553</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The sales were effected pursuant to a Rule 10b5-1(c) trading plan adopted by the reporting person on May 7, 2014.</footnote>
        <footnote id="F2">Reflects a weighted average sale price of $18.5561. The shares were sold in multiple transactions at prices ranging from $18.50 to $18.67 per share, inclusive. The reporting person will provide to Interface, Inc., such security holder of Interface, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein and within the range set forth in footnote 4.</footnote>
        <footnote id="F3">A substantial number of such shares are restricted shares subject to a risk of forfeiture under certain circumstances.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.50 to $18.56 per share, inclusive.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ David B. Foshee, Attorney in Fact</signatureName>
        <signatureDate>2014-06-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
