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<link:definition>1029 - Disclosure - Debt (Tables)</link:definition>
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<link:definition>1038 - Disclosure - Goodwill and Intangibles (Details)</link:definition>
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<link:definition>1040 - Disclosure - Debt (Details)</link:definition>
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<link:definition>1046 - Disclosure - Earnings per Share (Details)</link:definition>
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<link:definition>1048 - Disclosure - Income Taxes (Details)</link:definition>
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<link:definition>1049 - Disclosure - Income Taxes (Details 1)</link:definition>
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<link:definition>1050 - Disclosure - Income Taxes (Details Textual)</link:definition>
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<link:definition>1051 - Disclosure - Operating Segments (Details)</link:definition>
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<link:definition>1052 - Disclosure - Commitments and Contingencies (Details Textual)</link:definition>
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<link:definition>1053 - Disclosure - Self-Insurance (Details)</link:definition>
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<link:definition>1054 - Disclosure - Self-Insurance (Details Textual)</link:definition>
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<link:definition>1055 - Disclosure - Backlog (Details Textual)</link:definition>
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<link:definition>1056 - Disclosure - Management Incentive Plans (Details)</link:definition>
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<link:definition>1057 - Disclosure - Management Incentive Plans (Details Textual)</link:definition>
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<import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
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<import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
<import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
<import namespace="http://xbrl.sec.gov/currency/2017-01-31" schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd" />
<import namespace="http://xbrl.sec.gov/exch/2018-01-31" schemaLocation="https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd" />
<import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
<import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
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<element name="MarketBasedAwardsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_MarketBasedAwardsMember" substitutionGroup="xbrli:item" />
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<element name="GrossProfitWriteUp" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="lmb_GrossProfitWriteUp" substitutionGroup="xbrli:item" xbrli:balance="credit" />
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<element name="BacklogServiceMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_BacklogServiceMember" substitutionGroup="xbrli:item" />
<element name="FavorableLeaseholdInterestsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_FavorableLeaseholdInterestsMember" substitutionGroup="xbrli:item" />
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<element name="CreditAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_CreditAgreementMember" substitutionGroup="xbrli:item" />
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<element name="AmountRequiedToRemitDueToExcessCashFlow" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="lmb_AmountRequiedToRemitDueToExcessCashFlow" substitutionGroup="xbrli:item" xbrli:balance="credit" />
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<element name="IncreaseInNetWorthPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="lmb_IncreaseInNetWorthPercentage" substitutionGroup="xbrli:item" />
<element name="MinimumFixedChargeRatioActualRatio" type="xbrli:pureItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="lmb_MinimumFixedChargeRatioActualRatio" substitutionGroup="xbrli:item" />
<element name="MinimumFixedChargeRatioMinimumRequirement" type="xbrli:pureItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="lmb_MinimumFixedChargeRatioMinimumRequirement" substitutionGroup="xbrli:item" />
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<element name="SponsorWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_SponsorWarrantsMember" substitutionGroup="xbrli:item" />
<element name="FifteenDollarExercisePriceWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_FifteenDollarExercisePriceWarrantsMember" substitutionGroup="xbrli:item" />
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<element name="UnitPurchaseOptionsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_UnitPurchaseOptionsMember" substitutionGroup="xbrli:item" />
<element name="RestrictedStockUnitsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="lmb_RestrictedStockUnitsMember" substitutionGroup="xbrli:item" />
<element name="ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsForHalfShare" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="lmb_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsForHalfShare" substitutionGroup="xbrli:item" />
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<element name="PaymentToAcquireWorkersCompensationAndGeneralLiabilityInsurance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="lmb_PaymentToAcquireWorkersCompensationAndGeneralLiabilityInsurance" substitutionGroup="xbrli:item" xbrli:balance="credit" />
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