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  <xsd:element id="nx_DefinedBenefitPlanExpectedFutureBenefitPayments" name="DefinedBenefitPlanExpectedFutureBenefitPayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="nx_DefinedBenefitPlanFundedUnfundedStatusofPlan" name="DefinedBenefitPlanFundedUnfundedStatusofPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
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  <xsd:element abstract="true" id="nx_EarningsPerShareDisclosureLineItems" name="EarningsPerShareDisclosureLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_EarningsPerShareDisclosureTable" name="EarningsPerShareDisclosureTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_EffectiveIncomeTaxRateReconciliationImpactofGILTIandFDII" name="EffectiveIncomeTaxRateReconciliationImpactofGILTIandFDII" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_EffectiveIncomeTaxRateReconciliationImpactofTaxReform" name="EffectiveIncomeTaxRateReconciliationImpactofTaxReform" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_EffectiveIncomeTaxRateReconciliationStockBasedCompensation" name="EffectiveIncomeTaxRateReconciliationStockBasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nx_FenestrationMember" name="FenestrationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_GreaterThanThreeLeverageRatioMember" name="GreaterThanThreeLeverageRatioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_HLPMember" name="HLPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_HighqualitycorebondMember" name="HighqualitycorebondMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_HighyieldbondMember" name="HighyieldbondMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_Incometaxeffect" name="Incometaxeffect" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_InterestRateScenarioAxis" name="InterestRateScenarioAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_InterestRateScenarioDomain" name="InterestRateScenarioDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_InternationalEquityMember" name="InternationalEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_InternationalMember" name="InternationalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_InventoryAccountingChangeTableTextBlock" name="InventoryAccountingChangeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_InventoryReserveRollforwardTableTextBlock" name="InventoryReserveRollforwardTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_LargeCapitalizationMember" name="LargeCapitalizationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_LessThanOneandOneHalfLeverageRatioMember" name="LessThanOneandOneHalfLeverageRatioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_LineofCreditFacilityMaximumBorrowingCapacityCommittedAmount" name="LineofCreditFacilityMaximumBorrowingCapacityCommittedAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="nx_MaximumIncrementalBorrowing" name="MaximumIncrementalBorrowing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="nx_MinimumIncrementalBorrowing" name="MinimumIncrementalBorrowing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="nx_NACabinetComponentsMember" name="NACabinetComponentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_NAEngineeredComponentsMember" name="NAEngineeredComponentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_NAEngineeredComponentsUnitOneMemberMember" name="NAEngineeredComponentsUnitOneMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_NAEngineeredComponentsUnitTwoMember" name="NAEngineeredComponentsUnitTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_Netdeferredtaxassetsnetofuncertaintaxpositions" name="Netdeferredtaxassetsnetofuncertaintaxpositions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
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  <xsd:element id="nx_NumberofReportableUnitswithGoodwillBalances" name="NumberofReportableUnitswithGoodwillBalances" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="nx_OtherAssetCategoryMember" name="OtherAssetCategoryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_OtherForeignCountriesMember" name="OtherForeignCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_OtherNonOperatingIncomeLossMember" name="OtherNonOperatingIncomeLossMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_PatentsAndOtherTechnologyMember" name="PatentsAndOtherTechnologyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_PensionServiceBenefit" name="PensionServiceBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="nx_PercentageOfEmployeesIncludedInPlan" name="PercentageOfEmployeesIncludedInPlan" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_PerformanceRestrictedStockUnitsMember" name="PerformanceRestrictedStockUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_PerformanceSharesCashSettlements" name="PerformanceSharesCashSettlements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_PerformanceSharesExpectedtoVest" name="PerformanceSharesExpectedtoVest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="nx_PerformanceSharesSettledinCash" name="PerformanceSharesSettledinCash" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_PerformanceSharesSettledinStock" name="PerformanceSharesSettledinStock" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_Postretirementdefinedbenefitplanscurrentliabilities" name="Postretirementdefinedbenefitplanscurrentliabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
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  <xsd:element abstract="true" id="nx_PrepaidAndOtherCurrentAssetsMember" name="PrepaidAndOtherCurrentAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ProductWarrantyAxis" name="ProductWarrantyAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ProductWarrantyDomain" name="ProductWarrantyDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_PropertyAssetsUsefulLifeTableTextBlock" name="PropertyAssetsUsefulLifeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_RelativeTotalShareReturn" name="RelativeTotalShareReturn" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_Retirementoffullyamortizedintangibleassets" name="Retirementoffullyamortizedintangibleassets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SellCADMember" name="SellCADMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SellEURMember" name="SellEURMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SellGBPMember" name="SellGBPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesGreaterThanOrEqualTo50PercentMember" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesGreaterThanOrEqualTo50PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan20PercentAndGreaterThanOrEqualToNegative20PercentMember" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan20PercentAndGreaterThanOrEqualToNegative20PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan50PercentAndGreaterThanOrEqualTo20PercentMember" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan50PercentAndGreaterThanOrEqualTo20PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThanNegative20PercentMember" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThanNegative20PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaAxis" name="ShareBasedCompensationAwardPerformanceCriteriaAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardPerformanceCriteriaDomain" name="ShareBasedCompensationAwardPerformanceCriteriaDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_ShareBasedCompensationAwardTrancheFourMember" name="ShareBasedCompensationAwardTrancheFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesRollForward" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SmallcapitilizationMember" name="SmallcapitilizationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_StockIssuedDuringPeriodTreasurySharesPerformanceSharesVested" name="StockIssuedDuringPeriodTreasurySharesPerformanceSharesVested" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="nx_StockIssuedDuringPeriodValuePerformanceSharesVested" name="StockIssuedDuringPeriodValuePerformanceSharesVested" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_SwingLineMember" name="SwingLineMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nx_TaxCutsandJobsActof2017ChangeinTaxRateIncomeTaxExpenseBenefit" name="TaxCutsandJobsActof2017ChangeinTaxRateIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="nx_TaxCutsandJobsActof2017ExcessTaxBenefits" name="TaxCutsandJobsActof2017ExcessTaxBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="nx_TaxCutsandJobsActof2017GILTIandFDII" name="TaxCutsandJobsActof2017GILTIandFDII" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="nx_TaxCutsandJobsActof2017TransitionTaxforAccumulatedForeignEarningsIncomeTaxExpenseBenefit" name="TaxCutsandJobsActof2017TransitionTaxforAccumulatedForeignEarningsIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="nx_TaxCutsandJobsActof2017TrueUpOfAccruedTaxes" name="TaxCutsandJobsActof2017TrueUpOfAccruedTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_TermLoanFacilityMember" name="TermLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_TradenamesAndTrademarksMember" name="TradenamesAndTrademarksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_TreasuryStockSharesMember" name="TreasuryStockSharesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_UnrecognizedTaxBenefitsRollForward" name="UnrecognizedTaxBenefitsRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nx_WoodcraftMember" name="WoodcraftMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
