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  <xs:element id="nx_RealEstateRelatedLeasesMember" abstract="true" name="RealEstateRelatedLeasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_LesseeLeaseTermOfContract" abstract="false" name="LesseeLeaseTermOfContract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nx_LeasesRightofUseAsset" abstract="false" name="LeasesRightofUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_LeasesLiability" abstract="false" name="LeasesLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_PatentsAndOtherTechnologyMember" abstract="true" name="PatentsAndOtherTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_NumberofReportableUnitswithGoodwillBalances" abstract="false" name="NumberofReportableUnitswithGoodwillBalances" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="nx_FiniteLivedIntangibleAssetsAmortizationExpenseAdjustment" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_Accruedotherbusinesstaxes" abstract="false" name="Accruedotherbusinesstaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_AccruedLiabilitiesFreight" abstract="false" name="AccruedLiabilitiesFreight" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_CapitalLeaseObligationsAndOtherMember" abstract="true" name="CapitalLeaseObligationsAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_TermSOFRLoansMember" abstract="true" name="TermSOFRLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_SwingLineMember" abstract="true" name="SwingLineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_CreditFacilityMember" abstract="true" name="CreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_InterestRateScenarioAxis" abstract="true" name="InterestRateScenarioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="nx_InterestRateScenarioDomain" abstract="true" name="InterestRateScenarioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_LessThanOneandOneHalfLeverageRatioMember" abstract="true" name="LessThanOneandOneHalfLeverageRatioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_GreaterThanThreeLeverageRatioMember" abstract="true" name="GreaterThanThreeLeverageRatioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_DebtInstrumentRequiredLeverageRatio" abstract="false" name="DebtInstrumentRequiredLeverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="nx_DebtInstrumentDebtDefaultInterestAccrualRate" abstract="false" name="DebtInstrumentDebtDefaultInterestAccrualRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_MinimumIncrementalBorrowing" abstract="false" name="MinimumIncrementalBorrowing" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_MaximumIncrementalBorrowing" abstract="false" name="MaximumIncrementalBorrowing" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DebtInstrumentLimitationonAnnualDividend" abstract="false" name="DebtInstrumentLimitationonAnnualDividend" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DebtInstrumentLeverageRatioThresholdforLimitationstoTakeEffect" abstract="false" name="DebtInstrumentLeverageRatioThresholdforLimitationstoTakeEffect" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="nx_DebtInstrumentLiquidityThresholdforLimitationstoTakeEffect" abstract="false" name="DebtInstrumentLiquidityThresholdforLimitationstoTakeEffect" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DebtInstrumentRequiredCoverageRatio" abstract="false" name="DebtInstrumentRequiredCoverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="nx_DebtInstrumentPeriodicPaymentPercentageOfPrincipal" abstract="false" name="DebtInstrumentPeriodicPaymentPercentageOfPrincipal" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_DebtInstrumentPrepay100OfTheNetCashProceedsOfTheIssuanceOrIncurrenceOfDebt" abstract="false" name="DebtInstrumentPrepay100OfTheNetCashProceedsOfTheIssuanceOrIncurrenceOfDebt" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_DebtInstrumentPrepay100OfTheNetCashProceedsOfSaleOfAssets" abstract="false" name="DebtInstrumentPrepay100OfTheNetCashProceedsOfSaleOfAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_BetweenOneandOneHalfandTwoandOneQuarterLeverageRatioMember" abstract="true" name="BetweenOneandOneHalfandTwoandOneQuarterLeverageRatioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_BetweenTwoandOneQuarterandThreeLeverageRatioMember" abstract="true" name="BetweenTwoandOneQuarterandThreeLeverageRatioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_RFRLoansMember" abstract="true" name="RFRLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_EurocurrencyRateLoansMember" abstract="true" name="EurocurrencyRateLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearOne" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearTwo" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearThree" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearFour" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearFive" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidAfterYearFive" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaidAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaid" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligationsToBePaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_FinanceLeaseLiabilityAndOtherFinancingObligations" abstract="false" name="FinanceLeaseLiabilityAndOtherFinancingObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_LongTermDebtAndCapitalLeaseObligationsGross" abstract="false" name="LongTermDebtAndCapitalLeaseObligationsGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationGoodwillPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationGoodwillPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationDeferredTrueUpPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationDeferredTrueUpPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationUKPatentBoxBenefitPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationUKPatentBoxBenefitPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationPermanentDifferences" abstract="false" name="EffectiveIncomeTaxRateReconciliationPermanentDifferences" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationTaxReturnToAccrualAdjustments" abstract="false" name="EffectiveIncomeTaxRateReconciliationTaxReturnToAccrualAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_EffectiveIncomeTaxRateReconciliationChangeInUncertainTaxPosition" abstract="false" name="EffectiveIncomeTaxRateReconciliationChangeInUncertainTaxPosition" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_DeferredTaxAssetsRightOfUseLiability" abstract="false" name="DeferredTaxAssetsRightOfUseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DeferredTaxAssetsResearchAndDevelopment" abstract="false" name="DeferredTaxAssetsResearchAndDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DeferredTaxLiabilitiesInvestmentsInForeignSubsidiaries" abstract="false" name="DeferredTaxLiabilitiesInvestmentsInForeignSubsidiaries" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_DeferredTaxLiabilitiesRightOfUseAsset" abstract="false" name="DeferredTaxLiabilitiesRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_AmountPurchasedUnderPurchaseObligations" abstract="false" name="AmountPurchasedUnderPurchaseObligations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_Cumulativeassetretirmentobligation" abstract="false" name="Cumulativeassetretirmentobligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_ProceedsOfDebtSecurityToSettleForeignPayables" abstract="false" name="ProceedsOfDebtSecurityToSettleForeignPayables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_TaxesAndFeesOnPurchaseOfDebtSecurityToSettleForeignPayables" abstract="false" name="TaxesAndFeesOnPurchaseOfDebtSecurityToSettleForeignPayables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_ShareBasedCompensationAwardTrancheFourMember" abstract="true" name="ShareBasedCompensationAwardTrancheFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_KeyEmployeesAndOfficersMember" abstract="true" name="KeyEmployeesAndOfficersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nx_Incometaxeffect" abstract="false" name="Incometaxeffect" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_ReturnOnNetAssets" abstract="false" name="ReturnOnNetAssets" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="nx_PaymentForSettlementOfShareBasedCompensation" abstract="false" name="PaymentForSettlementOfShareBasedCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_PerformanceSharesSettledinCash" abstract="false" name="PerformanceSharesSettledinCash" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nx_PensionServiceBenefit" abstract="false" name="PensionServiceBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_OtherForeignCountriesMember" abstract="true" name="OtherForeignCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_NAFenestrationMember" abstract="true" name="NAFenestrationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_EUFenestrationMember" abstract="true" name="EUFenestrationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_EarningsPerShareDisclosureTable" abstract="true" name="EarningsPerShareDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="nx_EarningsPerShareDisclosureLineItems" abstract="true" name="EarningsPerShareDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nx_GeorgeWilsonMember" abstract="true" name="GeorgeWilsonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
