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  <xs:element id="jhx_LetterOfCreditAndBankGuaranteesMember" abstract="true" name="LetterOfCreditAndBankGuaranteesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="jhx_NumberOfMembersOnTheBoardOfDirectorsAlsoServingOnARelatedPartyBoardOfDirectors" abstract="false" name="NumberOfMembersOnTheBoardOfDirectorsAlsoServingOnARelatedPartyBoardOfDirectors" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="jhx_PurchaseObligationToBePaidNextFiveFiscalYears" abstract="false" name="PurchaseObligationToBePaidNextFiveFiscalYears" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="jhx_LeaseLiability" abstract="false" name="LeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="jhx_OperatingandFinanceLeaseLiabilityPaymentsDueNextTwelveMonths" abstract="false" name="OperatingandFinanceLeaseLiabilityPaymentsDueNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="jhx_FinanceLeaseLiabilityUndiscountedExcessAmountNotDisclosed" abstract="false" name="FinanceLeaseLiabilityUndiscountedExcessAmountNotDisclosed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_LesseeOperatingLeaseLiabilityUndiscountedExcessAmountNotDisclosed" abstract="false" name="LesseeOperatingLeaseLiabilityUndiscountedExcessAmountNotDisclosed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_LeaseRightOfUseAssetIncreaseDecreaseDueToRemeasurement" abstract="false" name="LeaseRightOfUseAssetIncreaseDecreaseDueToRemeasurement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_LeaseLiabilitiesIncreaseDecreaseDueToRemeasurement" abstract="false" name="LeaseLiabilitiesIncreaseDecreaseDueToRemeasurement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ChangeInActuarialEstimateAsbestosLiability" abstract="false" name="ChangeInActuarialEstimateAsbestosLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ChangeInActuarialEstimateInsuranceReceivables" abstract="false" name="ChangeInActuarialEstimateInsuranceReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ChangeInEstimateClaimsHandlingCosts" abstract="false" name="ChangeInEstimateClaimsHandlingCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ChangesInEstimates" abstract="false" name="ChangesInEstimates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosAdjustmentGainLossOnForeignExchange" abstract="false" name="AsbestosAdjustmentGainLossOnForeignExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_GainLossOnForeignCurrencyForwardsContractsAsbestos" abstract="false" name="GainLossOnForeignCurrencyForwardsContractsAsbestos" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="jhx_ScheduleOfAsbestosClaimsTable" abstract="true" name="ScheduleOfAsbestosClaimsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="jhx_DiscountedAndInflatedMember" abstract="true" name="DiscountedAndInflatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_UndiscountedButInflatedMember" abstract="true" name="UndiscountedButInflatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_UndiscountedAndUninflatedMember" abstract="true" name="UndiscountedAndUninflatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_AsbestosClaimsLineItems" abstract="true" name="AsbestosClaimsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_AsbestosLiabilityActuarialEstimate" abstract="false" name="AsbestosLiabilityActuarialEstimate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_RangeOfDiscountedActuarialEstimateMinimum" abstract="false" name="RangeOfDiscountedActuarialEstimateMinimum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_RangeOfDiscountedActuarialEstimateMaximum" abstract="false" name="RangeOfDiscountedActuarialEstimateMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_RangeOfUnDiscountedActuarialEstimateMinimum" abstract="false" name="RangeOfUnDiscountedActuarialEstimateMinimum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_RangeOfUnDiscountedActuarialEstimateMaximum" abstract="false" name="RangeOfUnDiscountedActuarialEstimateMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ScheduleOfAsbestosClaimsLineItems" abstract="true" name="ScheduleOfAsbestosClaimsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_DiscountedActuarialEstimatePotentialPeriodShift" abstract="false" name="DiscountedActuarialEstimatePotentialPeriodShift" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="jhx_DiscountedActuarialEstimatePotentialPercentIncrease" abstract="false" name="DiscountedActuarialEstimatePotentialPercentIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jhx_SecuredStandbyLoanFacilityMaximumBorrowingCapacity" abstract="false" name="SecuredStandbyLoanFacilityMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_SecuredStandbyLoanFacilityAmountOutstanding" abstract="false" name="SecuredStandbyLoanFacilityAmountOutstanding" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_LossContingencyPendingClaimsNumberRollForward" abstract="true" name="LossContingencyPendingClaimsNumberRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_LossContingencyNewDirectClaimsFiledNumber" abstract="false" name="LossContingencyNewDirectClaimsFiledNumber" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="jhx_LossContingencyNewCrossClaimsFiledNumber" abstract="false" name="LossContingencyNewCrossClaimsFiledNumber" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="jhx_AverageSettlementAmountPerSettledClaim" abstract="false" name="AverageSettlementAmountPerSettledClaim" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AverageSettlementAmountPerCaseClosed" abstract="false" name="AverageSettlementAmountPerCaseClosed" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_NetUnfundedAFFALiabilityNetofTaxMember" abstract="true" name="NetUnfundedAFFALiabilityNetofTaxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsMember" abstract="true" name="DeferredTaxAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_IncomeTaxPayableMember" abstract="true" name="IncomeTaxPayableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_NetUnfundedAFFALiabilityMember" abstract="true" name="NetUnfundedAFFALiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_AsbestosLiabilityMember" abstract="true" name="AsbestosLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_InsuranceReceivablesMember" abstract="true" name="InsuranceReceivablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_RestrictedCashAndInvestmentsMember" abstract="true" name="RestrictedCashAndInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_OtherAssetsAndLiabilitiesMember" abstract="true" name="OtherAssetsAndLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_AsbestosNetLiabilityRollForward" abstract="true" name="AsbestosNetLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_AsbestosNetLiability" abstract="false" name="AsbestosNetLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsNetAsbestosNoncurrent" abstract="false" name="DeferredTaxAssetsNetAsbestosNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_IncomeTaxPayableAsbestos" abstract="false" name="IncomeTaxPayableAsbestos" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosNetLiabilityNetTax" abstract="false" name="AsbestosNetLiabilityNetTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosNetClaimPaidAdjustment" abstract="false" name="AsbestosNetClaimPaidAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_PaymentsReceivedInAccordanceWithAmendedAndRestatedFinalFundingAgreement" abstract="false" name="PaymentsReceivedInAccordanceWithAmendedAndRestatedFinalFundingAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosInjuriesCompensationFundClaimsHandlingCostsIncurredPaid" abstract="false" name="AsbestosInjuriesCompensationFundClaimsHandlingCostsIncurredPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosInjuriesCompensationFundOperatingCostPaidNonClaimHandling" abstract="false" name="AsbestosInjuriesCompensationFundOperatingCostPaidNonClaimHandling" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosChangeInActuarialEstimate" abstract="false" name="AsbestosChangeInActuarialEstimate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ImpactOnDeferredIncomeTaxDueToChangeInActuarialEstimate" abstract="false" name="ImpactOnDeferredIncomeTaxDueToChangeInActuarialEstimate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_InsuranceRecoveriesAsbestosAdjustment" abstract="false" name="InsuranceRecoveriesAsbestosAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AmountOfDeferredTaxAssetsAppliedToIncomeTaxPayable" abstract="false" name="AmountOfDeferredTaxAssetsAppliedToIncomeTaxPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosLiabilityOtherChanges" abstract="false" name="AsbestosLiabilityOtherChanges" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ForeignExchangeGainLossInAsbestosLiability" abstract="false" name="ForeignExchangeGainLossInAsbestosLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_TimeDepositsJanuary272027MaturityDateMember" abstract="true" name="TimeDepositsJanuary272027MaturityDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_TimeDepositsOctober162026MaturityDateMember" abstract="true" name="TimeDepositsOctober162026MaturityDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_TimeDepositsJuly242026MaturityDateMember" abstract="true" name="TimeDepositsJuly242026MaturityDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_TimeDepositsApril72026MaturityDateMember" abstract="true" name="TimeDepositsApril72026MaturityDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNetOfTax" abstract="false" name="InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNetOfTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationForeignTaxesOnDomesticIncomeAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignTaxesOnDomesticIncomeAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationUnremittedEarningsBenefitAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationUnremittedEarningsBenefitAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationForeignTaxOnDomesticIncomePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignTaxOnDomesticIncomePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationUnremittedEarningsBenefitPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationUnremittedEarningsBenefitPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEffectOfForeignExchangeOnAsbestos" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEffectOfForeignExchangeOnAsbestos" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_EffectiveIncomeTaxRateReconciliationNetDeferredTaxRemeasurementAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationNetDeferredTaxRemeasurementAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsIntangibleAssets" abstract="false" name="DeferredTaxAssetsIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsTaxDeferredExpenseAsbestosLiability" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseAsbestosLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsOperatingLeaseLiabilities" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AsbestosRecognizedTaxDeduction" abstract="false" name="AsbestosRecognizedTaxDeduction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_PercentageOfValuationAllowanceAgainstForeignTaxCreditCarryForwards" abstract="false" name="PercentageOfValuationAllowanceAgainstForeignTaxCreditCarryForwards" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jhx_DeferredTaxAssetsTaxCreditCarryforwardsForeignSubjectToExpiration" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsForeignSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_IncomeTaxesReceivableCARESAct" abstract="false" name="IncomeTaxesReceivableCARESAct" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_LiabilityAwardsMember" abstract="true" name="LiabilityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_EquityAwardsMember" abstract="true" name="EquityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_AssumedEquityAwardsMember" abstract="true" name="AssumedEquityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_ReplacementServiceBasedStockOptionAwardsMember" abstract="true" name="ReplacementServiceBasedStockOptionAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_RestrictedStockUnitsAssumedAndReplacedMember" abstract="true" name="RestrictedStockUnitsAssumedAndReplacedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_CashSettledUnitsMember" abstract="true" name="CashSettledUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_AZEKAcquisitionMember" abstract="true" name="AZEKAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_A2020OmnibusIncentiveCompensationPlanMember" abstract="true" name="A2020OmnibusIncentiveCompensationPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueOfAwardsAssumedInBusinessCombination" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueOfAwardsAssumedInBusinessCombination" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueOfAwardsAssumedInBusinessCombinationRecognizedAsGoodwill" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueOfAwardsAssumedInBusinessCombinationRecognizedAsGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jhx_AverageClosingCommonStockPricePeriod" abstract="false" name="AverageClosingCommonStockPricePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="jhx_CSUAssumedAndReplacedMember" abstract="true" name="CSUAssumedAndReplacedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAvailableforGrantRollForward" abstract="true" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAvailableforGrantRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="jhx_August2024GrantMember" abstract="true" name="August2024GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_December2025GrantMember" abstract="true" name="December2025GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_October2025GrantMember" abstract="true" name="October2025GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_September2025GrantMember" abstract="true" name="September2025GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateStockPrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateStockPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="jhx_ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="jhx_ReclassificationOfForeignCurrencyTranslationAdjustmentsMember" abstract="true" name="ReclassificationOfForeignCurrencyTranslationAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_CorporateAndReconcilingItemsMember" abstract="true" name="CorporateAndReconcilingItemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_ReconciliationToConsolidatedNetIncomeAbstract" abstract="true" name="ReconciliationToConsolidatedNetIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jhx_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_ThresholdForIndividualPercentageOfNetSales" abstract="false" name="ThresholdForIndividualPercentageOfNetSales" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="jhx_ThresholdForIndividualPercentageOfLongLivedAssets" abstract="false" name="ThresholdForIndividualPercentageOfLongLivedAssets" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="jhx_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_SidingTrimAndDeckRailAccessoriesMember" abstract="true" name="SidingTrimAndDeckRailAccessoriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_DefinedContributionPlanMatchingTrancheAxis" abstract="true" name="DefinedContributionPlanMatchingTrancheAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="jhx_DefinedContributionPlanMatchingTrancheDomain" abstract="true" name="DefinedContributionPlanMatchingTrancheDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_DefinedContributionPlanMatchingTrancheOneMember" abstract="true" name="DefinedContributionPlanMatchingTrancheOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jhx_DefinedContributionPlanMatchingTrancheTwoMember" abstract="true" name="DefinedContributionPlanMatchingTrancheTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
