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Trex Co. Inc. – ‘10-K’ for 12/31/22 – ‘EX-101.SCH’

On:  Monday, 2/27/23, at 5:18pm ET   ·   For:  12/31/22   ·   Accession #:  1193125-23-51000   ·   File #:  1-14649

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/27/23  Trex Co. Inc.                     10-K       12/31/22   91:8.9M                                   Donnelley … Solutions/FA

Annual Report   —   Form 10-K

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.84M 
 2: EX-21       Subsidiaries List                                   HTML     24K 
 3: EX-23       Consent of Expert or Counsel                        HTML     25K 
 4: EX-31.1     Certification -- §302 - SOA'02                      HTML     30K 
 5: EX-31.2     Certification -- §302 - SOA'02                      HTML     30K 
 6: EX-32       Certification -- §906 - SOA'02                      HTML     26K 
12: R1          Cover Page                                          HTML     92K 
13: R2          Consolidated Statements of Comprehensive Income     HTML    100K 
14: R3          Consolidated Balance Sheets                         HTML    123K 
15: R4          Consolidated Balance Sheets (Parenthetical)         HTML     45K 
16: R5          Consolidated Statements of Changes in               HTML     73K 
                Stockholders' Equity                                             
17: R6          Consolidated Statements of Cash Flows               HTML    116K 
18: R7          Business and Organization                           HTML     30K 
19: R8          Summary of Significant Accounting Policies          HTML     79K 
20: R9          Sale of Trex Commercial Products, Inc.              HTML     31K 
21: R10         Inventories                                         HTML     38K 
22: R11         Prepaid Expenses and Other Assets                   HTML     35K 
23: R12         Goodwill and Other Intangible Assets, Net           HTML     34K 
24: R13         Property, Plant and Equipment                       HTML     43K 
25: R14         Accrued Expenses and Other Liabilities              HTML     38K 
26: R15         Debt                                                HTML     45K 
27: R16         Leases                                              HTML     52K 
28: R17         Financial Instruments                               HTML     28K 
29: R18         Stockholders' Equity                                HTML     63K 
30: R19         Revenue From Contracts With Customers               HTML     76K 
31: R20         Stock-Based Compensation                            HTML    122K 
32: R21         Employee Benefit Plans                              HTML     29K 
33: R22         Income Taxes                                        HTML     96K 
34: R23         Segment Information                                 HTML    123K 
35: R24         Seasonality                                         HTML     28K 
36: R25         Commitments and Contingencies                       HTML     61K 
37: R26         Schedule II - Valuation and Qualifying Accounts     HTML     57K 
                and Reserves                                                     
38: R27         Summary of Significant Accounting Policies          HTML    124K 
                (Policies)                                                       
39: R28         Summary of Significant Accounting Policies          HTML     31K 
                (Tables)                                                         
40: R29         Inventories (Tables)                                HTML     37K 
41: R30         Prepaid Expenses and Other Assets (Tables)          HTML     35K 
42: R31         Property, Plant and Equipment (Tables)              HTML     41K 
43: R32         Accrued Expenses and Other Liabilities (Tables)     HTML     37K 
44: R33         Leases (Tables)                                     HTML     53K 
45: R34         Stockholders' Equity (Tables)                       HTML     58K 
46: R35         Revenue From Contracts With Customers (Tables)      HTML     62K 
47: R36         Stock-Based Compensation (Tables)                   HTML    118K 
48: R37         Income Taxes (Tables)                               HTML     95K 
49: R38         Segment Information (Tables)                        HTML    116K 
50: R39         Commitments and Contingencies (Tables)              HTML     48K 
51: R40         Business and Organization - Additional Information  HTML     27K 
                (Detail)                                                         
52: R41         Summary of Significant Accounting Policies -        HTML    115K 
                Additional Information (Detail)                                  
53: R42         Summary of Significant Accounting Policies -        HTML     40K 
                Estimated Useful Lives of Property Plant and                     
                Equipment (Detail)                                               
54: R43         Sale of Trex Commercial Products, Inc. -            HTML     33K 
                Additional Information (Detail)                                  
55: R44         Inventories - Summary of Inventories (Detail)       HTML     35K 
56: R45         Inventories - Additional Information (Detail)       HTML     29K 
57: R46         Prepaid Expenses and Other Assets - Summary of      HTML     38K 
                Prepaid Expenses and Other Assets (Detail)                       
58: R47         Goodwill and Other Intangible Assets, Net -         HTML     51K 
                Additional Information (Detail)                                  
59: R48         Property, Plant and Equipment - Summary of          HTML     48K 
                Property, Plant and Equipment (Detail)                           
60: R49         Property, Plant and Equipment - Additional          HTML     32K 
                Information (Detail)                                             
61: R50         Accrued Expenses and Other Liabilities - Summary    HTML     44K 
                of Accrued Expenses and Other Liabilities (Detail)               
62: R51         Debt - Additional Information (Detail)              HTML     85K 
63: R52         Leases - Additional Information (Detail)            HTML     30K 
64: R53         Leases - Supplemental Cash flow Information to      HTML     41K 
                operating leases (Details)                                       
65: R54         Leases - Maturities of Operating Lease Liabilities  HTML     44K 
                (Details)                                                        
66: R55         Stockholders' Equity - Additional Information       HTML     31K 
                (Detail)                                                         
67: R56         Stockholders' Equity - Computation of Basic and     HTML     66K 
                Diluted Earnings Per Share (Detail)                              
68: R57         Stockholders' Equity - Antidilutive Securities      HTML     32K 
                Excluded from Computation of Earnings Per Share                  
                (Detail)                                                         
69: R58         Revenue From Contracts With Customers - Summary of  HTML     42K 
                Disaggregated Net Sales (Detail)                                 
70: R59         Stock-Based Compensation - Additional Information   HTML     69K 
                (Detail)                                                         
71: R60         Stock-Based Compensation - Summary of Stock-Based   HTML     37K 
                Compensation Expenses (Detail)                                   
72: R61         Stock-Based Compensation - Time-Based Restricted    HTML     48K 
                Stock and Restricted Stock Unit Activity (Detail)                
73: R62         Stock-Based Compensation - Performance-Based        HTML     48K 
                Restricted Stock Activity (Detail)                               
74: R63         Stock-Based Compensation - Summary of Assumptions   HTML     36K 
                Used to Estimate Fair Value of Each SAR (Detail)                 
75: R64         Stock-Based Compensation - SAR Activity (Detail)    HTML     68K 
76: R65         Employee Benefit Plans - Additional Information     HTML     27K 
                (Detail)                                                         
77: R66         Income Taxes - Income Tax Provision (Benefit)       HTML     49K 
                (Detail)                                                         
78: R67         Income Taxes - Reconciliation of Differences        HTML     43K 
                between Income Tax Provision and Income Tax                      
                Determined by Applying US Federal Statutory Rate                 
                (Detail)                                                         
79: R68         Income Taxes - Schedule of Deferred Tax Assets and  HTML     70K 
                Liabilities (Detail)                                             
80: R69         Income Taxes - Additional Information (Detail)      HTML     45K 
81: R70         Segment Information - Additional Information        HTML     38K 
                (Detail)                                                         
82: R71         Segment Information - Details of Segment            HTML     76K 
                Information (Detail)                                             
83: R72         Segment Information - Schedule of Reconciliation    HTML     58K 
                of Net Income to EBITDA (Detail)                                 
84: R73         Commitments and Contingencies - Additional          HTML     76K 
                Information (Detail)                                             
85: R74         Commitments and Contingencies - Summary of          HTML     39K 
                Reconciliation of Company's Residential Product                  
                Warranty Reserve (Detail)                                        
86: R75         Schedule II - Valuation and Qualifying Accounts     HTML     37K 
                and Reserves (Detail)                                            
89: XML         IDEA XML File -- Filing Summary                      XML    165K 
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88: EXCEL       IDEA Workbook of Financial Reports                  XLSX    161K 
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90: JSON        XBRL Instance as JSON Data -- MetaLinks              480±   739K 
91: ZIP         XBRL Zipped Folder -- 0001193125-23-051000-xbrl      Zip    442K

‘EX-101.SCH’   —   XBRL Schema — trex-20221231

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
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<link:roleType roleURI="http://www.trex.com/role/BusinessAndOrganizationAdditionalInformationDetail" id="BusinessAndOrganizationAdditionalInformationDetail">
<link:definition> 1040 - Disclosure - Business and Organization - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
<link:definition> 1041 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyPlantAndEquipmentDetail" id="SummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyPlantAndEquipmentDetail">
<link:definition> 1042 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Property Plant and Equipment (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SaleOfTrexCommercialProductsIncAdditionalInformationDetail" id="SaleOfTrexCommercialProductsIncAdditionalInformationDetail">
<link:definition> 1043 - Disclosure - Sale of Trex Commercial Products, Inc. - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/InventoriesSummaryOfInventoriesDetail" id="InventoriesSummaryOfInventoriesDetail">
<link:definition> 1044 - Disclosure - Inventories - Summary of Inventories (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/InventoriesAdditionalInformationDetail" id="InventoriesAdditionalInformationDetail">
<link:definition> 1045 - Disclosure - Inventories - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/PrepaidExpensesAndOtherAssetsSummaryOfPrepaidExpensesAndOtherAssetsDetail" id="PrepaidExpensesAndOtherAssetsSummaryOfPrepaidExpensesAndOtherAssetsDetail">
<link:definition> 1046 - Disclosure - Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/GoodwillAndOtherIntangibleAssetsNetAdditionalInformationDetail" id="GoodwillAndOtherIntangibleAssetsNetAdditionalInformationDetail">
<link:definition> 1047 - Disclosure - Goodwill and Other Intangible Assets, Net - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/PropertyPlantAndEquipmentSummaryOfPropertyPlantAndEquipmentDetail" id="PropertyPlantAndEquipmentSummaryOfPropertyPlantAndEquipmentDetail">
<link:definition> 1048 - Disclosure - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/PropertyPlantAndEquipmentAdditionalInformationDetail" id="PropertyPlantAndEquipmentAdditionalInformationDetail">
<link:definition> 1049 - Disclosure - Property, Plant and Equipment - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/AccruedExpensesAndOtherLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetail" id="AccruedExpensesAndOtherLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetail">
<link:definition> 1050 - Disclosure - Accrued Expenses and Other Liabilities - Summary of Accrued Expenses and Other Liabilities (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/DebtAdditionalInformationDetail" id="DebtAdditionalInformationDetail">
<link:definition> 1051 - Disclosure - Debt - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/LeasesAdditionalInformationDetail" id="LeasesAdditionalInformationDetail">
<link:definition> 1052 - Disclosure - Leases - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/LeasesSupplementalCashFlowInformationToOperatingLeasesDetails" id="LeasesSupplementalCashFlowInformationToOperatingLeasesDetails">
<link:definition> 1053 - Disclosure - Leases - Supplemental Cash flow Information to operating leases (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/LeasesMaturitiesOfOperatingLeaseLiabilitiesDetails" id="LeasesMaturitiesOfOperatingLeaseLiabilitiesDetails">
<link:definition> 1054 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockholdersEquityAdditionalInformationDetail" id="StockholdersEquityAdditionalInformationDetail">
<link:definition> 1055 - Disclosure - Stockholders' Equity - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockholdersEquityComputationOfBasicAndDilutedEarningsPerShareDetail" id="StockholdersEquityComputationOfBasicAndDilutedEarningsPerShareDetail">
<link:definition> 1056 - Disclosure - Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockholdersEquityAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetail" id="StockholdersEquityAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetail">
<link:definition> 1057 - Disclosure - Stockholders' Equity - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/RevenueFromContractsWithCustomersSummaryOfDisaggregatedNetSalesDetail" id="RevenueFromContractsWithCustomersSummaryOfDisaggregatedNetSalesDetail">
<link:definition> 1058 - Disclosure - Revenue From Contracts With Customers - Summary of Disaggregated Net Sales (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationAdditionalInformationDetail" id="StockBasedCompensationAdditionalInformationDetail">
<link:definition> 1059 - Disclosure - Stock-Based Compensation - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationSummaryOfStockBasedCompensationExpensesDetail" id="StockBasedCompensationSummaryOfStockBasedCompensationExpensesDetail">
<link:definition> 1060 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expenses (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationTimeBasedRestrictedStockAndRestrictedStockUnitActivityDetail" id="StockBasedCompensationTimeBasedRestrictedStockAndRestrictedStockUnitActivityDetail">
<link:definition> 1061 - Disclosure - Stock-Based Compensation - Time-Based Restricted Stock and Restricted Stock Unit Activity (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationPerformanceBasedRestrictedStockActivityDetail" id="StockBasedCompensationPerformanceBasedRestrictedStockActivityDetail">
<link:definition> 1062 - Disclosure - Stock-Based Compensation - Performance-Based Restricted Stock Activity (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationSummaryOfAssumptionsUsedToEstimateFairValueOfEachSarDetail" id="StockBasedCompensationSummaryOfAssumptionsUsedToEstimateFairValueOfEachSarDetail">
<link:definition> 1063 - Disclosure - Stock-Based Compensation - Summary of Assumptions Used to Estimate Fair Value of Each SAR (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/StockBasedCompensationSarActivityDetail" id="StockBasedCompensationSarActivityDetail">
<link:definition> 1064 - Disclosure - Stock-Based Compensation - SAR Activity (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/EmployeeBenefitPlansAdditionalInformationDetail" id="EmployeeBenefitPlansAdditionalInformationDetail">
<link:definition> 1065 - Disclosure - Employee Benefit Plans - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/IncomeTaxesIncomeTaxProvisionBenefitDetail" id="IncomeTaxesIncomeTaxProvisionBenefitDetail">
<link:definition> 1066 - Disclosure - Income Taxes - Income Tax Provision (Benefit) (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/IncomeTaxesReconciliationOfDifferencesBetweenIncomeTaxProvisionAndIncomeTaxDeterminedByApplyingUsFederalStatutoryRateDetail" id="IncomeTaxesReconciliationOfDifferencesBetweenIncomeTaxProvisionAndIncomeTaxDeterminedByApplyingUsFederalStatutoryRateDetail">
<link:definition> 1067 - Disclosure - Income Taxes - Reconciliation of Differences between Income Tax Provision and Income Tax Determined by Applying US Federal Statutory Rate (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail" id="IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail">
<link:definition> 1068 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/IncomeTaxesAdditionalInformationDetail" id="IncomeTaxesAdditionalInformationDetail">
<link:definition> 1069 - Disclosure - Income Taxes - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SegmentInformationAdditionalInformationDetail" id="SegmentInformationAdditionalInformationDetail">
<link:definition> 1070 - Disclosure - Segment Information - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SegmentInformationDetailsOfSegmentInformationDetail" id="SegmentInformationDetailsOfSegmentInformationDetail">
<link:definition> 1071 - Disclosure - Segment Information - Details of Segment Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/SegmentInformationScheduleOfReconciliationOfNetIncomeToEbitdaDetail" id="SegmentInformationScheduleOfReconciliationOfNetIncomeToEbitdaDetail">
<link:definition> 1072 - Disclosure - Segment Information - Schedule of Reconciliation of Net Income to EBITDA (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" id="CommitmentsAndContingenciesAdditionalInformationDetail">
<link:definition> 1073 - Disclosure - Commitments and Contingencies - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/CommitmentsAndContingenciesSummaryOfReconciliationOfCompanysResidentialProductWarrantyReserveDetail" id="CommitmentsAndContingenciesSummaryOfReconciliationOfCompanysResidentialProductWarrantyReserveDetail">
<link:definition> 1074 - Disclosure - Commitments and Contingencies - Summary of Reconciliation of Company's Residential Product Warranty Reserve (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/ScheduleIiValuationAndQualifyingAccountsAndReservesDetail" id="ScheduleIiValuationAndQualifyingAccountsAndReservesDetail">
<link:definition> 1075 - Disclosure - Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.trex.com/role/LeasesMaturitiesOfOperatingLeaseLiabilitiesDetailsAlternate1" id="LeasesMaturitiesOfOperatingLeaseLiabilitiesDetailsAlternate1">
<link:definition> 1076 - Statement - Leases - Maturities of Operating Lease Liabilities (Details) Alternate 1 </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
</link:roleType>
<link:linkbaseRef xlink:type="simple" xlink:href="trex-20221231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
<link:linkbaseRef xlink:type="simple" xlink:href="trex-20221231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
<link:linkbaseRef xlink:type="simple" xlink:href="trex-20221231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
<link:linkbaseRef xlink:type="simple" xlink:href="trex-20221231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
</appinfo>
</annotation>
<import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
<import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
<import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
<import namespace="http://fasb.org/us-gaap/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/country/2022" schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/currency/2022" schemaLocation="https://xbrl.sec.gov/currency/2022/currency-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/exch/2022" schemaLocation="https://xbrl.sec.gov/exch/2022/exch-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/naics/2022" schemaLocation="https://xbrl.sec.gov/naics/2022/naics-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/sic/2022" schemaLocation="https://xbrl.sec.gov/sic/2022/sic-2022.xsd"/>
<import namespace="http://xbrl.sec.gov/stpr/2022" schemaLocation="https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd"/>
<import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
<import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd"/>
<import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd"/>
<import namespace="http://xbrl.sec.gov/dei/2022" schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd"/>
<import namespace="http://fasb.org/us-types/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd"/>
<import namespace="http://fasb.org/srt-types/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd"/>
<import namespace="http://fasb.org/srt/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd"/>
<import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
<import namespace="http://fasb.org/us-gaap-sup/2022q3" schemaLocation="https://xbrl.fasb.org/us-gaap/2022q3/us-gaap-sup-2022q3.xsd"/>
<import namespace="http://fasb.org/srt-sup/2022q3" schemaLocation="https://xbrl.fasb.org/srt/2022q3/srt-sup-2022q3.xsd"/>
<element name="AccruedLiabilitiesAndOtherLiabilitiesCurrentExcludingWarranty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_AccruedLiabilitiesAndOtherLiabilitiesCurrentExcludingWarranty" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="CapitalExpendituresInAccountsPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_CapitalExpendituresInAccountsPayable" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="ScheduleOfDivestureOfInterestsInSubsidiaryAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfDivestureOfInterestsInSubsidiaryAbstract" substitutionGroup="xbrli:item"/>
<element name="TrexCommercialProductsIncMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_TrexCommercialProductsIncMember" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfDivestureOfInterestsInSubsidiaryTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfDivestureOfInterestsInSubsidiaryTextBlock" substitutionGroup="xbrli:item"/>
<element name="PrepaidAndOtherCurrentAssetsDisclosureTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_PrepaidAndOtherCurrentAssetsDisclosureTextBlock" substitutionGroup="xbrli:item"/>
<element name="SeasonalityDisclosureTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_SeasonalityDisclosureTextBlock" substitutionGroup="xbrli:item"/>
<element name="InsuranceProceedsPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_InsuranceProceedsPolicyTextBlock" substitutionGroup="xbrli:item"/>
<element name="PropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_PropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock" substitutionGroup="xbrli:item"/>
<element name="PrepaidExpenseAndOtherAssetsCurrentTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_PrepaidExpenseAndOtherAssetsCurrentTableTextBlock" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfAccruedLiabilitiesAndOtherCurrentLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfAccruedLiabilitiesAndOtherCurrentLiabilitiesTableTextBlock" substitutionGroup="xbrli:item"/>
<element name="SupplementalFinancialInformationOfOperatingLeasesTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_SupplementalFinancialInformationOfOperatingLeasesTableTextBlock" substitutionGroup="xbrli:item"/>
<element name="TimeBasedRestrictedStockAndTimeBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_TimeBasedRestrictedStockAndTimeBasedRestrictedStockUnitsMember" substitutionGroup="xbrli:item"/>
<element name="PerformanceBasedRestrictedStockAndPerformanceBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_PerformanceBasedRestrictedStockAndPerformanceBasedRestrictedStockUnitsMember" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfReconciliationOfNetIncomeToEBITDATableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfReconciliationOfNetIncomeToEBITDATableTextBlock" substitutionGroup="xbrli:item"/>
<element name="AccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_AccountingPoliciesTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="CustomerTwoMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_CustomerTwoMember" substitutionGroup="xbrli:item"/>
<element name="CustomerOneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_CustomerOneMember" substitutionGroup="xbrli:item"/>
<element name="RawMaterialsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RawMaterialsMember" substitutionGroup="xbrli:item"/>
<element name="CommercialUseMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_CommercialUseMember" substitutionGroup="xbrli:item"/>
<element name="ResidentialUseMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ResidentialUseMember" substitutionGroup="xbrli:item"/>
<element name="TranscendDeckingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_TranscendDeckingMember" substitutionGroup="xbrli:item"/>
<element name="SelectDeckingAndUniversalFasciaMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SelectDeckingAndUniversalFasciaMember" substitutionGroup="xbrli:item"/>
<element name="EnhanceDeckingAndTranscendSelectEnhanceAndSignatureRailingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_EnhanceDeckingAndTranscendSelectEnhanceAndSignatureRailingMember" substitutionGroup="xbrli:item"/>
<element name="SignatureRailingAndTranscendCladdingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SignatureRailingAndTranscendCladdingMember" substitutionGroup="xbrli:item"/>
<element name="SignatureRailingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SignatureRailingMember" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfSignificantAccountingPoliciesLineItems" substitutionGroup="xbrli:item"/>
<element name="MaturityPeriodOfCashEquivalent" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_MaturityPeriodOfCashEquivalent" substitutionGroup="xbrli:item"/>
<element name="NumberOfCustomerAccountedForTenPercentOrMoreAccountReceivable" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfCustomerAccountedForTenPercentOrMoreAccountReceivable" substitutionGroup="xbrli:item"/>
<element name="NumberOfFinancialInstitutionWithDeposit" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfFinancialInstitutionWithDeposit" substitutionGroup="xbrli:item"/>
<element name="NumberOfLargestRawMaterialSuppliers" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfLargestRawMaterialSuppliers" substitutionGroup="xbrli:item"/>
<element name="NumberOfCustomerAccountedForTenPercentOrMoreSalesOfNetSales" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfCustomerAccountedForTenPercentOrMoreSalesOfNetSales" substitutionGroup="xbrli:item"/>
<element name="ValuationAllowanceForCreditLossesAndDisputedAmounts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ValuationAllowanceForCreditLossesAndDisputedAmounts" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="WarrantyPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_WarrantyPeriod" substitutionGroup="xbrli:item"/>
<element name="DescriptionOfOperatingLeasesWithInitialTerm" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_DescriptionOfOperatingLeasesWithInitialTerm" substitutionGroup="xbrli:item"/>
<element name="GainLossOnInsuranceSettlement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_GainLossOnInsuranceSettlement" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="RailingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RailingMember" substitutionGroup="xbrli:item"/>
<element name="StagingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_StagingMember" substitutionGroup="xbrli:item"/>
<element name="FourLargestSuppliersMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_FourLargestSuppliersMember" substitutionGroup="xbrli:item"/>
<element name="FireAtVirginiaFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_FireAtVirginiaFacilityMember" substitutionGroup="xbrli:item"/>
<element name="ForkliftsAndTractorsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ForkliftsAndTractorsMember" substitutionGroup="xbrli:item"/>
<element name="AccruedManufacturingExpensesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_AccruedManufacturingExpensesCurrent" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="BillingsInExcessOfRevenuesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_BillingsInExcessOfRevenuesCurrent" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="RevolverLoansPortionEffectiveOneJanuaryThroughThirtyJuneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RevolverLoansPortionEffectiveOneJanuaryThroughThirtyJuneMember" substitutionGroup="xbrli:item"/>
<element name="RevolverLoansPortionEffectiveOneJulyThroughThirtyFirstDecemberMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RevolverLoansPortionEffectiveOneJulyThroughThirtyFirstDecemberMember" substitutionGroup="xbrli:item"/>
<element name="RevolvingBLoanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RevolvingBLoanMember" substitutionGroup="xbrli:item"/>
<element name="LineOfCreditFacilityAdditionalBorrowingCapacity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_LineOfCreditFacilityAdditionalBorrowingCapacity" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="NumberOfBusinessDaysWithinWhichLenderMayRaiseObjectionsToAmendment" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfBusinessDaysWithinWhichLenderMayRaiseObjectionsToAmendment" substitutionGroup="xbrli:item"/>
<element name="FourthamendedandrestatedcreditagreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_FourthamendedandrestatedcreditagreementMember" substitutionGroup="xbrli:item"/>
<element name="AgreementAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_AgreementAxis" substitutionGroup="xbrldt:dimensionItem"/>
<element name="AgreementDomain" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_AgreementDomain" substitutionGroup="xbrli:item"/>
<element name="FifthAmendmentAndRestatedAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_FifthAmendmentAndRestatedAgreementMember" substitutionGroup="xbrli:item"/>
<element name="CreditFacilityOneAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_CreditFacilityOneAxis" substitutionGroup="xbrldt:dimensionItem"/>
<element name="CreditFacilityOneDomain" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_CreditFacilityOneDomain" substitutionGroup="xbrli:item"/>
<element name="SwinglineLetterOfCreditMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SwinglineLetterOfCreditMember" substitutionGroup="xbrli:item"/>
<element name="SupplementalBalanceSheetInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SupplementalBalanceSheetInformationAbstract" substitutionGroup="xbrli:item"/>
<element name="LesseeOperatingLeasesAccruedExpensesAndOtherCurrentLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_LesseeOperatingLeasesAccruedExpensesAndOtherCurrentLiabilities" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="StockRepurchaseProgramMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_StockRepurchaseProgramMember" substitutionGroup="xbrli:item"/>
<element name="ComponentsOfBasicAndDilutedEarningPerShareTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ComponentsOfBasicAndDilutedEarningPerShareTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ComponentsOfBasicAndDilutedEarningPerShareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ComponentsOfBasicAndDilutedEarningPerShareLineItems" substitutionGroup="xbrli:item"/>
<element name="StockAppreciationRightsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_StockAppreciationRightsMember" substitutionGroup="xbrli:item"/>
<element name="EmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_EmployeeStockPurchasePlanMember" substitutionGroup="xbrli:item"/>
<element name="TwoThousandFourteenStockIncentivePlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_TwoThousandFourteenStockIncentivePlanMember" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionGrantsInPeriodWeightedAverageGrantDateFairValuePerPricingModel" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionGrantsInPeriodWeightedAverageGrantDateFairValuePerPricingModel" substitutionGroup="xbrli:item"/>
<element name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageToTargetNumberOfShares" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageToTargetNumberOfShares" substitutionGroup="xbrli:item"/>
<element name="StockIssuedSharesEmployeeStockPurchasePlan" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_StockIssuedSharesEmployeeStockPurchasePlan" substitutionGroup="xbrli:item"/>
<element name="PerformanceBasedRestrictedStockAndrestrictedStockunitsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_PerformanceBasedRestrictedStockAndrestrictedStockunitsMember" substitutionGroup="xbrli:item"/>
<element name="TimeBasedRestrictedStockandRestrictedstockUnitsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_TimeBasedRestrictedStockandRestrictedstockUnitsMember" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfRestrictedStockActivityTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfRestrictedStockActivityTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ScheduleOfRestrictedStockActivityLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfRestrictedStockActivityLineItems" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyLineItems" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfStockAppreciationRightsActivityTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfStockAppreciationRightsActivityTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ScheduleOfStockAppreciationRightsActivityLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfStockAppreciationRightsActivityLineItems" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsGrantedWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsGrantedWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsOutstandingWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsOutstandingWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsVestedWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsVestedWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsCanceledWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsCanceledWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="SharebasedCompensationArrangementByShareBasedPaymentAwardNonoptionEquityInstrumentsVested" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_SharebasedCompensationArrangementByShareBasedPaymentAwardNonoptionEquityInstrumentsVested" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisedWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisedWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableIntrinsicValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableIntrinsicValue" substitutionGroup="xbrli:item" xbrli:balance="debit"/>
<element name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm" substitutionGroup="xbrli:item"/>
<element name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisableWeightedAverageGrantPrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisableWeightedAverageGrantPrice" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxLiabilitiesDepreciation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxLiabilitiesDepreciation" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="DeferredTaxLiabilitiesGoodwillAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxLiabilitiesGoodwillAmortization" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="DeferredTaxLiabilitiesInventoriesAndOther" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxLiabilitiesInventoriesAndOther" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="DeferredTaxAssetsOperatingLeaseLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxAssetsOperatingLeaseLiabilities" substitutionGroup="xbrli:item" xbrli:balance="debit"/>
<element name="DeferredTaxAssetsGoodwillAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxAssetsGoodwillAmortization" substitutionGroup="xbrli:item" xbrli:balance="debit"/>
<element name="DeferredTaxAssetsTaxCutAndJobsActCapitalizationOfResearchAndDevelopmentCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_DeferredTaxAssetsTaxCutAndJobsActCapitalizationOfResearchAndDevelopmentCosts" substitutionGroup="xbrli:item" xbrli:balance="debit"/>
<element name="UnrecognizedTaxBenefitsNumberOfTaxMattersIdentified" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_UnrecognizedTaxBenefitsNumberOfTaxMattersIdentified" substitutionGroup="xbrli:item"/>
<element name="NumberOfSalesRetailers" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_NumberOfSalesRetailers" substitutionGroup="xbrli:item"/>
<element name="CapitalExpenditure" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_CapitalExpenditure" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="EBITDA" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_EBITDA" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="ScheduleOfCommitmentsAndContingenciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfCommitmentsAndContingenciesTable" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ResidentialAndCommercialUseMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ResidentialAndCommercialUseMember" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfCommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ScheduleOfCommitmentsAndContingenciesLineItems" substitutionGroup="xbrli:item"/>
<element name="AveragePeriodForPeMaterialPurchasesUnderShortTermSupplyContractsForWhichPricingIsNegotiatedAsNeeded" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_AveragePeriodForPeMaterialPurchasesUnderShortTermSupplyContractsForWhichPricingIsNegotiatedAsNeeded" substitutionGroup="xbrli:item"/>
<element name="PercentSensitivityChangeInExpectedSurfaceFlakingClaims" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="trex_PercentSensitivityChangeInExpectedSurfaceFlakingClaims" substitutionGroup="xbrli:item"/>
<element name="SensitivityChangeInSurfaceFlakingWarrantyReserve" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="trex_SensitivityChangeInSurfaceFlakingWarrantyReserve" substitutionGroup="xbrli:item" xbrli:balance="credit"/>
<element name="RawMaterialSupplyContractsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_RawMaterialSupplyContractsMember" substitutionGroup="xbrli:item"/>
<element name="SurfaceFlakingWarrantyReserveMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SurfaceFlakingWarrantyReserveMember" substitutionGroup="xbrli:item"/>
<element name="ProductsSoldOnOrAfterJanuaryOneTwoThousandAndTwentyThreeMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ProductsSoldOnOrAfterJanuaryOneTwoThousandAndTwentyThreeMember" substitutionGroup="xbrli:item"/>
<element name="ProductsSoldPriorToJanuaryOneTwoThousandAndTwentyThreeMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_ProductsSoldPriorToJanuaryOneTwoThousandAndTwentyThreeMember" substitutionGroup="xbrli:item"/>
<element name="SurfaceFlakingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_SurfaceFlakingMember" substitutionGroup="xbrli:item"/>
<element name="OtherResidentialMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="trex_OtherResidentialMember" substitutionGroup="xbrli:item"/>
</schema>

3 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/26/24  Trex Co. Inc.                     10-K       12/31/23   95:8.6M                                   Donnelley … Solutions/FA
 5/22/23  SEC                               UPLOAD6/21/23    2:39K  Trex Co. Inc.
 4/13/23  SEC                               UPLOAD6/21/23    2:43K  Trex Co. Inc.

22 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

12/30/22  Trex Co. Inc.                     8-K:1,2,7,912/30/22   12:573K                                   Donnelley … Solutions/FA
12/23/22  Trex Co. Inc.                     8-K:1,9    12/22/22   11:1.1M                                   Donnelley … Solutions/FA
 7/12/22  Trex Co. Inc.                     8-K:1,9     7/07/22   11:13M                                    Donnelley … Solutions/FA
 5/20/22  Trex Co. Inc.                     8-K:1,9     5/18/22   17:1.5M                                   Donnelley … Solutions/FA
 5/09/22  Trex Co. Inc.                     10-Q        3/31/22   75:4.4M                                   Donnelley … Solutions/FA
 2/28/22  Trex Co. Inc.                     10-K       12/31/21   99:9.4M                                   Donnelley … Solutions/FA
 8/02/21  Trex Co. Inc.                     10-Q        6/30/21   75:5.2M                                   Donnelley … Solutions/FA
 2/22/21  Trex Co. Inc.                     10-K       12/31/20   98:8.9M                                   Donnelley … Solutions/FA
11/02/20  Trex Co. Inc.                     10-Q        9/30/20   77:6.2M                                   Donnelley … Solutions/FA
 5/28/20  Trex Co. Inc.                     8-K:1,9     5/26/20   13:1.2M                                   Donnelley … Solutions/FA
 2/25/20  Trex Co. Inc.                     8-K:1,5,9   2/21/20   13:364K                                   Donnelley … Solutions/FA
11/06/19  Trex Co. Inc.                     8-K:1,9    11/05/19   16:1.3M                                   Donnelley … Solutions/FA
 7/29/19  Trex Co. Inc.                     10-Q        6/30/19   80:7.8M                                   Donnelley … Solutions/FA
 5/01/19  Trex Co. Inc.                     8-K:5,9     5/01/19    3:108K                                   Donnelley … Solutions/FA
 2/14/19  Trex Co. Inc.                     10-K       12/31/18   99:6.1M                                   Donnelley … Solutions/FA
 5/07/18  Trex Co. Inc.                     10-Q        3/31/18   77:3.1M                                   Donnelley … Solutions/FA
 2/21/17  Trex Co. Inc.                     10-K       12/31/16   84:5.6M                                   Donnelley … Solutions/FA
 8/03/15  Trex Co. Inc.                     10-Q        6/30/15   56:2.2M                                   Donnelley … Solutions/FA
 5/08/15  Trex Co. Inc.                     10-Q        3/31/15   55:2.4M                                   Donnelley … Solutions/FA
 3/12/09  Trex Co. Inc.                     10-K       12/31/08   13:1.1M                                   Donnelley … Solutions/FA
11/09/06  Trex Co. Inc.                     10-Q        9/30/06    8:350K                                   Donnelley … Solutions/FA
 3/24/99  Trex Co. Inc.                     S-1/A                 11:523K                                   Donnelley Fin’l S… 09/FA
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