Exhibit 32.1
Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
In connection with the Annual Report on Form 10-K/A of The AZEK Company Inc., (the “Company”) for the period ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:
Date: June 14, 2024  | 
    
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    By:  | 
    /s/ Jesse Singh 
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    Jesse Singh  | 
   
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    Chief Executive Officer, President and Director (Principal Executive Officer)  |