Azek Investor Presentation Deck

REVOLUTIONIZING OUTDOOR LIVING TO CREATE A MORE SUSTAINABLE FUTURE GROWTH UNDERPINNED BY ESG LEADERSHIP RECYCLING o ~400mm lbs. of waste diverted from landfills in 2020 through our recycle programs o ~99% of scrap generated at Wilmington, OH and Scranton, PA facilities is re-used o ~80% & ~50% of the content in our TimberTech capped composite and capped polymer decking, respectively, is recycled material SOCIAL o Committed to increase the minimum wage of hourly employees to $15 by the end of calendar '21 o Focus on Safety -45% improvement in reportable events since 2016 o ~50% executive team and ~40% Board member gender / ethnic diversity THE AZEK. COMPANY ALWAYS DO THE RIGHT THING BETTER TODAY THAN YESTERDAY TEAM WINS THE BEST STARTS WITH THE CUSTOMER AND ENDS THE AZEK COMPANY LEAD THROUGH INNOVATION Our Core Values Serve as Our 'True North' in Every Decision and Interaction VALUE EVERY INDIVIDUAL ENVIRONMENTAL o 9.2% decrease in our carbon intensity (tCO2e per $1 million net sales) from fiscal 2019 to fiscal 2020 o Majority of Residential products are recyclable at the end of life o TimberTech decking has a lower carbon footprint than its pine alternative according to the results of our peer reviewed Life Cycle Assessment GOVERNANCE o Formal Board oversight of sustainability and ESG o Separate Board Chairperson and CEO o ESG accountability added as a component of individual performance and compensation under our 2021 management annual incentive plan o Launched our Inaugural ESG Report in 2021 o United Nations Global Compact Signatory Our FULL-CIRCLE ESG Ambitions AZEK FULL-CIRCLE PRODUCTS. PEOPLE. PLANET. Reduce the Carbon Footprint Across The AZEK Company value chain and set ambitious targets in alignment with climate science Aspire to use ONE BILLION POUNDS Of recycled material annually by the end of 2026 Positively impact our employees, customers and communities through Purposeful & Inclusive Engagement 10

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