Azek IPO Presentation Deck

AZEK's Strategic Investments: 2017-2020 Significant multi-year investments driving sustained, long-term growth and profitability Accelerated Investments in Growth Strategic Margin Enhancement Plan -$60 million incremental capital investment over last 2 years ✓ Invested in downstream sales team and expanded marketing and retail teams Invested in Exteriors business ✓ Invested in new product capabilities and launched several successful new products ✓ THE AZEK COMPANY Invested in the TimberTech brand, downstream channels (Pro and Retail locations), consumer experience and digital capabilities Completed strategic acquisitions of Ultralox, Versatex and Return Polymers Invested in process-based team focused on continuous improvement Mapped out recycling vertical-integration strategy with significant cost savings Invested in upgraded manufacturing equipment to utilize recycled content and built in-house recycling capabilities >$40 million increase in annual SG&A investment since 2017 Added ~40 engineers and R&D team members since 2016 Added ~90 direct sellers since early 2016 11

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