1Q26 William Blair Composite Decking Survey Question Title * 1. Please identify yourself. Builder/Contractor Retailer Distributor Question Title * 2. Quarter growth (year-over-year)? Above 16% 16% to 12% 12% to 8% 8% to 4% 4% to 1% -1% to 1% -1% to -4% -4% to -8% -8% to -12% -12% to -16% Below -16% Question Title * 3. Has business remained the same / worsened / improved over the past quarter? Remained the same Declined Improved What is driving business conditions? Question Title * 4. Are you seeing more trade down to lower price point products? Select all that apply. Yes, lower price composite Yes, more wood No Question Title * 5. Is wood gaining share? Yes, I'm selling more wood decks. No, I'm selling less wood decks. No change Question Title * 6. Which do you mainly work with? Select all that apply. Trex TimberTech/Azek Fiberon Deckorators Other (please specify) Question Title * 7. Where are you buying from? Select all that apply Big box retail Lumberyard Two-step distributor Roofing distributor None of the above/not applicable Other (please specify) Question Title * 8. In the past year, have you changed which composite brands you mainly work with? Yes, to Trex Yes, to TimberTech/AZEK Yes to another No Question Title * 9. How have backlogs changed since last quarter? Backlog is down from last quarter Backlog hasn't changed from last quarter Backlog is up from last quarter Question Title * 10. Outlook for total growth in 2Q26? Above 16% 16% to 12% 12% to 8% 8% to 4% 4% to 1% -1% to 1% -1% to -4% -4% to -8% -8% to -12% -12% to -16% Below -16% Question Title * 11. Outlook for total growth in 2026? Above 16% 16% to 12% 12% to 8% 8% to 4% 4% to 1% -1% to 1% -1% to -4% -4% to -8% -8% to -12% -12% to -16% Below -16% Question Title * 12. Rotating Question part 1: Has Trex increased its rebate to you? Yes No N/A Question Title * 13. Rotating Question part 2: If so, has it caused you to install more Trex? Yes No N/A Question Title * 14. Thank you for your input.If you would like a copy of the results, please share your name and contact information. Name Company State/Province Email Address Phone Number Question Title * 15. I am interested in being called by William Blair to discuss my results. Yes Done