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Just wanted to circle back in case this helps someone else. After comparing specs and talking with a couple suppliers, I ended up sticking with 4mm coroplast for 2–3 month real estate installs. It seems to handle Houston heat reasonably well as long as it’s properly staked and not oversized. PVC looks nicer, but I did see some comments about potential warping in prolonged high temps, especially with darker prints. For anyone else working in the Houston area, I came across this local signage page that shows the common material options being offered around here (coroplast, PVC, banners, aluminum, etc.), which helped me see what’s typically used for different outdoor applications: https://alphaimprint.net/signage-houston/ Might be useful if you're comparing materials for similar projects.