Westwood Village We used mechanically attached single-ply TPO over ¼ inch secure rock with a 20-year labor-and-materials warranty and a new Kynar 24 gauge with ANSI Clete. In total, this project was 120,000 square feet. Bryce HarbertAugust 5, 2018Single-Ply, Commercial Roofing Facebook0 Twitter LinkedIn0 Reddit Tumblr Pinterest0 0 Likes