4 Reasons Single-Ply Membranes Cover Most Flat Roofs September 5, 2018 by Dior Construction Single-ply membranes are synonymous with flat roofs. Although thermosets, like EPDM, and thermoplastics, such as PVC and TPO, didn’t dominate the industry at first, they’ve been reigning supreme for decades for many reasons. [Read more…]