PVC, or polyvinyl chloride, roofing is composed of two layers of PVC roof material with polyester acting as a reinforcement between the layers. The layers also include additives that make the material UV-stable and flexible, while also preventing curing. Like EPDM and TPO, it is lightweight.
Ethylene propylene diene monomer (EPDM) roofing is commonly known as rubber roofing.
A thermoplastic polyolefin roof(TPO) has become a very popular option, especially among commercial building owners.