Single-ply roofing systems are applied in one layer and are either thermoplastic or thermoset. There are various types of single-ply membranes including:
EDPM (ethylene propylene diene terpolymer): This type of membrane is made from synthetic rubber. EDPM roofs are black, flexible, and require little maintenance.
TPO (thermoplastic olefin): TPO roofing systems are heat welded and have a white reflective surface that can reduce cooling costs.
PVC (poly vinyl carbonate): PVC systems are similar to TPO, but are more appropriate for use where there is exposure to chemicals, grease, oils, or fuels. This type of roof is easy to install and is heat welded.