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Here at West Roofing Systems, we’ve been installing Single-Ply Membrane Roofing for over 38 years. And in that time, one of the most common questions we’ve received from customers is, “What’s the difference between TPO and EPDM Single-Ply Membrane Roofing?”

We're sitting down with Ron Perdue (Technical Sales, West Roofing Systems) to discuss the differences between a TPO and an EPDM roof.

► WHAT ARE SINGLE-PLY MEMBRANE ROOF SYSTEMS?

Single-Ply Membranes are sheets of rubber and other synthetics that can be chemically adhered to insulation or ballasted creating a layer of protection on your commercial facility. When you are considering single-ply membrane roofing, there are two types of membrane to choose from: TPO and EPDM.

► TPO
Thermoplastic Polyolefin is a single-ply roofing membrane that is one of the fastest growing commercial roofing systems on the market. TPO roofing systems are made up of a single layer of synthetics and reinforcing scrim that can be used to cover flat roofs.

► EPDM
Ethylene Propylene Diene Monomer is a single-ply membrane that consists of a synthetic rubber compound that allows it to be flexible. EPDM has been used on commercial roofing facilities since the 1960's and is considered a time-tested option.


While both TPO and EPDM are membranes that are installed on top of the insulation, but there are slight differences that could affect your facility.

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West Roofing Systems, Inc. is the company of choice for installing quality, sustainable, silicone and spray polyurethane foam (SPF) roofing systems and wall coatings that waterproof, insulate, and protect commercial, school, and industrial buildings.

The turnkey operations provided by West Roofing Systems help reduce costs and streamline all phases of roofing and wall restoration projects, from initial inspection to the application of a durable silicone roof or wall coating system.

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