Single-Ply Roofing Systems

Comm. TPO Square 1

Single-ply membranes, used on commercial and industrial roofs, are factory manufactured sheet membranes that are generally categorized as thermoplastic or thermoset. These membranes can be installed three different ways: fully adhered, mechanically attached, or held down with ballast.

- Thermoplastic – materials can be repeatedly softened when heated and hardened when cooled

- Thermoset – materials solidify irreversibly after heating

1. Thermoplastic Polyolefin (TPO) is a single-ply roofing system. TPO roofing membranes were introduced to the Unites States in the early 1990’s. Since then, it has become one of the most popular commercial roofing membranes.

This system resists damage from UV light and chemicals and reflects sunlight. Membranes come in varying thicknesses to meet different requirements and is available in varying roll widths. Because of the wider sheets, the material is easier to install and there are less seams.

TPO is widely used as it is an economical choice that offers many of the same features of other systems. TPO is not prone to mold, dirt, or impact damage and is flexible enough to move with buildings as they settle over time.

2. Polyvinyl Chloride (PVC) is another popular single-ply roofing system. It is known for its durability and resistance to moisture, wind, fire, and chemicals. This makes it a popular choice for food manufacturers, restaurants, and aviation industries.

3. Ethylene Propylene Monomer (EPDM) is a single-ply membrane systems made from high performance synthetic rubber. It is designed to withstand UV light and extreme temperatures. Like TPO, it is flexible and accommodates building movements over time. Unlike its competitors, TPO and PVC, it is NOT heat welded.

At Guy Roofing, we are here to provide you with more information and answer any questions you may have about selecting the best roofing solution to meet your needs. Give us a call today at 800-771-0778 or visit