An EPDM rubber roof is the most popular and economical single‐ply roofing membrane that has been in wide use for over 40 years. EPDM (ethylene propylene diene monomer) is a type of synthetic rubber. This rubber is made up mostly of oil (carbo‐hydrate) based by‐products with modifiers and stabilizers added to extend its service life. An EPDM roof has a solid reputation for durability. It is recognized in the industry as a dependable roofing material that offers resistance against ultraviolet light, ozone, oxidants and severe weather conditions.
TPO is one of the most common types of thermoplastic membranes and is environmentally friendly. It is composed of polypropylene and ethylene propylene polymers reinforced with polyester. TPO roofs are flame-retardant and UV-resistant. It is also recognized in the industry as a dependable roofing material that offers resistance against ultraviolet light, ozone, oxidants and severe weather conditions. TPO roofing membrane is highly resistant to constant dampness, ponding water, as well as high and low alkaline conditions.
PVC (polyvinyl chloride), typically called vinyl, is made up of ethylene and chlorine. In the manufacturing process, biocides, plasticizers, ultra‐violet light inhibitors, heat‐stabilizers, color pigments and polyester or fiberglass reinforcement are added to enhance stability and flexibility, as well as achieve high tearing and breaking strengths. A PVC membrane is made up of two plies of PVC material with a polyester reinforcement scrim in between. A PVC roofing membrane is highly resistant to constant dampness, ponding water, as well as high and low alkaline conditions. A PVC roof is also resistant to UV radiation, strong winds, fire and chemicals. Plant roots, fungi and bacteria have no negative effect on a PVC membrane.
Modified Bitumen Roof Systems are available in two types: Styrene Butadiene Styrene (SBS) and Atactic Polypropylene (APP). While both systems sheets can be reinforced with glass or polyester, they do differ in how they are installed on the roof. SBS is typically installed with hot asphalts or cold adhesives. APP is almost always installed utilizing the torch method. Modified Bitumen reinforced membranes offer long-term, watertight integrity you can count on and installation causes minimal disruption to building operations and the environment.