EPDM is one of the most popular flat roof systems currently used in the United States due to its cost and durability. It is a synthetic rubber material produced as a single-ply membrane, and typically installed on commercial buildings. It's held in place with an adhesive, metal fasteners, or ballast (rocks), and it's popular because it's highly durable and cost-effective.
The membrane is a low-cost solution, but its warranted lifespan has reached 30 years. When an EPDM roofing system is applied properly in appropriate locations, its expected lifespan can reach up to 50 years. As a result of its superior quality, Ethylene propylene diene monomer rubber has become the roofing material of choice in the flat roofing industry. It is resistant to ultraviolet rays, ozone, and various chemicals.