Commonly known as “rubber roofing,” EPDM (Ethylene Propylene Diene Monomer) is a durable synthetic rubber membrane, usually black, that looks like an inner tube.
- The Pros: Extremely durable and flexible; it handles hail impacts better than almost any other material because it bounces back. It is also generally the most affordable membrane.
- The Cons: Seams are sealed with adhesive tape or glue, not heat-welded. Over time, these glues can dry out and fail, leading to leaks.
- Texas Context: The standard black color absorbs massive amounts of heat, often heating the roof to 180°F+, which radiates into the building. In Texas, EPDM is only recommended if it is ballasted (covered in stones) or coated with a white acrylic/silicone topcoat to reflect the sun.