Ethylene propylene diene monomer, or EPDM, is a roofing membrane that has been around the commercial roofing industry for many decades.  It has a reputation of low maintenance and excellent weathering characteristics.  The membrane is black in color and absorbs the sun’s solar energy, leading to reductions in heating costs during winter months, thus making it a popular choice in northern climates. The EPDM membrane provides extreme flexibility and hail resistance. Manufacturer warranties for EPDM roof systems are available up to 30 years.