EPDM’s application methods (ballasted, fully adhered and mechanically attached) allow the membrane to be installed on slopes with positive drainage up to and including vertical applications for fully adhered systems. Good roofing practice always includes provisions for proper drainage for any type of roof system and in cases, is dictated by local building codes. Because an EPDM roofing system remains stable over a wide range of temperatures, it allows for year-round installation in all climates.