Also known as rubber roofing, this roofing membrane is a flexible rubber material that is available in 45 mil (about the thickness of a dime), 60 mil (about the thickness of a quarter) and 90 mil (about the thickness of two dimes).

With its superior flexibility and high strength, EPDM can easily contour to unusual roof shapes. Black EPDM is sold in sheets up to 50' wide and 100' long, making seams unnecessary for most applications.