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1.) The Ballasted E.P.D.M. Roofing System incorporates (black only) .045 inch or .060 inch thick black non-reinforced or reinforced EPDM membrane. Either an acceptable membrane underlayment or insulation and the EPDM membrane are laid loose over the substrate and held in place with a minimum of 10 pounds of ballast per square foot. Adjoining sheets of EPDM membrane are seamed together a minimum of 3 inches using Primer and Seam Tape, OR Primer, Seam Adhesive, and Lap Sealant. The maximum roof slope for this roofing system is 2 inches to one horizontal foot.
2.) The Fully Adhered E.P.D.M. Roofing System incorporates (black only) .045 inch thick, or (black or white) .060 inch thick non-reinforced, OR (black) .045 inch or .060 inch thick reinforced EPDM membrane. An acceptable insulation is mechanically attached to the roof deck typically every 2 square feet and the EPDM membrane is fully adhered to the insulation with Substrate Adhesive. Adjoining sheets of EPDM membrane are seamed together a minimum of 3 inches using Primer and Seam Tape on black membranes, OR Primer, Seam Adhesive, and Lap Sealant on black or white membranes. There are no maximum slope restrictions for the application of this roofing system.
3.) The Mechanically Attached E.P.D.M. Roofing System (Black) incorporates .045 or .060 inch thick, 7' wide non-reinforced EPDM membrane. An acceptable insulation is mechanically attached to the roof deck typically fastener and plate every 8 square feet. The non-reinforced EPDM membrane is mechanically attached to the roof deck with fasteners and batten. The fasteners and metal batten are centered in a 6-inch wide seam and attached at a rate of 6 or 12 inches on center, dependent on project criteria. Adjoining sheets of EPDM membrane are seamed together using primer and 6" seam tape. The maximum roof slope for this roofing system is 6 inches to one horizontal foot.
With the choice of .045 mil or a .060 mil rubber roof system, you can decide which thickness best fits your needs. With the minimal cost difference between the two, most select the .060 mil, which comes with a longer warranty.
Note: E.P.D.M. is a nice, clean roof system. Proper maintenance programs allow for a strong warranty and in many cases a roof system that will outlast the manufacturers guarantee.
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