Ethylene Propylene Diene Monomer is classified as a Thermoset. EPDM roofs are single-ply membranes meaning there is only one ply of roofing material, not multiple plies laminated together.

EPDM has been in use on roofs in the USA since the 1960′s and is one of the most common types of low-slope roofing materials. This is because it is relatively inexpensive, simple to install, and fairly clean to work with.

Retro-Fit Metal

Retro-fit metal roof application allows the existing metal roof to be retained, over-laid with insulation and reroofed with a single-ply P.V.C. or T.P.O. membrane.

Simulated Metal

Simulated metal roofs utilize single-ply P.V.C. or T.P.O. membranes with the addition of a simulated standing-seam accessory that is applied to the membrane giving it the appearance of an actual metal roof.

Modified bitumen membranes were originally developed in Europe, where they have enjoyed widespread success since the early 1970s.
Modified bitumen technology developed out of attempts to widen the serviceability range of conventional oxidized roofing asphalt.

In the manufacture of modified bitumen membranes, one or more reinforcing plies, typically composed of fiberglass, polyester, or fiberglass/polyester composite, are encapsulated in polymer modified asphalt of varying weights. Sheets may then be surfaced with mineral granules or metal foils, or remain unsurfaced. The result is a membrane that combines the multi-layer benefits of a built-up roof with the installation advantages of a single-ply membrane

Two main types of Modified Bitumen

SBS (Styrene-butadiene-styrene) formulations perform well in cold weather applications, possess superior elongation and recovery properties, and are quite versatile in their application in that they can be mopped in asphalt, torched, or installed with cold adhesives. Mineral granules and metal foils are generally used in surfacing this type of membrane, as resistance to ultraviolet light is somewhat limited.

APP (Atactic polypropylene) products are more suited to application in hot weather, are resistant to weathering and aging, and are more resistant to ultraviolet radiation than are the SBS membranes. The method of application is generally limited to torching. However, cold adhesive applications have been introduced by a few manufacturers. These membranes are generally manufactured without a surfacing; although granule surfaced products are available. We recommend that protective coatings be installed and maintained on the unsurfaced sheets to provide additional ultraviolet resistance and to achieve the required fire rating.

Neither APP nor SBS membranes are well suited to applications in ponded conditions.

Elastomeric

Elastomeric coatings refer to a liquid-applied monolithic (seamless), fully adhered, elastomeric membrane that’s formed in situ on the roof. These coatings are applied 5 to 10 times thicker than a house paint. Typically, the thickness of an exterior house paint is 3 mils, .003 inches. For elastomeric roofing applications, these would be 15 to 30 mils. It’s a more membrane-like material.

Aluminum

Reflective coatings help reduce indoor building temperatures. They are made from selected asphalts and pigment flakes of pure aluminum. The coatings are ideal for modified bitumen membranes, metal corrugated decks, steep asphalt that has aged 180 days or any emulsion coating that has fully cured.

GAF Lifetime Shingles

More homes and businesses in the U.S. are protected by a GAF roof than by any other product. We are the leading roofing manufacturer in North America, with plants strategically located across the U.S. A member of the Standard Industries family of companies, GAF is part of the largest roofing and waterproofing business in the world.

GAF offers you many great Lifetime shingle choices, including Timberline shingles with Advanced Protection Technology. They’re the #1 selling shingle in North America!

A new roof is more than just shingles! Our lifetime roofing system includes Lifetime shingles, Ice guard, vapor barriers, starter strips, attic ventilation, ridge cap shingles & more!