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EPDM Roofing

"Carlisle, Versico, Genflex, Firestone"

This is the oldest type of single ply roofing, which remains widely in use today and has had consistent formulations for the last 40 years or so. These types of roofs are often referred to as rubber roofs, as they have a similar appearance to a rubber tire inner tube.

EPDM – Industrial Rubber Roofing

EPDM or commonly referred to as a “Rubber roof” is a very popular roofing system throughout the country. They may installed by one of three methods: fully adhered with an adhesive, ballasted or held down by rock, or by being mechanically attached with screws and plates.

EPDM stands for ethylene propylene diene monomer. It is an elastomeric compound with ethylene and propylene are the two main ingredients which are derived from oil and natural gas. There are only small amounts of diene monomer. These ingredients are synthesized to produce a product that exhibits a high degree of ozone, ultraviolet, weathering and abrasion resistance, and provides outstanding low temperature flexibility.

Sheet widths range from 7.5 feet to 50 feet wide and are typically 45 mils and 60 mils thick. Mechanically fastened assemblies rely on rows of screws or nails to secure the membrane to roof deck. Fully Adhered assemblies use special glues to ensure the membrane stays stuck tight to the insulation.  Loose laid assemblies are not fastened to the roof deck but rather are covered in smooth river rock whose weight ensures the membrane does not blow away. EPDM seams are typically sealed with a roof cement compound. However, some manufacturers market self-sticking sheets with the adhesive pre-applied to the membrane.

Durable, Resistant to Impact, Long Track Record

Absorbs Heat, Prone to Shrinkage Near End of Life

EPDM Rubber Roof Repair in St. Louis by Jewett Roofing

EPDM Repair

EPDM Weaknesses:

  • Seam failure
  • Curbs and Penetrations
  • Membrane shrinking and pulling away from edges and penetrations

More Information about EPDM Repair.


Thermoset Membranes.” Home. NRCA. Web. 3 Dec. 2014.

Why EPDM?” Home. Web. 3 Dec. 2014.

Cranor, John. “Understanding Inspecting EPDM Roofing.” ASHI Reporter, 1 Nov. 202. Web. 3 Dec. 2014.

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