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EPDM Rubber Membrane Roofing

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EPDM has gained industry-wide acceptance and respect by providing easy immediate and long-term roofing solutions, with a great wear factor. As more emphasis is placed on the sustainable performance of building materials, EPDM continues to be the roofing material that stands the test of time.

Fully adhered systems using EPDM rubber roofing "panels" off rolls that can measure up to 20 feet by 100 feet. Various dimensions and system components vary between manufacturers; installers should not mix and match roofing materials from different manufacturers! Firestone, Carlisle, Johns Mansville, you name it - we are familiar with all the major EPDM brands and their system components.

The membrane is bonded (glued down) with rubber cement adhesive rolled onto the insulation with paint rollers. The insulation sheets (generally closed cell urethane ISO foam insulation of varying thicknesses (with compatible paper surfaces bonded on both sides) that is designed to be compatible with the adhesive, of which is screwed to the deck utilizing mechanical fasteners, stress plates and/or adhesives. Either non-reinforced or scrim reinforced membrane can be used, with the non-reinforced membrane making up most adhered installations.

Fully adhered systems are lightweight and ideal for a wide range of building sizes and geometric configurations, including complex crickets and diverters, and high-slope applications. Because of recent technological advances in application, the fully adhered system is becoming the system of choice for roof replacement applications in many areas of the country.

However, We have found that this type of membrane roofing system, whether EPDM or TPO, can sustain hail damage to the insulation while sparing the membrane, however, the sustained insulation damage will require much more frequent replacement of the roof in many parts of the country, at a slightly cheaper initial cost.

Mechanically attached systems can be installed using large panels and attached through the edge of the membrane, then adhering (or welding if TPO) the following membrane "panel" to continue the course, or using narrow panels attached in the side laps. Non-reinforced or scrim reinforced membranes can be used, depending on the needs of the building owner. The membrane is then attached using either screws and round plates or batten strips to the underlying deck. Mechanically attached systems are lightweight and are ideal for all building sizes and configurations. This configuration protects the insulation from damage but is more susceptible to wind uplift. Tornadoes and straight line winds create lift vacuum similar to an aircraft wing when passing over a flat roof surface.

Mechanically Attached Fully Adhered Roofing Systems

We can double the lifespan, the hail resistance, the fire resistance, and the wind resistance performance of the roof, at very little additional cost. This is our #1 recommended flat roof and low slope roofing choice for small to medium size commercial and residential properties throughout Colorado. EPDM rubber membrane roofing material glued to a waterproof hardboard backer is one of the toughest and most durable roofing systems available; we specialize in and highly recommend this roofing system for use in Colorado on flat or low slope roofs. When installed with a fiber reinforced deck sheeting product that is designed to be mechanically attached with screws (DensDeck), a very stable surface ideal for adhering the rubber membrane to is created. The 60 millimeter thick EPDM membrane installed with this method achieves the highest impact and wind uplift ratings, and can last up to 50 years.

Being from Colorado, one of the most wind, tornado and hail prone regions in the United States, we have discovered that by combining the mechanically attached substrate DensDeck Fiberglass reinforced gypsum decking board installed over the top of ISO insulation or polystyrene foam taper system components, then applying the rubber cement adhesive that provides the Fully Adhered membrane component, wed have created of one of the most durable roofing systems on the market: Our EPDM Roofing technique:

  • Creates the most Fire Resistant Flat Roof material on the market, with a Class A Fire Rating. This fire rating demonstrates a significantly reduced risk of damage by externally caused fires and windblown embers; it is the same Fire Resistance Rating as Asphalt Shingles and Steel Roofing.

  • Creates the most Wind Uplift Resistant Flat Roof Surface on the market. The membrane is glued to the decking; this provides no place for wind uplift or vacuum to grab the membrane to separate it from the screwed down decking. Wind lift resistance should exceed 130 mph.

  • Creates the most Hail Resistant Low Slope Roof on the market. With the ¼ inch DensDeck fiberglass reinforced gypsum roof decking material mechanically attached as the back bone of the roof, the rubber EPDM membrane AND the surface under the membrane will withstand impacts of hard hail well beyond 2 inches in diameter with no discernable damage, saving money and hassle on reduced claims, and often earning a premium discount on the property insurance.

  • Creates a roof that has a rated Lifespan of 50 years, according to Xactimate, the leading property insurance and contractors pricing software.

Ask your agent, or call us on 303.495.4828 for additional money saving strategies.