Rubber Roofing System (EPDM)
EPDM, (ethylene propylene diene monomer), is commonly known as rubber. With three different assembly methods and two membrane color choices, there is an EPDM Roof for every climate.
Color choices include black or white EPDM, a variety of thicknesses available, and assembly methods include ballasted, fully adhered, or mechanically fastened systems.
All of the EPDM systems have a variety of warranty options up to 20 years. Some systems, such as a fully adhered 90 mil system offer up to 30 year warranties. In addition to the total system warranties, options are available that can cover higher wind blow off ratings, hail damage, and, depending on the system, accidental puncture coverage.
White EPDM combines the high-performance standards of traditional EPDM with a highly reflective, environmentally friendly surface designed to cut energy costs. Because of its reflectivity, white EPDM is installed using the fully adhered system. Read about other cool roof options.
Ballasted EPDM systems are economical and suitable for a wide variety of buildings where other systems are cost prohib
itive. It can be applied on any building that can accommodate the extra load of the ballast and where the roof slope does not exceed 10%. The ability to use wider membrane rolls, available in black with thicknesses of 45, 60 and 90 mil, the ballasted system provides fast coverage at a relatively low cost. The EPDM membrane is loose-laid over the insulation and held in place by smooth, river-washed stone or concrete pavers. Ballasted systems are primarily used for large new construction projects, but can also be used on roof replacement or as a roof recovery over an existing roof where the existing structure can support the additional weight. Ballasted roofing systems, though economical, have the shortest lifespan of the EPDM systems and require more maintenance than other systems as they age.
Fully adhered EPDM systems, available in black or white, are a lightweight option with outstanding design flexibility, utilizing 45, 60 and 90-mil membranes. This system can be applied on flat roofs and certain sloped roofs with special considerations taken.
The membrane is adhered to insulation, which is either mechanically fastened to the roof deck or adhered with a special insulation adhesive, and adjoining sheets of EPDM are spliced together. 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.
This system, though more expensive to install, is the longest lasting of the EPDM systems and typically requires less maintenance throughout its lifespan, giving the owner a lower life cycle cost.
Mechanically attached EPDM systems, available in black, are ideal in situations where the structure cannot accommodate a ballasted system but the budget cannot accommodate an adhered system. Reinforced membranes in 45, 60 or 75mil are applied over insulation that is mechanically attached to the roof deck. The membrane is held in place by fasteners that are installed in the seam lap between the individual membrane sheets. The mechanically attached system typically has a longer lifespan and requires less maintenance than a ballasted roof, but more maintenance than an adhered roof.