EPDM has one of the longest service lives of any commercial roof type, with over 50 years of documented field testing to support its reliability.
EPDM is very flexible and provides a high level of waterproofing, as well as a number of installation options and insulation types to suit any building owner’s timeline or budget.
EPDM roofs are known for their resistance to weather, heat aging, and UV exposure. They’re also compatible with a range of prefabricated accessories, allowing an easier installation and compatibility with my roof types.
EPDM is most often ballasted and held in place by large round stones or slabs, known as “river rock.”
EPDM can also be mechanically fastened. This is normally a more cost-effective installation method but is not recommended for buildings susceptible to stronger wind conditions.
Adhered EPDM is chemically glued to create a smooth, aesthetically-pleasing surface and offer higher wind resistance.
EPDM roof rolls can also be made with pre-applied tape for self-installation but this method is not nearly as integrally sound as other methods.
EPDM offers 3 major insulation types with various determinants and R-values. An R-Value is the measure of a material’s ability to retain heat. The higher the R-value, the more effective it will be at insulating.
Polyisocyanurate, or polyiso, remains the most popular insulations that’s to it’s high R-value. A great fit for EPDM, however, it may not be suitable for buildings with certain fire restrictions or deck types.
Expanded Polystyrene, or EPS, is a more cost-effective option, offering a higher R-value per dollar, but is usually only used on tapered roofing systems.
Extruded Polystyrene, or XPS, has an R-value ratio that fits right in between polysio and EPS. It’s often identified by its blue, pink, or green coloring.
EPDM is relatively straightforward and cost-effective to repair and maintain.
Most repairs require the cleaning and priming of its membrane, installation of self-adhered flashing, and a waterproofing lap sealant. EPDM repairs sound simple, but require special equipment and certified contractors, so please consult a professional before ever attempting your own repairs.
Want to learn more? Dive deeper into the costs, details, and methods of EPDM roofing installation HERE on the Unlimited Blog.