ERA applauds the effort to create energy savings and peak load reductions and recognize that a cool roof can often achieve those goals. However, to truly achieve energy savings throughout all parts of the country, many factors must be considered, including intelligent decision-making and due consideration of all aspects of a roofing system. This would include roof design, thermal performance, proper use of insulation and the impact of normal wear and damage caused by extreme conditions. Reviewing all of these factors is the best way for roofing professionals to produce a truly energy efficient roofing system.
EPDM’s outstanding thermal performance and long-lasting durability makes it a viable roofing choice for energy-efficient roof systems in much of the country. In regions where there are more heating degree days than cooling degree days, the energy efficiency of an EPDM roof with proper insulation will likely produce more energy savings than reflective roofs. Click here to review the energy usage comparisons for a number of U.S. cities.
In fact, in those regions were cool weather predominates, a dark roof membrane such as standard EPDM will prevent the buildup of condensation within the roof assembly. Because light-colored membranes remain cooler than their dark-colored counterparts, the contrast between warm interior temperatures and the cooler ones outside is much greater. This can often lead to the development of condensation within the roof assembly which is often mistaken for a leak.
In addition, scientific studies conducted at the Oak Ridge National Laboratories concluded that roof systems featuring ballast over EPDM were as effective as white-membrane roofs in mitigating peak energy demand. See the final report from the Single Ply Roofing Institute
Also, EPDM is also available in a white version, giving roofing professionals a full range of options to consider when developing an energy-efficient roof system.
With these three options, EPDM is a winning choice when seeking an energy-saving roof system.
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