The roof at the Albo Manufacturing headquarters is still going strong four decades later, serving as a testament to the durability of EPDM.<\/figcaption><\/figure><\/div>\n\n\n\nOther than congratulating the owner for his savvy decision-making, why should we be talking about this durable roof? Is it a \u201cone-off\u201d or a sample of what might be expected from an EPDM membrane? Here\u2019s why the 40-year performance of an EPDM roof is increasingly relevant today: we are facing new challenges now as we look for ways to protect our buildings from extreme weather events. While there may be debate about the cause, indisputable global statistics confirm the increasing frequency of more extreme weather: intense tornado outbreaks, record-setting heat, catastrophic wildfires, heavy downpours, longer droughts, and more frequent and more powerful hurricanes. This roof teaches us important lessons from its 40-year performance, and helps to inform decision-making moving forward.<\/p>\n\n\n\n
In a highly competitive marketplace, the manufacturers of EPDM \u2014 Firestone Building Products as well as Carlisle SynTec Systems, and Johns Manville \u2014 have joined to create the EPDM Roofing Association (ERA), and invest in the science that delivers the data behind record-setting roofs like the facility in West Bend. This effort, in turn, has led to a generation of improvements that deliver a product based on 21st century science.<\/p>\n\n\n\n
For instance, while ERA has numerous examples of the durability of EPDM from case studies, it was important to the association to investigate the science behind the longevity of their product. To that end, in a landmark aging study, ERA examined five roof systems with 28 to 32 years of in-field service, and concluded that all of the systems examined were still performing as intended. In fact, the study found that all of the samples were essentially performing \u201clike new\u201d with physical characteristic properties above or just below the minimum characteristics of newly manufactured 45-millimeter EPDM membrane. The roofs were first inspected in the field to get a good sense of their condition, and then samples were sent to a testing facility for the roofing industry. The laboratory testing examined five critical performance characteristics of the EPDM membrane.<\/p>\n\n\n\n
The Elongation Test Results showed that four of the five roof samples exceeded the minimum characteristics for aged EPDM, and one exceeded the minimum for new EPDM. For Tensile Strength, all five samples exceeded the minimum standard. For Thickness XD (Cross Direction), three samples exceeded the manufacturer minimum, while the other two missed by one-thousandth of an inch. For Thickness MD (Machine Direction), three achieved or exceeded the minimum, while one missed by one one-thousandth of an inch and another by four one-thousandths of an inch. For Factory Seam Strength, it was only possible to test two of the samples, but both easily surpassed manufacturers\u2019 minimums.<\/p>\n\n\n\n
Overall, ERA has conducted four studies on EPDM that validate the long-term performance of the EPDM membrane. \u201cThe first field studies of EPDM were done in the late 1980s, and we are finding a pattern,\u201d says Thomas W. Hutchinson AIA, FRCI, RRC and Principal, Hutchinson Design Group, Ltd., Barrington, Illinois. \u201cThe pattern is that these roofs can really last a long time. By using today\u2019s advanced design techniques and proper roof maintenance, it is reasonable to expect that an EPDM roof will approach or exceed 40 years of service.\u201d<\/p>\n\n\n\n
Given the recent challenges of increasingly cataclysmic weather events, this durability and longevity is one important aspect of the contribution that EPDM can make to a resilient roofing system. Additionally, EPDM has excellent hail resistance, remaining flexible and pliable so that it can absorb the impact from hail without fracturing. The membrane is also very dimensionally stable when exposed to significant changes in temperature and EPDM is the only commercially available membrane that performs in an unreinforced state, making it very forgiving to large amounts of movement without damage and potentially more cycles before fatiguing. Seaming technology has constantly improved over the last 40 years, and has brought about innovations such as double-sided tape and factory applied tape. Sixty millimeter and 90-millimeter membrane has been introduced, offering enhanced puncture resistance.<\/p>\n\n\n\n
These improvements to EPDM over the last four decades add up to increasingly sustainable and resilient construction. During a time when resilient structures are essential to a recovering economy, the value of updated EPDM is more evident than ever to the building owner. Kurt Mueller up in West Bend is grateful that his father\u2019s roof continues to provide shelter for his small business. For anyone making a decision about a roofing membrane today, it\u2019s important to know that the 21st century product, with increased strength and multiple improvements, is not your father\u2019s EPDM.<\/p>\n\n\n\n
For more information about EPDM as part of a resilient roofing system, consult ERA\u2019s 2020 Resilience Report (http:\/\/epdmtheresilientroof.org<\/a>.)<\/p>\n\n\n\nAbout the author:<\/em><\/strong> <\/em>Louisa Hart is the director of communications for the Washington-based EPDM Roofing Association (ERA). For more information, visit <\/em>www.epdmroofs.org<\/em><\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"The Firestone RubberGard EPDM roof system on the headquarters of Albo Manufacturing in West Bend, Wisconsin was installed in October of 1980. Photos: Firestone Building…<\/p>\n","protected":false},"author":46,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[26,25,1],"tags":[127,2235],"jetpack_publicize_connections":[],"yoast_head":"\n
EPDM System\u2019s Long-Term Performance Reveals Important Lessons - Roofing<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n