![]() However, the investment for a metal roofing solution likely will be much higher upfront than other flat roofing solutions. Additionally, metal roofs can withstand high winds and are largely impact resistant. Benefits to metal roofing including longevity, durability and heat resistance. ![]() Copper, aluminum, stainless steel and tin also are used in commercial metal roofing applications. Many of today’s low slope metal roofs are made from corrugated galvanized steel – a steel sheet coated with zinc. Lead roofing later joined bronze as a popular choice for cathedrals and castles throughout Europe during medieval times. The NRCA offers an online course for an in-depth look at liquid-applied roof membrane options.Īs one of the world’s oldest roofing systems, metal roofing began with materials like the bronze tiles on Rome’s ancient Pantheon. While liquid applied coatings are highly elastic, self-flashing and easily applied to contoured surfaces, they have low permeability and require uniform thickness. Liquid applied membrane systems require rigorous preparation of the substrate, which must be dry and dust-free with patched cracks. Liquid Applied and Spray Foam Roofing SystemsĪs outlined in the Manual, liquid applied membrane roofing includes hot and cold polymer-modified asphalt, single-component asphalt or coal tar-extended urethane and two-component urethane elastomer. Market share for these and other system solutions follow by percentage in the chart below:įrom here, we’ll examine these low slope roofing system choices in the chart, from those with the smallest market share to the greatest. In third place is Mod Bit at 12.4 percent of the new construction market and 14 percent of the reroofing market. EPDM follows next, capturing 22 percent of market share for new construction and 26 percent of the reroofing market. The survey results show TPO as the low-slope market leader, garnering a 40 percent share of the new construction market and 30 percent of the reroofing market. continue to reflect the recent trends in low slope commercial roofing applications. The 2015-2016 NRCA Market Survey shows that roof system types throughout the U.S. On the NRCA micro-site Everybody Needs a Roof, building owners and professionals can learn more about the importance of proper roofing materials and applications, find contractors and even ask experts questions about all components of roofing. Their easy-to-navigate site provides a comprehensive overview of materials, applications, courses and other resources for contractors and building professionals. The National Roofing Contractors Association ( NRCA) offers a robust website and resources geared for contractors about everything roof related. Griffin, this is one of the most comprehensive written guides to commercial flat roofing. Originally written in 1970 by roofing experts R.L.
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