How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What is the average life expectancy an EPDM roof?
Tuesday, December 10, 2019
How long does an EPDM roof last?
An EPDM roof can be expected to last 20 to 30 years, with an average of 23 years. Possibly longer with diligent maintenance. EPDM stands for Ethylene Propylene Diene Monomer. It is a synthetic rubber membrane and, like any membrane roof, punctures from walking or dragging anything over the surface; but, if leaks occur, they are often at the glued seams. UV-light deterioration has been a problem, but newer formulations of the material are more UV-resistant.
It is also classified as a cool roof when installed with white side up and EPDM does not leach any contaminants into the rainwater that flows over it and off the roof, unlike asphalt/bituminous roofing. So it can be specified for “green” homes with rainwater catchment systems. To learn more, go tour blog post What is an EPDM roof?
Go to our blog post What is the average lifespan of the parts of a house? for rating of other house components. To understand the basis, potential use, and limitations of lifespan ratings, see our blog post How accurate are the average life expectancy ratings of home components? Are they actually useful?
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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at amazon.com for $19.95.
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Here’s links to a collection of our blog posts about “FLAT ROOFS (LOW SLOPE)":
NOTE: These life expectancies are based on data provided by InterNACHI, NAHB, FannieMae, and our own professional experience. Because of the numerous variables that can affect a lifespan, they should be used as rough guidelines only, and not relied upon as a warranty or guarantee of future performance.
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