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 of pipe boot flashings?
Tuesday, June 9, 2020
You can expect pipe boot flashings to last 15 to 30 years, with an average of 20 years. Pipe boots tend to have a shorter life than other types of roof flashings for two reasons: 1) the old-fashioned lead pipe boots can get gnawed away by squirrels after just a few years because, although poison, lead tastes sweet; and 2) the rubber membrane in newer style pipe boots sometimes collapses as early as 12 years.
To learn more about roofing boots, go to our articles What is a roofing boot? and Which are better: lead or rubber roof vent pipe flashing boots?
Here’s a bar graph that compares estimated life of pipe boot flashings with other roof components.
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 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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To learn more about roofs and attics, see these other blog posts:
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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