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 a low slope roof?
Wednesday, March 18, 2020
Good question. And the answer depends on who you ask. The American Society for Testing Materials (ASTM) defines a low slope roof as less than a 2/12 pitch (2 units vertical for every 12 units horizontal). Carson & Dunlop, a well-known engineering firm, calls it as a range between 2/12 and 4/12. Other sources consider low slope as less than 3/12 or 4/12. Take your pick. We subscribe to the less than 2/12 pitch, which is a nearly flat roof.
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To learn more about roofs and attics, see these other blog posts:
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