-->

Standard Roof Angles


-->

Standard Roof Angles. They are the easiest ones to construct, and they are safe to walk on. A complete table of roof slope, rise/run, walkability, angle or slope expressed as grade, and classification of roofs as flat, low slope, and steep slope.

Roof Slopes Inspection Gallery InterNACHI®
Roof Slopes Inspection Gallery InterNACHI® from www.nachi.org

However, a common standard pitch for residential roofs is approximately 4:12, which means the roof rises 4 inches vertically for every 12 inches it extends horizontally. They have a pitch that can be as high as 21:12 (175%). Easy reference for roof pitches from 1/12 to 20/12.

-->

Roof Slopes Inspection Gallery InterNACHI®

Conventional roofs have the pitch ranging from 4:12 to 9:12 (33.3% to 75%). This article explains the various uses and aspects of roof pitch. A complete table of roof slope, rise/run, walkability, angle or slope expressed as grade, and classification of roofs as flat, low slope, and steep slope. They are the easiest ones to construct, and they are safe to walk on.

-->