11 Best Of What Is The Minimum Pitch For A Shingle Roof Best Images PNG. Thermoplastic Single-ply membrane roofs must have a design roof slope of 1412 or greater 2 slope. The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used.
The rules can occasionally be broken but generally you should not exceed the low range of the recommendation. For the most part the minimum pitch for metal roof installations depends on what kind of material you are installing and the method in which the material is being fastened. This number corresponds to the number of inches of rise in a 12-foot run.
The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used.
Shingle length or 7 12. Such a small pitch can only work with built-up roofing or specialized synthetic roofing. The shingles are 410. The short simple answer is 212 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.