Minimum Roof Pitch Shingled Roof

The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.

Minimum roof pitch shingled roof.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Asphalt shingles minimum roof slope roof pitch r905 2 2. It is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles.

That works out to about nine degrees if that works better for you. You could also opt for a pvc flat roofing membrane. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. The standard of lower pitch actually ranges between 1 12 to 5 12.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The metal roof minimum slope doesn t stray far from other building with different material. What is the minimum pitch slope of an asphalt shingle roof. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. However you can only use this pitch with built up roofing or specialized synthetic roofing. Shingles of all types need to have a slope to function properly.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12. The minimum requirement is 2 12.