Minimum Roof Pitch Shingled Roof

Asphalt shingles minimum roof slope roof pitch r905 2 2.

Minimum roof pitch shingled roof.

The metal roof minimum slope doesn t stray far from other building with different material. Shingles of all types need to have a slope to function properly. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. The standard of lower pitch actually ranges between 1 12 to 5 12.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. However you can only use this pitch with built up roofing or specialized synthetic roofing. Asphalt shingles continue to be the most widely installed roof covering option in north america. What is the minimum pitch slope of an asphalt shingle roof.

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 2 12 number is rise over run or two units of vertical for every 12 units horizontal. You could also opt for a pvc flat roofing membrane. 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.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. 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 minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The minimum requirement is 2 12. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.