Minimum Roof Pitch Shingled Roof

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Minimum roof pitch shingled roof.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. That works out to about nine degrees if that works better for you.

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. However you can only use this pitch with built up roofing or specialized synthetic roofing. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

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

The minimum requirement is 2 12. What is the minimum pitch slope of an asphalt shingle roof. You could also opt for a pvc flat roofing membrane. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Shingles of all types need to have a slope to function properly. Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.