Minimum Roof Pitch Shingled Roof

Shingles of all types need to have a slope to function properly.

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. That works out to about nine degrees if that works better for you. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

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. However you can only use this pitch with built up roofing or specialized synthetic roofing. The standard of lower pitch actually ranges between 1 12 to 5 12. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

What is the minimum pitch slope of an asphalt shingle roof. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Asphalt shingles minimum roof slope roof pitch r905 2 2. 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. 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 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 roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The minimum requirement is 2 12. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.