Minimum Roof Pitch Shingled Roof

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Minimum roof pitch shingled roof.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

What is the minimum pitch slope of an asphalt shingle roof. 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

The minimum requirement is 2 12. Asphalt shingles continue to be the most widely installed roof covering option in north america. 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. That works out to about nine degrees if that works better for you.

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. Asphalt shingles minimum roof slope roof pitch r905 2 2. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. 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. You could also opt for a pvc flat roofing membrane. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.