Minimum Pitch For Shingle Roof

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

Minimum pitch for shingle roof.

The roofing materials most often used for these pitches include asphalt composite shingles. These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12. 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. The standard of lower pitch actually ranges between 1 12 to 5 12. The minimum requirement is 2 12. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The metal roof minimum slope doesn t stray far from other building with different material. Minimum pitch for metal roof. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. That works out to about nine degrees if that works better for you. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. 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. However you can only use this pitch with built up roofing or specialized synthetic roofing. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. The minimum roof slope for metal roofs is dependent upon the roof profile.

Traditional 3 tab shingles made with asphalt composite are the most popular type of shingle and are the most flexible in terms of adapting to many roof pitches.