Minimum Pitch For Shingle Roof

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Minimum pitch for shingle roof.

Shingles of all types need to have a slope to function properly. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. 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 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. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. The minimum requirement is 2 12. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Asphalt shingles continue to be the most widely installed roof covering option in north america. However you can only use this pitch with built up roofing or specialized synthetic roofing. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. The metal roof minimum slope doesn t stray far from other building with different material.

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. These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12. 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. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. What is the minimum pitch slope of an asphalt shingle roof. The standard of lower pitch actually ranges between 1 12 to 5 12.

The roofing materials most often used for these pitches include asphalt composite shingles.