Minimum Roof Pitch For Shingles

However it is regrettable that many installers usually ignore this requirement due to the desire for a quick installation process.

Minimum roof pitch for shingles.

The following table provides the minimum required. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. The minimum pitch for shingles is 1 6 which is equivalent to 4.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum requirement is 2 12. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. Shingles of all types need to have a slope to function properly.

The aforementioned 2 12 is the absolute minimum required for installing asphalt shingles. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. Roof slope equivalents as rise. Match the roofing on the covered porch with the main roof.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Wood shakes require a minimum roof pitch of 3 12 or greater. Normal shingle installation is allowable for any roof that has a pitch of at least 4 12.

Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater. Installation on roof slopes below a 2 in 12 pitch is not recommended at all. This number corresponds to the number of inches of rise in a 12 foot run. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Wood shingles require a minimum roof pitch of 3 12 or greater. Tuesday september 11 2018.

The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. What is the minimum slope for an asphalt shingle roof. The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used. Determine the minimum slope of the roof based on the roofing material.

If the pitch is in the middle there will need to be extra applications taken. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.