Minimum Slope For Asphalt Shingle Roof

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

Minimum slope for asphalt shingle roof.

Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. We can even help you find a professional to install it. The roof pitch between 2 12 and 4 12 is considered as a low pitch roof. The requirements for an asphalt shingles roof are contained in the international building code.

That works out to about nine degrees if that works better for you. If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch.

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal. Experience the total owens corning roofing system and high quality roofing shingles. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

9 46 built up roof asphalt. 18 43 asphalt shingles with special underlayment requirements 2 in 12. The minimum slope for an asphalt shingle roof is 2 12. Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.

Minimum slope for asphalt shingles. Installation on roof slopes below a 2 in 12 pitch is not recommended at all. 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. This number corresponds to the number of inches of rise in a 12 foot run.

What is the recommended installation requirements for the installation of a shingle below a 4 in 12 pitch. Minimum required roof slope for roofing materials. Asphalt shingles minimum roof slope roof pitch r905 2 2. What is the minimum pitch slope of an asphalt shingle roof.

In 12 0 25 in 12 1 19 built up roof coal tar pitch. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Rolled roofing material is often used on roofs that are low sloped.

What is the minimum slope for an asphalt shingle roof the short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Asphalt shingles continue to be the most widely installed roof covering option in north america. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.