Minimum Slope For Asphalt Shingle Roof

Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Minimum slope for asphalt shingle roof.

The requirements for an asphalt shingles roof are contained in the international building code. Installation on roof slopes below a 2 in 12 pitch is not recommended at all. Minimum slope for asphalt shingles. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.

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. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Asphalt shingles minimum roof slope roof pitch r905 2 2. 18 43 asphalt shingles with special underlayment requirements 2 in 12.

9 46 built up roof asphalt. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Roofing material or system. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

Learn more about slope roof. 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. Asphalt shingles continue to be the most widely installed roof covering option in north america. What is the minimum pitch slope of an asphalt shingle roof.

Minimum required roof slope for roofing materials. In 12 0 25 in 12 1 19 built up roof coal tar pitch. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. 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.

Rolled roofing material is often used on roofs that are low sloped. Experience the total owens corning roofing system and high quality roofing shingles. Shingles of all types need to have a slope to function properly. What is the recommended installation requirements for the installation of a shingle below a 4 in 12 pitch.

The minimum requirement is 2 12. We can even help you find a professional to install it. This number corresponds to the number of inches of rise in a 12 foot run. 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.

The minimum slope for an asphalt shingle roof is 2 12. That works out to about nine degrees if that works better for you. According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.