Maximum Roof Pitch For Asphalt Shingles

Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.

Maximum roof pitch for asphalt shingles.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12. We do install shingles on these in between pitches but special application measures must be taken in this middle ground.

Considering the roof slope requirement is important. This number corresponds to the number of inches of rise in a 12 foot run. Asphalt shingles continue to be the most widely installed roof covering option in north america. You are required to have a double layer of asphalt saturated felt paper or a single layer of ice water shield under your.

Minimum required roof slope for roofing materials. If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Why is 2 12 the minimum.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. Roofing material or system. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.

Low sloped roof shingle installation. The minimum slope for an asphalt shingle roof is 2 12. 9 46 built up roof asphalt. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.