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.

18 43 asphalt shingles with special underlayment requirements 2 in 12. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Roofing material or system.

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. Considering the roof slope requirement is important. We do install shingles on these in between pitches but special application measures must be taken in this middle ground. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

Low sloped roof shingle installation. This number corresponds to the number of inches of rise in a 12 foot run. Why is 2 12 the minimum. Minimum required roof slope for roofing materials.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum slope for an asphalt shingle roof is 2 12. For example if it is a very low slope water including snowmelt or. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.

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. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. You are required to have a double layer of asphalt saturated felt paper or a single layer of ice water shield under your. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.