Maximum Roof Pitch For Asphalt Shingles

Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.

Maximum roof pitch for asphalt shingles.

Minimum required roof slope for roofing materials. This number corresponds to the number of inches of rise in a 12 foot run. 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. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. 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. 9 46 built up roof asphalt. We do install shingles on these in between pitches but special application measures must be taken in this middle ground. Roofing material or system.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Considering the roof slope requirement is important. For example if it is a very low slope water including snowmelt or. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.

You are required to have a double layer of asphalt saturated felt paper or a single layer of ice water shield under your. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Why is 2 12 the minimum. The minimum slope for an asphalt shingle roof is 2 12.