Maximum Roof Pitch For Asphalt Shingles

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above.

Maximum roof pitch for asphalt shingles. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Why is 2 12 the minimum. 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. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.

We do install shingles on these in between pitches but special application measures must be taken in this middle ground. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. 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 minimum slope for an asphalt shingle roof is 2 12. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Roofing material or system. This number corresponds to the number of inches of rise in a 12 foot run.

In 12 0 25 in 12 1 19 built up roof coal tar pitch. Considering the roof slope requirement is important. You are required to have a double layer of asphalt saturated felt paper or a single layer of ice water shield under your. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Low sloped roof shingle installation. 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. 9 46 built up roof asphalt.