Maximum Roof Pitch For Asphalt Shingles

The minimum slope for an asphalt shingle roof is 2 12.

Maximum roof pitch for asphalt shingles.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. 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.

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. 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.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. Asphalt shingles continue to be the most widely installed roof covering option in north america. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Why is 2 12 the minimum.

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. In 12 0 25 in 12 1 19 built up roof coal tar pitch. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. Low sloped roof shingle installation.

We do install shingles on these in between pitches but special application measures must be taken in this middle ground. For example if it is a very low slope water including snowmelt or. This number corresponds to the number of inches of rise in a 12 foot run. 18 43 asphalt shingles with special underlayment requirements 2 in 12.