Maximum Roof Pitch For Asphalt Shingles

In 12 0 25 in 12 1 19 built up roof coal tar pitch.

Maximum roof pitch 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. 9 46 built up roof asphalt. Why is 2 12 the minimum. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

We do install shingles on these in between pitches but special application measures must be taken in this middle ground. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Minimum required roof slope for roofing materials. Roofing material or system.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. 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. Low sloped roof shingle installation.

Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. The minimum slope for an asphalt shingle roof is 2 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. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.

Considering the roof slope requirement is important. 18 43 asphalt shingles with special underlayment requirements 2 in 12. This number corresponds to the number of inches of rise in a 12 foot run. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.