Maximum Roof Pitch For Shingles

This number corresponds to the number of inches of rise in a 12 foot run.

Maximum roof pitch for shingles.

The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. 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. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

It is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles. Low sloped roof shingle installation 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. This means for every 12 horizontal units the roof must. Clay and concrete tile minimum roof slope roof pitch r905 3 2. 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. Also if asphalt shingles are installed on a roof slope of 2 12 to 4 12 it shall be provided with a double underlayment application.