Maximum Roof Pitch For Shingles

Clay and concrete tile minimum roof slope roof pitch r905 3 2.

Maximum roof pitch for shingles.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Asphalt shingles continue to be the most widely installed roof covering option in north america. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. 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.

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. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. This means for every 12 horizontal units the roof must. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt 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. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.

The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater.