Maximum Roof Pitch For 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.

Maximum roof pitch for shingles.

Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. 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. 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.

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. Clay and concrete tile minimum roof slope roof pitch r905 3 2. 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. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Asphalt shingles continue to be the most widely installed roof covering option in north america.