Maximum Roof Pitch For Shingles

What is the minimum slope for an asphalt shingle roof.

Maximum roof pitch for shingles.

Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. 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. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.

Clay and concrete tile minimum roof slope roof pitch r905 3 2. 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. This means for every 12 horizontal units the roof must. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. This number corresponds to the number of inches of rise in a 12 foot run. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. Asphalt shingles continue to be the most widely installed roof covering option in north america.