Minimum Roof Pitch For Asphalt Shingles

Metal roof shingles require a minimum roof pitch of 3 12 or greater.

Minimum roof pitch for asphalt shingles.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Let us recap on the minimum roof pitch required for each type of roofing material. What slope is considered low slope for shingles.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Considering the roof slope requirement is important. That works out to about nine degrees if that works better for you. If you re having asphalt shingles put on your roof you will have to have a minimum slope.

The minimum requirement is 2 12. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. 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. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal. Asphalt felt paper that is tacked to the roof sheathing. They won t be appropriate for all roofs. A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction.

For example if it is a very low slope water including snowmelt or. Why is 2 12 the minimum. What precautions need to be taken to install shingles on low slopes. Minimum slope for asphalt shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. For low slopes as well as any other slope your local building department should be contacted. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. But shingle roofing is not watertight in the sense that standing water or wind driven water on a low slope roof can work its way up between the laps which is the reason for the minimum 2 12 slope.

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. For those who don t understand the roof pitch number here is a way to envision it. What is the minimum pitch slope of an asphalt shingle roof. There are plenty of other options however for flat and nearly.

Asphalt shingles require a minimum roof pitch of 2 12 or greater. Shingles of all types need to have a slope to function properly. All asphalt shingle roofs with a pitch of 4 12 or more have an underlayment of 15 lb. Fortunately the requirements are quite accommodating.

Asphalt shingles do require that you have a minimum pitch to your roof.