Minimum Roof Pitch For Fiberglass Shingles

Asphalt shingles require a minimum roof pitch of 2 12 or greater.

Minimum roof pitch for fiberglass shingles.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. That works out to about nine degrees if that works better for you. The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally. We can even help you find a professional to install it.

Installation on roof slopes below a 2 in 12 pitch is not recommended at all. 2 5 12 to 19 12 pitches clay or cement tiles can be used on a wide range of roof pitches. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The minimum roof slope for metal roofs is dependent upon the roof profile.

There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Let us recap on the minimum roof pitch required for each type of roofing material. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.

With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run.

Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. Metal roof shingles require a minimum roof pitch of 3 12 or greater. The minimum requirement is 2 12.

Minimum pitch for metal roof. The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Corrugated metal roofing has the same minimum pitch. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.