Minimum Roof Pitch For Fiberglass Shingles

Minimum pitch for metal roof.

Minimum roof pitch for fiberglass shingles.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. The minimum roof slope for metal roofs is dependent upon the roof profile. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. 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.

The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. That works out to about nine degrees if that works better for you. The minimum requirement is 2 12. 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.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. We can even help you find a professional to install it. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Let us recap on the minimum roof pitch required for each type of roofing material. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. Experience the total owens corning roofing system and high quality roofing shingles. 2 5 12 to 19 12 pitches clay or cement tiles can be used on a wide range of roof pitches.

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

Asphalt shingles continue to be the most widely installed roof covering option in north america. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. Installation on roof slopes below a 2 in 12 pitch is not recommended at all. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.

With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. Asphalt shingles require a minimum roof pitch of 2 12 or greater. Shingles of all types need to have a slope to function properly.