Minimum Roof Pitch For Fiberglass Shingles

Let us recap on the minimum roof pitch required for each type of roofing material.

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. 2 5 12 to 19 12 pitches clay or cement tiles can be used on a wide range of roof pitches. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

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. That works out to about nine degrees if that works better for you. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Asphalt shingles require a minimum roof pitch of 2 12 or greater. We can even help you find a professional to install it. 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.

Minimum pitch for metal roof. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. The minimum roof slope for metal roofs is dependent upon the roof profile. Corrugated metal roofing has the same minimum pitch.

You could also opt for a pvc flat roofing membrane. 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 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.

Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. Experience the total owens corning roofing system and high quality roofing shingles. Metal roof shingles require a minimum roof pitch of 3 12 or greater. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.

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. Installation on roof slopes below a 2 in 12 pitch is not recommended at all.