Minimum Roof Pitch For Rolled Roofing

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Minimum roof pitch for rolled roofing.

Or the colon can replace the slash as in 2 12 or 7 12. You could also opt for a pvc flat roofing membrane. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. 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.

Low sloped roof shingle installation. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. Functional pitch the function of the roof in weather and the environment determines the minimum pitch for a roof. Complete list of roofing types.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Roof pitch designations are comprised of two numbers indicating a ratio. For steep slope roof systems ibc 2018 provides for a 1 12 minimum roof slope for mineral surfaced roof roll roofing. Roof pitch multiplier table.

Pitch is the term used to describe the angle slope or slant of your roof. Degrees to pitch rise in run table. Wood shakes require a minimum roof pitch of 3 12 or greater. The minimum roof slope for metal roofs is dependent upon the roof profile.

Normal roof slope for typical installation. 3 12 minimum roof slope for metal roof panels with nonsoldered seams. Asphalt shingles continue to be the most widely installed roof covering option in north america. Roof pitch defined and explained.

If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening. Built up roofs require a minimum roof pitch of 1 4 12 or greater. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Slate and slate type shingles require a minimum roof pitch of 4 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. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. 2 1 2 12 minimum roof slope for clay and concrete tile. 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.

Roof slope equivalents as rise. Wood shingles require a minimum roof pitch of 3 12 or greater. Minimum pitch for metal roof. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.