How Much Pitch For A Patio Roof

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.

How much pitch for a patio roof.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Since most building codes require a pitch of at least one quarter inch per 12 inches you should anticipate that the angle of your roof will be at least 4 degrees. If you plan to have overhang etc.

A roof that slopes 12 inches for every 12 inches would have a 45 degree angle. You could also opt for a pvc flat roofing membrane. Most roof s have a pitch in the 4 12 to 9 12 range. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run.

As aforementioned there is no standard pitch of a roof. If the pitch of your roof is 6 inches per 2 inches the angle would be 26 5 degrees. We included a roof pitch chart below the 7 12 example image and the calculator below that. If this isn t practical then perform the same measurement on the underside of the roof.

Smallest roof pitch the smallest pitch of a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The table below shows common roof pitches and the equivalent grade degrees and radians for each. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.

When you are building a patio from scratch you will have no trouble making sure that it is sloped correctly. However you can only use this pitch with built up roofing or specialized synthetic roofing. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

The recommended slope is 1 4 inch per foot but it can be anywhere from 1 8 inch to 3 8 inch per foot depending on other factors. Covered porches that are near trees or in areas with heavy rains should not be covered with a low slope roof. Such a small pitch can only work with built up roofing or specialized synthetic roofing.