20 Degree Roof Slope

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

20 degree roof slope.

Roof pitch on the form x 12 can be expressed in grades as. S grade 1 m 2 m 50 slope and roof pitch. Low slope roofs are from 0 to 3 12 in pitch. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch.

Some sources consider low slope to include 3 12 pitch roofs. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Steeper slopes increase the sail effect that makes them susceptible to wind. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. But with the use of a roof pitch in degrees converter you will be able to get the correct measurement. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. What degree angle is a 12 12 pitch roof.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. The table below shows common roof pitches and the equivalent grade degrees and radians for each. You can find the roof pitch in the form of x 12 like 4 12 or 9 12. Roof pitch is the slope created by the rafter.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

Example slope as grade. Find the inverse tangent of the pitch to find the angle in degrees. Notes to the table above. A 12 12 pitch roof has a pitch angle of 45.

To convert between american roofing ratios and pitch degrees follow these steps. Divide the first part of the ratio by 12 to work out the pitch. Lower slopes don t handle wind driven rain as well.