15 Degree Roof Slope

Find the inverse tangent of the pitch to find the angle in degrees.

15 degree roof slope.

To convert between american roofing ratios and pitch degrees follow these steps. A 12 12 pitch roof has a pitch angle of 45. What degree angle is a 12 12 pitch roof. 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.

Divide the first part of the ratio by 12 to work out the pitch. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

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. 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. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Lower slopes don t handle wind driven rain as well. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. But with the use of a roof pitch in degrees converter you will be able to get the correct measurement.

Steeper slopes increase the sail effect that makes them susceptible to wind.