15 Degree Roof Slope

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

15 degree roof slope.

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. Lower slopes don t handle wind driven rain as well. To convert between american roofing ratios and pitch degrees follow these steps. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.

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. What degree angle is a 12 12 pitch roof. Find the inverse tangent of the pitch to find the angle in degrees. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

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. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. 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. Divide the first part of the ratio by 12 to work out the pitch.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. A 12 12 pitch roof has a pitch angle of 45. 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.

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.