15 Degree Roof Pitch

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

15 degree roof pitch.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. But with the use of a roof pitch in degrees converter you will be able to get the correct measurement. Find the inverse tangent of the pitch to find the angle in degrees. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.

The triangle diagram will be re drawn to scale with all dimensions marked. 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. Steeper slopes increase the sail effect that makes them susceptible to wind. 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.

Divide the first part of the ratio by 12 to work out the pitch. 8 12 pitch 33 75 degrees. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

Lower slopes don t handle wind driven rain as well. To convert between american roofing ratios and pitch degrees follow these steps. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees.

Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. You have to pay higher cost for steeper pitch. To see roof pitch visual examples how to determine pitch. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.

A 12 12 pitch roof has a pitch angle of 45. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Drag sliders to animate the results and diagram. 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.

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.