15 Degree Roof Pitch

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.

15 degree roof pitch.

Divide the first part of the ratio by 12 to work out the pitch. Steeper slopes increase the sail effect that makes them susceptible to wind. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. To see roof pitch visual examples how to determine pitch.

Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees. Find the inverse tangent of the pitch to find the angle in degrees. 8 12 pitch 33 75 degrees. But with the use of a roof pitch in degrees converter you will be able to get the correct measurement.

You have to pay higher cost for steeper pitch. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. Measurement of your house roof pitch is one of the most important things while constructing pitched roof. 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.

Lower slopes don t handle wind driven rain as well. 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. 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.

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

Drag sliders to animate the results and diagram. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The triangle diagram will be re drawn to scale with all dimensions marked.

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.