Roof Pitch Degrees

The 45 degree roofs seen on a frame houses are 12 in 12 but roofs can be even steeper consider the mansard roofs introduced by french second empire architects in the middle of the 1800s.

Roof pitch degrees.

8 12 pitch 33 75 degrees. The following diagram will let you easily convert roof pitch to degrees. 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 slope which the rafter creates.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Pitched roofs begin with with slopes greater than 3 in 12. 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. In the usa the range of standard pitches is anywhere between 4 12 and 9 12.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. 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. Roof pitch and corresponding angles. Roof pitch to degrees equivalents this drawing demonstrates how many degrees rise for each pitch of a typical roof.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. A 7 12 pitch equals 30 26 degrees. Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

But with the use of a roof pitch in degrees converter you will be able to get the correct measurement. Mansard roofs with nearly vertical faces can boast a pitch of 20 in 12. There is no standard universal roof pitch.