Roof Slope 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 slope degrees.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. For example in construction you may refer to the pitch of a roof or the grade of a slab. Sometimes slope is referred to as pitch angle rise incline or grade.

Degrees tan 1 43 calculated out this gives an angle of 23 27 degrees. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. 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.

Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Steeper slopes increase the sail effect that makes them susceptible to wind. The value displayed as the rise will be your x. 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. Both are referring to angles.

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. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length. Pitch tan angle use this when you express the angle of the roof pitch in degrees what is the standard pitch of a roof. Lower slopes don t handle wind driven rain as well.

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. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of. Pitch tan angle where angle is the roof pitch expressed in degrees.