27 Degree Roof Pitch

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

27 degree roof pitch. To see roof pitch visual examples how to determine pitch. Also see our page quick reference. A 12 12 pitch roof has a pitch angle of 45. Degrees to roof pitch rise in run to see a table.

To convert between american roofing ratios and pitch degrees follow these steps. 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. Divide the first part of the ratio by 12 to work out the pitch. What degree angle is a 12 12 pitch roof.

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. Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees. 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. Lower slopes don t handle wind driven rain as well.

It s just a little math. 8 12 pitch 33 75 degrees. 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.

Find the inverse tangent of the pitch to find the angle in degrees. Measurement of your house roof pitch is one of the most important things while constructing pitched roof. Using pitch its footprint and basic geometry you can quickly and with a high degree of accuracy calculate the length of the gable sides. 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.

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. See below after the table for directions on how to convert any roof slope from one form to another even roof slopes not shown in the table. For example a 3 pitch or 3 in 12 pitch or 3 12 pitch all mean that the roof rises 3 inches for every 12 inches of it s horizontal run. 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. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. 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.