1 Degree Roof Pitch

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

1 degree roof pitch.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Low slope roofing needs special techniques and materials in order to avoid leaks and roof damage and it ranges from 1 12 4 12. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. 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.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Find the inverse tangent of the pitch to find the angle in degrees. A 12 12 pitch roof has a pitch angle of 45. Divide the first part of the ratio by 12 to work out the pitch.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Drag sliders to animate the results and diagram. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. Roof pitch defined and explained.

Or the colon can replace the slash as in 2 12 or 7 12. Roof pitch designations are comprised of two numbers indicating a ratio. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.

To convert between american roofing ratios and pitch degrees follow these steps. What degree angle is a 12 12 pitch roof. 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. How to convert roof pitch in degrees converting this mathematical formula is not that easy especially if you don t have a lot of skill when it comes to math.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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. 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.