1 Degree Roof Pitch

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

1 degree roof pitch. Drag sliders to animate the results and diagram. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Low slope roofing needs special techniques and materials in order to avoid leaks and roof damage and it ranges from 1 12 4 12. Pitch is the term used to describe the angle slope or slant of your roof.

Roof pitch designations are comprised of two numbers indicating a ratio. Steeper slopes increase the sail effect that makes them susceptible to wind. 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. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

The triangle diagram will be re drawn to scale with all dimensions marked. Or the colon can replace the slash as in 2 12 or 7 12. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

Find the inverse tangent of the pitch to find the angle in degrees. To convert between american roofing ratios and pitch degrees follow these steps. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

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. 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 table below shows common roof pitches and the equivalent grade degrees and radians for each. Divide the first part of the ratio by 12 to work out the pitch.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 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. A 12 12 pitch roof has a pitch angle of 45. Roof pitch defined and explained.

Lower slopes don t handle wind driven rain as well.