12 Degree Roof Pitch

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

12 degree roof pitch. 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. Steeper slopes increase the sail effect that makes them susceptible to wind. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options. Angle the angle of a roof is the same as the roof s slope except instead of being.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. To convert between american roofing ratios and pitch degrees follow these steps. Thus pitch is typically greater in areas of high rain or snowfall.

But how are going to determine the angle s degree. The exact roof slope in degrees is given by the arctangent. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. The following are important details to better understand this conversion.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Lower slopes don t handle wind driven rain as well. Roof pitch calculator results explained. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Definitions vary on when a roof is considered pitched. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Find the inverse tangent of the pitch to find the angle in degrees. A 12 12 pitch roof has a pitch angle of 45. What degree angle is a 12 12 pitch roof. Divide the first part of the ratio by 12 to work out the pitch.

Most roof s have a pitch in the 4 12 to 9 12 range. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Also roof pitch angle is sometimes referred to as 12 12 6 12 8 12 and so forth.