12 Degree Roof Pitch

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.

12 degree roof pitch.

A 12 12 pitch roof has a pitch angle of 45. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Angle the angle of a roof is the same as the roof s slope except instead of being. To convert between american roofing ratios and pitch degrees follow these steps.

The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. What degree angle is a 12 12 pitch roof. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. 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.

Roof pitch calculator results explained. 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. Lower slopes don t handle wind driven rain as well.

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. Thus pitch is typically greater in areas of high rain or snowfall. The following are important details to better understand this conversion. In degrees 10 2 in 12 or 1 in 6 is considered a minimum.

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. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. Find the inverse tangent of the pitch to find the angle in degrees. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

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. Steeper slopes increase the sail effect that makes them susceptible to wind. Most roof s have a pitch in the 4 12 to 9 12 range. The exact roof slope in degrees is given by the arctangent.

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 table below shows common roof pitches and the equivalent grade degrees and radians for each. Also roof pitch angle is sometimes referred to as 12 12 6 12 8 12 and so forth.