1 2 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.

1 2 12 pitch roof.

Conventional from 4 12 1 in 3 to 9 12 3 in 4. Most roof s have a pitch in the 4 12 to 9 12 range. If this isn t practical then perform the same measurement on the underside of the roof. Roof pitch designations are comprised of two numbers indicating a ratio.

A 12 12 pitch roof has a pitch angle of 45. What degree angle is a 12 12 pitch roof. We included a roof pitch chart below the 7 12 example image and the calculator below that. Divide the first part of the ratio by 12 to work out the pitch.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Roof pitch defined and explained. Pitch is the term used to describe the angle slope or slant of your roof. 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 ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Roof pitch degree table. Or the colon can replace the slash as in 2 12 or 7 12. To convert between american roofing ratios and pitch degrees follow these steps.

Steeper slopes increase the sail effect that makes them susceptible to wind. If a roof rises 1 in a length of 12 this is 1 12 roof pitch. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. Image 1 12 to 12 12 roof pitch 7 12 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. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. The combination of two numbers are used to display or show the roof pitch. Low slope roofing which requires special materials and techniques to avoid leaks and ranges from 1 12 2 12 to 4 12 1 in 3.

Lower slopes don t handle wind driven rain as well. 1 12 roof pitch angle 4 76 degrees. Find the inverse tangent of the pitch to find the angle in degrees.