1 2 12 Pitch Roof

If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

1 2 12 pitch roof.

Or the colon can replace the slash as in 2 12 or 7 12. What degree angle is a 12 12 pitch roof. If this isn t practical then perform the same measurement on the underside of the roof. Conventional from 4 12 1 in 3 to 9 12 3 in 4.

We included a roof pitch chart below the 7 12 example image and the calculator below that. 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. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Steeper slopes increase the sail effect that makes them susceptible to wind.

Roof pitch designations are comprised of two numbers indicating a ratio. 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. Roof pitch defined and explained. Lower slopes don t handle wind driven rain as well.

The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. Roof pitch degree table. Divide the first part of the ratio by 12 to work out the 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. The basic ranges of pitch are not uniformly defined but range from flat which are not perfectly flat but sloped to drain water up to 1 2 12 to 2 12 1 in 24 to 1 in 6. 1 12 roof pitch angle 4 76 degrees. Pitch is the term used to describe the angle slope or slant of your roof.

To convert between american roofing ratios and pitch degrees follow these steps. 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. 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. Most roof s have a pitch in the 4 12 to 9 12 range.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A 12 12 pitch roof has a pitch angle of 45.