1 2 12 Pitch Roof

The combination of two numbers are used to display or show the roof pitch.

1 2 12 pitch roof.

Roof pitch degree table. 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. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Roof pitch defined and explained. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

Steeper slopes increase the sail effect that makes them susceptible to wind. Roof pitch designations are comprised of two numbers indicating a ratio. 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. 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.

We included a roof pitch chart below the 7 12 example image and the calculator below that. Pitch is the term used to describe the angle slope or slant of your roof. Or the colon can replace the slash as in 2 12 or 7 12. Image 1 12 to 12 12 roof pitch 7 12 pitch.

What degree angle is a 12 12 pitch roof. Conventional from 4 12 1 in 3 to 9 12 3 in 4. Find the inverse tangent of the pitch to find the angle in degrees. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.

To convert between american roofing ratios and pitch degrees follow these steps. 1 12 roof pitch angle 4 76 degrees. If this isn t practical then perform the same measurement on the underside of the roof. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

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. 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.