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.

Or the colon can replace the slash as in 2 12 or 7 12. We included a roof pitch chart below the 7 12 example image and the calculator below that. Steeper slopes increase the sail effect that makes them susceptible to wind. 1 12 roof pitch angle 4 76 degrees.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Roof pitch designations are comprised of two numbers indicating a ratio.

Lower slopes don t handle wind driven rain as well. Image 1 12 to 12 12 roof pitch 7 12 pitch. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. 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.

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. 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.

To convert between american roofing ratios and pitch degrees follow these steps. Find the inverse tangent of the pitch to find the angle in degrees. A 12 12 pitch roof has a pitch angle of 45. Roof pitch defined and explained.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. 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. If a roof rises 1 in a length of 12 this is 1 12 roof 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The combination of two numbers are used to display or show the roof pitch.