1 2 12 Roof Pitch

Most roof s have a pitch in the 4 12 to 9 12 range.

1 2 12 roof pitch.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Roof pitch designations are comprised of two numbers indicating a ratio. Pitch is the term used to describe the angle slope or slant of your roof. What is the standard pitch for a roof.

Or the colon can replace the slash as in 2 12 or 7 12. Roof pitch defined and explained. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. 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. There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided. Roof pitch degree table. Image 1 12 to 12 12 roof pitch 7 12 pitch.

Lower slopes don t handle wind driven rain as well. If this isn t practical then perform the same measurement on the underside of the roof. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. The steep roof of the tropical papua new guinea longhouse for example sweeps.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. The exact roof slope in degrees is given by the arctangent. Steeper slopes increase the sail effect that makes them susceptible to wind. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 2 12 roof pitch angle 9 46 degrees. 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.