1 2 12 Roof Pitch

We included a roof pitch chart below the 7 12 example image and the calculator below that.

1 2 12 roof pitch.

Roof pitch designations are comprised of two numbers indicating a ratio. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. 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.

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 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Most roof s have a pitch in the 4 12 to 9 12 range. 2 12 roof pitch angle 9 46 degrees. Lower slopes don t handle wind driven rain as well. The steep roof of the tropical papua new guinea longhouse for example sweeps.

If this isn t practical then perform the same measurement on the underside of the roof. Or the colon can replace the slash as in 2 12 or 7 12. 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. Contemporary houses often have flat roofs which shouldn.

Steeper slopes increase the sail effect that makes them susceptible to wind. Thus pitch is typically greater in areas of high rain or snowfall. What is the standard pitch for a roof. If a roof rises 2 in a length of 12 this is 2 12 roof pitch.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Pitch is the term used to describe the angle slope or slant of your roof. Roof pitch degree table. 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.

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.