1 2 12 Roof Pitch

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.

1 2 12 roof pitch.

Image 1 12 to 12 12 roof pitch 7 12 pitch. Thus pitch is typically greater in areas of high rain or snowfall. 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. 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. Roof pitch designations are comprised of two numbers indicating a ratio. 2 12 roof pitch angle 9 46 degrees. 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. Lower slopes don t handle wind driven rain as well. 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.

If this isn t practical then perform the same measurement on the underside of the roof. Contemporary houses often have flat roofs which shouldn. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. What is the standard pitch for a 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. Steeper slopes increase the sail effect that makes them susceptible to wind. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

The exact roof slope in degrees is given by the arctangent. Most roof s have a pitch in the 4 12 to 9 12 range. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. We included a roof pitch chart below the 7 12 example image and the calculator below that.

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.