13 12 Roof Pitch

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

13 12 roof pitch. 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. 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. What is the standard pitch for a roof.

Pitch is the term used to describe the angle slope or slant of your roof. A 12 in 12 pitch is a steep 45 degree angle roof. If a roof rises 1 in a length of 12 this is 1 12 roof pitch. We included a roof pitch chart below the 7 12 example image and the calculator below that.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Image 1 12 to 12 12 roof pitch 7 12 pitch. If this isn t practical then perform the same measurement on the underside of the roof. Roof pitch degree table.

Roof pitch defined and explained. Steeper slopes increase the sail effect that makes them susceptible to wind. Roof pitch designations are comprised of two numbers indicating a ratio. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. Most roof s have a pitch in the 4 12 to 9 12 range. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Contemporary houses often have flat roofs which shouldn.

See the image below for more explanation on rise run and pitch. 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 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. Or the colon can replace the slash as in 2 12 or 7 12.

The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.