1 In 12 Roof Pitch

Roof pitch is used to describe the slope or angle of the roof.

1 in 12 roof pitch.

Image 1 12 to 12 12 roof pitch 7 12 pitch. Definitions vary on when a roof is considered pitched. Roofs on victorian era houses were often sharply angled with a steep pitch. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

A 12 to 24 pitch is expressed as 1 2. A roof with a 6 rise for every 12 run has a 6. Since this is a flat roof or nearly flat roof. 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.

This pitch might be as low as 1 12. 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 exact roof slope in degrees is given by the arctangent. If this isn t practical then perform the same measurement on the underside of the roof.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. 1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.

The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. We included a roof pitch chart below the 7 12 example image and the calculator below that. The pitch fraction represents a certain amount of vertical rise over the entire span. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

In degrees 10 2 in 12 or 1 in 6 is considered a minimum. It was fashionable for modern style homes built in the 1960s to have little pitch just a barely negligible slope to help drain water. For example given a roof with a rise of 4 feet and a span of 24 feet the pitch is 1 to 6 pitch which can be expressed as the fraction of 1 6. Thus pitch is typically greater in areas of high rain or snowfall.

The pitch can be expressed numerically as a fraction. 0 pitch 1 00x the roof area. 1 12 roof pitch angle 4 76 degrees. Roof pitch degree table.