1 In 12 Roof Pitch

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.

1 in 12 roof pitch.

This pitch might be as low as 1 12. It was fashionable for modern style homes built in the 1960s to have little pitch just a barely negligible slope to help drain water. Visually this roof appears flat. 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.

If this isn t practical then perform the same measurement on the underside of the roof. Definitions vary on when a roof is considered pitched. The exact roof slope in degrees is given by the arctangent. The pitch fraction represents a certain amount of vertical rise over the entire span.

In degrees 10 2 in 12 or 1 in 6 is considered a minimum. If a roof rises 1 in a length of 12 this is 1 12 roof pitch. Roof pitch degree table. 1 12 roof pitch angle 4 76 degrees.

A roof with a 6 rise for every 12 run has a 6. You can go by the measurements taken by walking the roof. 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. 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. The pitch can be expressed numerically as a fraction. Think of a classic addams family haunted house with its soaring peaks and you have a. 0 pitch 1 00x the roof area.

Roofs on victorian era houses were often sharply angled with a steep 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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. A 12 to 24 pitch is expressed as 1 2.

Image 1 12 to 12 12 roof pitch 7 12 pitch. Thus pitch is typically greater in areas of high rain or snowfall. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.