Roof Pitch Conversion

Roof pitch and corresponding angles.

Roof pitch conversion.

If you can give them the exact chart and measurement that you like the look of they can work to those specifications. Roof pitch refers to the slope which the rafter creates. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12.

Horizontal measurement 2d measurement is typical when a pitched roof is measured from ground level blueprint or aerial photograph. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

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. Roof online staff last updated july 10 2020 the following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.