Roof Pitch Conversion

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

Roof pitch conversion.

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. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Roof pitch and corresponding angles. Sloped roof pitch conversion correct horizontally measured roof area to its actual pitched area where pitch is defined as rise over run.

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. 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 a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

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. 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.