Roof Pitch Level

A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.

Roof pitch level.

The most commonly used roof pitches fall in a range between 4 12 and 9 12. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

A roof surface may be either functionally flat or pitched. 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. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Roof pitch refers to the slope which the rafter creates.

For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. First measure 12 inches from one end of the level and make a mark. Divide the results by the number of 12 inch segments in your level. 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.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.