Roof Pitch Level

Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

Roof pitch level.

Roof pitch refers to the slope which the rafter creates. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. In building construction roof pitch is the steepness of a roof quantified as a ratio or as number of angular degrees that one exposure surface deviates from horizontal level. 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.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. 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. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12.

Divide the results by the number of 12 inch segments in your level. 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. Pitches above 9 12 are very highly angled and are designated steep slope roofs.

A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. First measure 12 inches from one end of the level and make a mark.