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.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. 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 also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.

Divide the results by the number of 12 inch segments in your level. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. The most commonly used roof pitches fall in a range between 4 12 and 9 12. Roof pitch refers to the slope which the rafter creates.

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. 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. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. A roof surface may be either functionally flat or pitched.

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.