Measure Roof Slope Angles

This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

Measure roof slope angles.

To calculate total rise if i knew the total run say we had made an on roof measurement we take the following steps. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run. The most precise way to find the roof s slope is by measuring it from the underside.

The marvellous roof pitch calculator measures angle pitch length and slope how to calculate roof rafters photo below is part of 10 how to calculate roof rafters write up which is listed within ideas how to calculate gable roof rafters how to calculate gambrel roof rafters how to calculate hip roof rafters how to calculate roof rafter angles how to calculate roof rafter cuts. No fooling around with tape measures and levels. Access one of the rafters then take the measurement this way. 0 1583 rise run.

Total rise total run in feet x rise per foot the tan value for my 9 degree slope roof tan 9 0 1583. This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. For example if the level is four inches from the soffit and the 12 inch mark the pitch. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Measure from the top of the level at the 12 inch mark up to where the tape measure touches the soffit again. 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. Calculate unit rise for the roof rise. This handy little tool is the easiest way to accurately find your roof pitch.

Most angle finders only work on the top side of a roof. Locate the level s 12 inch mark.