Using A Roof Pitch Finder

Most angle finders only work on the top side of a roof.

Using a roof pitch finder.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. The pitch is defined as the slope of the roof and is commonly represented as the ratio of the rise over the run in the form x 12. How to obtain roof pitch or slope by using the rafter tables on a framing square measuring the roof slope pitch or rise and run is easy if you ve got a tape measure and more accurate still if you ve also got a level on hand. The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r.

Position your level against the roof until the bubble of the vial sits between two lines. Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. Take a measurement of 12 inches using a level. You ll need a level that is 12 or longer and a tape measure.

Before taking any measurements you must first confirm that it s safe to walk on your roof. The roof pitch is a measure of roof steepness. Finding the pitch of a roof is simple with a speed square. Measure the rise of your roof.

But did you know that simple data already printed on your framing square can give key roof slope and rafter data. This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. The triangle shaped square was invented in 1925 by albert swanson to provide a quick accurate method for marking rafters.

Enter any angle or fraction of angle to find pitch. The swanson speed square is a popular tool with most carpenters. The rise is the height of the roof at its highest point and the run is the horizontal span of the roof measured from the roof ridge to the side of the building. Check the surface of the.

This handy little tool is the easiest way to accurately find your roof pitch. No fooling around with tape measures and levels. Calculate the roof pitch as the proportion of rise and run. Pitch rise run 1 5 6 25.

Let s say it is equal to 1 5 m. Simply set it on your roof or the underside of a rafter and read the gauge. Calculate the rafter length substituting these values into the following formula.