Using A Roof Pitch Finder

The triangle shaped square was invented in 1925 by albert swanson to provide a quick accurate method for marking rafters.

Using a roof pitch finder.

This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. 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. Enter any angle or fraction of angle to find pitch. No fooling around with tape measures and levels.

Position your level against the roof until the bubble of the vial sits between two lines. 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. Finding the pitch of a roof is simple with a speed square. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.

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. Calculate the rafter length substituting these values into the following formula. Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. Enter any pitch or fraction of pitch to find angle.

Pitch rise run 1 5 6 25. Take the measurement of the vertical. You ll need a level that is 12 or longer and a tape measure. Let s say it is equal to 1 5 m.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Before taking any measurements you must first confirm that it s safe to walk on your roof. Most angle finders only work on the top side of a roof. But did you know that simple data already printed on your framing square can give key roof slope and rafter data.

Check the surface of the. The roof pitch is a measure of roof steepness. The swanson speed square is a popular tool with most carpenters. The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r.

Measure the rise of your roof. This handy little tool is the easiest way to accurately find your roof pitch. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.