Measuring Roof Pitch Angle

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Measuring roof pitch angle. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10. Find the inverse tangent of the pitch to find the angle in degrees. Now divide the rise by the multiplier to get the pitch eg. Take the measurement of the vertical.

Take a measurement of 12 inches using a level. Roof pitch and corresponding angles. Rafter height width from pythagoras remember that at school so. A 12 12 pitch roof has a pitch angle of 45.

It always makes sense to the standard roof pitch angle spot on as the benefits of doing so are quite obvious. If you want to know how to find the pitch of a roof then start with a calculator. Take your pitch percent and press shift maybe 2nd function on your calculator then press tan and. 48 10 4 8.

Check the surface of the. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. To convert between american roofing ratios and pitch degrees follow these steps. How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

The calculator above can handle much of this math. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Position your level against the roof until the bubble of the vial sits between two lines. Divide the height of your roof by the width not the full width if you ve measured the full width wall to wall divide.

The pitch of this roof is 4 8 12. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. With the help of these roof pitch degree calculator programs you can make sure that your home is nice and balanced.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Before taking any measurements you must first confirm that it s safe to walk on your roof.