How to calculate the pitch of a roof method one.
Pitch my roof.
Measure from the attic.
Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
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 value displayed as the rise will be your x.
One method to find the pitch is to climb on the roof and measure the rise for a 12.
Pitch tan angle where angle is the roof pitch expressed in degrees.
First measure 12 inches from one end of the level and make a mark.
Take a measurement of 12 inches using a level.
Take the measurement of the vertical.
Check the surface of the.
Position your level against the roof until the bubble of the vial sits between two lines.
Measure from the roof.