Before taking any measurements you must first confirm that it s safe to walk on your roof.
Pitch my roof.
First measure 12 inches from one end of the level and make a mark.
Check the surface of the.
Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
Measure from the roof.
Take the measurement of the vertical.
Position your level against the roof until the bubble of the vial sits between two lines.
Take a measurement of 12 inches using a level.
The value displayed as the rise will be your x.
If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length.
Pitch tan angle where angle is the roof pitch expressed in degrees.
Measure from the attic.
One method to find the pitch is to climb on the roof and measure the rise for a 12.