Roof pitch calculator results explained.
Peak roof height.
If your goal is to only calculate the roof height do not enter any numbers in wall height field and only use building width and roof pitch fields.
Conventional slope roof range between 4 in 12 and 8 in 12.
The run always remains constant at 12 inches.
The pitch of a roof determines the height of the ridge board that runs the length of the house.
A flat roof has a slope of 2 in 12 or less.
A low slope roof is anywhere from 2 in 12 to 4 in 12.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
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.
Carpenters measure roof pitch as inches of rise per 12 inches of run.
To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter.
As a reminder please don t forget to add height of rafter thickness of roofing material and ridge vent to the number that you ll get using our calculator.
A 1 in 12 roof pitch roof rises 1 inch for every 12 inches of run.
Use the roof pitch to find the height of a roof peak.