Roof Pitch Off By Inches

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

Roof pitch off by inches.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. However you can only use this pitch with built up roofing or specialized synthetic roofing. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.

For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. A roof with a 6 rise for every 12 run has a 6.

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. Divide the results by the number of 12 inch segments in your level. Roof pitch is used to describe the slope or angle of the roof.