7 Best Of How To Determine Roof Pitch With Framing Square Best Images PNG. The pitch of the roof is read where the bottom of the rafter crosses this scale. Scale parallel with the 45-degree angle of the square.
Hold a torpedo level flat against the lip of the fence and adjust the height of the square until the bubble inside the level is centered. In the United States a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. For instance a 712 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Place the straightedge on the shingles in a direction perpendicular to the gutter.
13412 is the unit rise in inches per foot of our example roof run. If you want to find the roof pitch in the form of x12 simply calculate the pitch and substitute 12 for the run length. This is useful because sometime you may need to cut a bevel with your circular saw that is not calibrated using roof pitch. This is the wider and longer arm of the L normally 2.