How To Determine Roof Pitch With Framing Square

This will the first point of the rafter measurement line.

How to determine roof pitch with framing square.

Roof framing rafter layout. Directly below the 6 inch mark on the framing square read the required rafter length 13 42 per foot of run for a 6 inch rise 6 in 12 roof. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Place the pivot point on the square against the bottom of the rafter and align the 90 degree angle side of the square with the pencil mark.

Use a level and a pencil to make a plumb vertical line on one face of an existing rafter. Move the tape measure along the the roof until it hits the level at exactly the 12 inch mark. Measure the vertical distance from roof to level. How to measure roof pitch with a speed square.

From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it. Hold the 0 mark of the tape measure against the roof. 8 inches and you have an 8 in 12 pitch. If this distance measures 4 inches you have a 4 in 12 pitch.

Pitch measurement method 1. Measure down y height from the long point of the rafter cut and make a mark.