Measure Roof Pitch With Square

Feet then you will have 20 squares.

Measure roof pitch with square.

Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. 2 000 100 20. Use one of these three methods below to calculate your roof s pitch. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10.

Estimate or calculate the pitch of your roof low medium or high. The hash marks with corresponding numbers between 1 and 30 refer to the roof s rise angle. Roofing pitch for square roof area finally the more complex part measuring your roof s pitch. Place the pivot point against the shingles.

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. The total run is the distance from the peak to the edge of the roof which in this case is the total width divided in half which is equal to 10 feet or 120 inches. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. If your roof is 2 000 sq.

The maths behind this number is that it is the square root of rise run 2 1. 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. Note the number on the common scale parallel with the 45 degree angle of the square. Read the pitch on the side of the rafter square.

Roof pitch area multipliers. If this distance measures 4 inches you have a 4 in 12 pitch. It is often compared to slope but is not exactly the same. With a torpedo level and a speed square you can pretty accurately gauge the pitch of any roof with a gable end photo 1.

If its pitch is 6 in 12 a pitch multiplier of 1 12 multiplying 1 152 sq ft 107 0 m 2 by 1 12 would give you an overall square footage of 1 290 square feet 120 m 2. The pitch of the roof is read where the bottom of the rafter crosses this scale. Then place a torpedo level on the fat base of the rafter square and adjust the square until the level is level. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

Use our roof pitch calculator to find the pitch of your roof. To calculate the required rafter length multiply the total run length half the building width plus the width that the roof is to overhang the house wall by this number 13 42. Pitch measurement method 1. For example a 4 12 pitch roof that is 100 square feet.

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. You ll need a level and a tape measure or ruler. 8 inches and you have an 8 in 12 pitch. The pitch of the roof is the rise over a 12 inch run.