How To Figure Square Footage Of A Pitched Roof

If this distance measures 4 inches you have a 4 in 12 pitch.

How to figure square footage of a pitched roof.

The number you get will be an accurate estimate of how much area you have to cover for your roofing project. Then take the product of these two dimensions and multiply it by your pitch multiplier. Outside of the u s a degree angle is typically used. So if you divide your answer of a product of length times height by two you will get the area of a triangle.

Use our roof pitch calculator to find the pitch of your roof. 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 example a 4 12 pitch roof that is 100 square feet. To conclude the example if your total roofing area is 17 300 square feet your waste allowance would be 17 300 x 1 1 730 square feet.

8 inches and you have an 8 in 12 pitch. Straight to the answer. Estimate the pitch of the roof. The answer is the number of roofing squares for the roof.

Roof pitch is given as the number of inches in height change over the distance of one foot. Pitch measurement method 1. The pitch of the roof is the rise over a 12 inch run. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.

Divide your roof pitch by 12. 1 roof square 100 square feet. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. So keeping with our roof pitch of 4 this gives us 1 9.

100 1 054 105 4ft 2. Multiply the square footage of your roof by 1 to get the 10 percent waste allowance. This would yield 1 3. The total amount of roofing material you need is 17 300 1 730 19 030 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. Add 1 then take the square root. If you don t want to do a lot of measuring you can use your pitch calculation to get an estimated square footage of your roof. Dividing by 12 gives the.

Square the result of step 1. The length l times the height h of a triangle is twice its area a2. Roof pitch area multipliers. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. L h 2 area calculating an area of a triangle when estimating a roof.