Calculating Square Footage Of Sloped Roof

Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.

Calculating square footage of sloped roof.

A square simply refers to a 10 x 10 square of roofing. This is simply 100 square feet of roof. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. Shingles and other roofing materials such as underlayment are typically measured in squares that are 10 feet long and 10 feet wide with each square measuring 100 square feet.

For example a single sloping roof covering a house 30 feet long and 20 feet wide covers an area of 600 square feet 30 x 20 600. 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. Square the result of step 1. Straight to the answer divide your roof pitch by 12.

So keeping with our roof pitch of 4 this gives us 1 9. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. The answer is the number of roofing squares for the roof. When calculating square footage for your roof always add at least 10 percent of the total to account for waste.

Once you have your roof s pitch divide the number by 12. Adding 1 gives us 1 1 9 10 9. If your number is 1 3. The calculator cannot account for complex shapes based on a measurement of square footage alone.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing. For instance if the roof is 1550 square feet then it is 16 squares. Next square your result.

Add 1 then take the square root. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Roof pitch calculator roof slope calculator the roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. For example if your roof s pitch is 4 in 12 you would.

Estimate the pitch of the roof. Roof pitch is given as the number of inches in height change over the distance of one foot. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. To find the squares divide the overall roof area by 100 and then round up.