How To Find Square Footage Of A Roof

On a multistory house use only the square footage of a single floor.

How to find square footage of a roof.

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. Minor differences in calculations occur based on chimneys and other. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

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. When calculating square footage for your roof always add at least 10 percent of the total to account for waste. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. Use this information if.

The first step in a free roofing estimate is measuring the roof dimensions. The calculator cannot account for complex shapes based on a measurement of square footage alone. Then add 10 to the number to account for waste. Use only the square footage directly covered by the roof.

Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. You will need to express this size in terms of square feet. To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the 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.