How To Find Square Footage Of A Roof

Use only the square footage directly covered by the roof.

How to find square footage of a roof.

Then add 10 to the number to account for waste. The calculator cannot account for complex shapes based on a measurement of square footage alone. Use this information if. On a multistory house use only the square footage of a single floor.

Calculate square footage for a roof by measuring and by performing some basic math equations. You will need to express this size in terms of square feet. Minor differences in calculations occur based on chimneys and other. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. 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. 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.

With the area measurement you can learn the approximate cost of a new 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. 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. The first step in a free roofing estimate is measuring the roof dimensions.