Figuring Square Footage Of A Roof

Calculate square footage for a roof by measuring and by performing some basic math equations.

Figuring square footage of a roof.

The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares. The calculator cannot account for complex shapes based on a measurement of square footage alone.

When calculating square footage for your roof always add at least 10 percent of the total to account for waste. 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. With the area measurement you can learn the approximate cost of a new roof. Calculate the square footage area of a hip roof.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. 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. The only difference in this calculation to the one for a gable roof area is the amount of the ridge. 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.

Use this information if. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. So continuing our example if you ve got a two story house with a total square footage of 2 700 square feet with each floor having 1 350 square feet multiply 1 350 by 1 0541 to get 1 423 square. However shingles are packaged in a way that they are light enough for the average person to carry around.

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.