Formula For Square Footage Of A Roof

Roofing contractors estimate projects and materials by the square so it is crucial to find this measurement to accurately estimate the amount of material needed.

Formula for square footage of a roof.

This is a rather complicated way to estimate a roof area and hardly suited to the diy fans. Calculate or enter the square footage of the attic or area to be vented. From the diagrams there are two intersecting roofs measuring 114 feet and 30 feet at the eaves with equal rake of 18 feet. The only difference in this calculation to the one for a gable roof area is the amount of the ridge.

If for example the total square footage for the examples used so far would be 14 400 the rectangular plane plus 900 the triangle plus 2 000 the irregular shape 17 300 square feet. 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. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials.

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. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. Convert the area to roofing squares. The result is the total square footage of your roof.

Add the square footage for all the planes together. To find the squares divide the overall roof area by 100 and then round up. The answer is the number of roofing squares for the roof. 1 300 x 1 05 1 365 square feet calculating the area true if you want to get the exact area measurement for your roof you can follow these steps.

Build your roof empowers you to select each layer and component that goes into your total protection roofing system so that you get the roof you want to protect your home. The calculator cannot account for complex shapes based on a measurement of square footage alone. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. This is simply 100 square feet of roof.

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. Multiply this number by your most recent result to get the estimated square footage of your roof.