Formula For Square Footage Of A Roof

The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials.

Formula for square footage of a roof.

A square simply refers to a 10 x 10 square of roofing. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. 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.

The answer is the number of roofing squares for the roof. The result is the total square footage of your 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. Multiply this number by your most recent result to get the estimated square footage of your roof.

Convert the area to roofing squares. 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. To find the squares divide the overall roof area by 100 and then round up. 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.

Add the square footage for all the planes together. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. 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. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size.

The only difference in this calculation to the one for a gable roof area is the amount of the ridge. Calculate or enter the square footage of the attic or area to be vented. This is a rather complicated way to estimate a roof area and hardly suited to the diy fans. 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.

Once you have your roof s pitch divide the number by 12. From the diagrams there are two intersecting roofs measuring 114 feet and 30 feet at the eaves with equal rake of 18 feet.