Roof Square Footage Formula

The square footage of a hip roof area is identical to the square footage of a gable roof of the same size.

Roof square footage formula.

Convert the area to roofing squares. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. The only difference in this calculation to the one for a gable roof area is the amount of the ridge. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. Multiply this number by your most recent result to get the estimated square footage of your roof. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length. 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.

Feet then you will have 20 squares. The calculator cannot account for complex shapes based on a measurement of square footage alone. Roofing square conversion calculator now it s time to convert square feet into roofing squares. The answer is the number of roofing squares for the roof.

For example take an area made up of a triangle that s 20 feet high and has a base of 40 feet plus a square that s 40 feet by 40 feet. The first step in a free roofing estimate is measuring the roof dimensions. Divide any irregularly shaped areas of the roof into more manageable triangles and rectangles then calculate square footage for those individual elements and add them to get the total square footage. If your roof is 2 000 sq.

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. 2 000 100 20. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. 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.

You will need to express this size in terms of square feet. 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. This is pretty simple. Multiply by the square footage of a single floor of your house.

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. However shingles are packaged in a way that they are light enough for the average person to carry around.