Estimate Square Footage Of A Roof

Multiply the square footage of your roof by 1 to get the 10 percent waste allowance.

Estimate square footage of a roof.

Next find the square footage of the metal roofing panels you want to use. Multiply the footprint square footage by the multiplier for your roof pitch to find the actual square footage of the roof. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. When calculating roofing costs per square asphalt shingles run from 350 and 500 per square metal or tin roofs costs 600 to 1 200 per square and concrete or clay costs between 1 200 and 1 800 per square.

The total amount of roofing material you need is 17 300 1 730 19 030 square feet. This gable roof has two planes. For example this shed roof has one roof plane. So multiply length a x.

The calculator cannot account for complex shapes based on a measurement of square footage alone. The first step in a free roofing estimate is measuring the roof dimensions. 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. To find the squares divide the overall roof area by 100 and then round up.

Finally calculate your roof s total square footage by simply adding the square footage of each of the planes together. A square simply refers to a 10 x 10 square of roofing. 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. Estimate the pitch of the roof.

The answer is the number of roofing squares for the roof. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Roofing cost per square foot. How to estimate roofing materials.

You will need to express this size in terms of square feet. For instance if the roof is 1550 square feet then it is 16 squares. Simply measure length a x width b. Although roofing projects are estimated and sold by the square.

Measure the length and width in feet then multiply together to find the square footage. To conclude the example if your total roofing area is 17 300 square feet your waste allowance would be 17 300 x 1 1 730 square feet. 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. This is simply 100 square feet of roof.

Use our roof pitch calculator to find the pitch of your roof. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. A x b 120 x 100 12 000 sq.