Estimate Square Footage Of A Roof

Next find the square footage of the metal roofing panels you want to use.

Estimate square footage of a roof.

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. For the total square footage of the 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.

So multiply length a x. For example this shed roof has one roof plane. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. For instance if the roof is 1550 square feet then it is 16 squares.

How to estimate roofing materials. 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. Estimate the pitch of the roof. Measure the length and width in feet then multiply together to find the square footage.

Simply measure length a x width b. Although roofing projects are estimated and sold by the square. Roofing cost per square foot. Finally calculate your roof s total square footage by simply adding the square footage of each of the planes together.

To find the squares divide the overall roof area by 100 and then round up. The total amount of roofing material you need is 17 300 1 730 19 030 square feet. This gable roof has two planes. This is simply 100 square feet of roof.

A x b 120 x 100 12 000 sq. 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. 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. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.

Multiply the footprint square footage by the multiplier for your roof pitch to find the actual square footage of the roof. You will need to express this size in terms of square feet. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. 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.

Use our roof pitch calculator to find the pitch of your roof. If you are replacing your current roof add 125 to 500 per roofing square for old roof removal. The first step in a free roofing estimate is measuring the roof dimensions.