How To Determine Roof Square Footage

If you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof.

How to determine roof square footage.

Then take the product of these two dimensions and multiply it by your pitch multiplier. This is simply 100 square feet of roof. Measure the ground dimensions of the house using a tape measure and write down these dimensions. 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. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Calculate each plane separately. You will need to express this size in terms of square feet.

A square simply refers to a 10 x 10 square of roofing. The first step in a free roofing estimate is measuring the roof dimensions. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage. To find the squares divide the overall roof area by 100 and then round up.

First multiply the length by the width. If you measured in feet skip to calculate the area as square footage. Multiply the length by the width to arrive at. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.

Measure the length and width of every roof plane or surface. The number you get will be an accurate estimate of how much area you have to cover for your roofing project. Convert the area to roofing squares. Because each 100 square feet of roof is one roofing square divide.

Include dormers the small outjuttings over attic. Find the square footage of the roof. Multiply the length and width of each square or rectangle shaped plane. If you measured in another unit of measure do the following to convert to feet.

For instance if the roof is 1550 square feet then it is 16 squares. 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. How do you calculate square footage for a roof. 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.

Divide by 12 and that is your measurement in feet. Multiply the area by the pitch multiplier to get the roof s square footage.