How To Figure Square Ft Of Roof

Include dormers the small outjuttings over attic.

How to figure square ft of roof. This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. How do you calculate square footage for a roof. How to estimate roofing materials. For instance if the roof is 1550 square feet then it is 16 squares.

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. Measure the length and width of every roof plane or surface. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. 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. Because each 100 square feet of roof is one roofing square divide. Multiply the length and width of each square or rectangle shaped plane. This is simply 100 square feet of roof.

Multiply the length by the width to arrive at. Measure your house at ground level then add in the roof s overhang for greater accuracy. Convert the area to roofing squares. To find the squares divide the overall roof area by 100 and then round up.

The first step in a free roofing estimate is measuring the roof dimensions. The calculator cannot account for complex shapes based on a measurement of square footage alone. A square simply refers to a 10 x 10 square of roofing. Measure the ground dimensions of the house using a tape measure and write down these dimensions.