How To Figure Square Ft Of Roof

Measure the length and width of every roof plane or surface.

How to figure square ft of roof.

The calculator cannot account for complex shapes based on a measurement of square footage alone. Roof pitches in degrees. This is simply 100 square feet of roof. How do you calculate square footage for a roof.

Measure your house at ground level then add in the roof s overhang for greater accuracy. 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. 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. Because each 100 square feet of roof is one roofing square divide.

How to calculate square feet of a roof step 1. Measure the ground dimensions of the house using a tape measure and write down these dimensions. This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. To find the squares divide the overall roof area by 100 and then round up.

Include dormers the small outjuttings over attic. You will need to express this size in terms of square feet. 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. A square simply refers to a 10 x 10 square of roofing.

Multiply the length by the width to arrive at. For instance if the roof is 1550 square feet then it is 16 squares. Multiply the length and width of each square or rectangle shaped plane. How to estimate roofing materials.