How To Figure Square Feet Of A Roof

So if you divide your answer of a product of length times height by two you will get the area of a triangle.

How to figure square feet of a roof.

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. Roof pitches in degrees. 1 200 x 1 05 1 260 square feet to allow for hips ridges and waste add 10 of your final number for a gable roof and 17 of your final number for a cottage roof. The first step in a free roofing estimate is measuring the roof dimensions.

Your total number would be either 1 386 or 1 474 square feet need help with this project. Measure the length and width of every roof plane or surface. This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. Next multiply the area by your roof s pitch.

You will need to express this size in terms of square feet. Multiply the length and width of each square or rectangle shaped plane. The calculator cannot account for complex shapes based on a measurement of square footage alone. If the house has an irregular shape measure each part separately figure the separate areas and add them together.

The length l times the height h of a triangle is twice its area a2. Measure your house at ground level then add in the roof s overhang for greater accuracy. 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. How to calculate square feet of a roof step 1.

1 roof square 100 square feet. Because each 100 square feet of roof is one. Include dormers the small outjuttings over attic. Convert the area to roofing squares.