Formula For Square Footage Of Roof

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

Formula for square footage of roof. Square the result of step 1. 1 roof square 100 square feet. Multiply this number by your most recent result to get the estimated square footage of your roof. The only difference in this calculation to the one for a gable roof area is the amount of the ridge.

Calculate each plane separately. Include dormers the small outjuttings over attic windows. The length l times the height h of a triangle is twice its area a2. Measure the length and width of every roof plane or surface.

Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length. Multiply the length and width of each square or rectangle shaped plane.

So keeping with our roof pitch of 4 this gives us 1 9. 1 300 x 1 05 1 365 square feet calculating the area true if you want to get the exact area measurement for your roof you can follow these steps. The calculator cannot account for complex shapes based on a measurement of square footage alone. 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.

Add 1 then take the square root. Once you have your roof s pitch divide the number by 12. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. How to calculate square feet of a roof.

Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about.