Formula For Square Footage Of A Roof

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.

Formula for square footage of a roof.

Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about 1 0541. 1 roof square 100 square feet. Multiply by the square. L h 2 area calculating an area of a triangle when estimating a roof.

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. Include dormers the small outjuttings over attic windows. Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3. Multiply the number of roofing squares for a low pitch roof by 1 06 to 1 08 to get the square roof area.

Measure the length and width of every roof plane or surface. Once you have your roof s pitch divide the number by 12. 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. 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. How to calculate square feet of a roof. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. The calculator cannot account for complex shapes based on a measurement of square footage alone.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. The length l times the height h of a triangle is twice its area a2.