Formula For Roofing Area

1 roof square 100 square feet.

Formula for roofing area.

Next square your result. 1 9 1. The answer to this is the total number of squares on your roof for which you need to purchase shingles. Calculating the area true once you have your roof s pitch divide the number by 12.

In the construction industry roofs are measured in squares one square equals 100 square feet. Divide the area you calculated in step 4 by 100. If your number is 1 3 squared would yield 1 9 after that add 1 to your number. The length l times the height h of a triangle is twice its area a2.

Dividing by 12 gives the ratio of inches in rise per distance. So if you divide your answer of a product of length times height by two you will get the area of a triangle. For example if your roof s pitch is 4 in 12 you would divide 4 by 12.