Formula For Roofing Area

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Formula for roofing area.

1 9 1. Divide your roof pitch by 12. The length l times the height h of a triangle is twice its area a2. In the construction industry roofs are measured in squares one square equals 100 square feet.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Dividing by 12 gives the ratio of inches in rise per distance. The answer to this is the total number of squares on your roof for which you need to purchase shingles. Roof pitch is given as the number of inches in height change over the distance of one foot.

Calculating an area of a triangle when estimating a roof. Calculating the area true once you have your roof s pitch divide the number by 12. 1 roof square 100 square feet.