Formula For Square Footage Of Roof

So keeping with our roof pitch of 4 this gives us 1 9.

Formula for square footage of roof.

Square the result of step 1. 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. 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.

1 roof square 100 square feet. The length l times the height h of a triangle is twice its area a2. How to calculate square feet of a roof. Add 1 then take the square root.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length. Multiply this number by your most recent result to get the estimated square footage of your roof. 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. Multiply the length and width of each square or rectangle shaped plane. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. 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.

Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about. The only difference in this calculation to the one for a gable roof area is the amount of the ridge. Calculate each plane separately. The calculator cannot account for complex shapes based on a measurement of square footage alone.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.