How To Estimate Roofing Squares

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

How to estimate roofing squares.

Convert the area to roofing squares. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. It is often compared to slope but is not exactly the same. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

A square simply refers to a 10 x 10 square of roofing. 1 roof square 100 square feet. This is simply 100 square feet of roof. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.

Outside of the u s a degree angle is typically used. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. 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. The answer is the number of roofing squares for the roof.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. How to estimate roofing materials. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

The length l times the height h of a triangle is twice its area a2. To find the squares divide the overall roof area by 100 and then round up. Then add 10 to the number to account for waste.