How To Estimate Roofing Squares

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

How to estimate roofing squares.

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. Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. To find the squares divide the overall roof area by 100 and then round up.

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. For instance if the roof is 1550 square feet then it is 16 squares. It is often compared to slope but is not exactly the same. How to estimate roofing materials.

The length l times the height h of a triangle is twice its area a2. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. A square simply refers to a 10 x 10 square of roofing. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.

Then add 10 to the number to account for waste. 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. 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.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof. Convert the area to roofing squares.