Square Feet Formula For Roofing

The only difference in this calculation to the one for a gable roof area is the amount of the ridge.

Square feet formula for roofing.

Roof pitches in. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length. This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. The answer is the number of roofing squares for the roof.

For example if you are buying carpet for a room that is 12 feet long and 10 feet wide. Multiply the square footage of your roof by 1 to get the 10 percent waste allowance. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.

The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. Calculate or enter the square footage of the attic or area to be vented. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. Convert the area to roofing squares.

The calculator cannot account for complex shapes based on a measurement of square footage alone. In this overhead view you see both a hip end section and gable ends. To find the squares divide the overall roof area by 100 and then round up. With a more complex roof such is this one it is highly recommended that you make a basic sketch.

Measure your house at ground level then add in the roof s overhang for greater accuracy. L 30 feet h 12 feet 30 12 2 180 square feet. To find square feet multiply the length measurement in feet by the width measurement in feet. Build your roof empowers you to select each layer and component that goes into your total protection roofing system so that you get the roof you want to protect your home.

Now that the basic concept has been covered let s take a look at a more complex roofing system. The total amount of roofing material you need is 17 300 1 730 19 030 square feet. Roofing contractors estimate projects and materials by the square so it is crucial to find this measurement to accurately estimate the amount of material needed. To conclude the example if your total roofing area is 17 300 square feet your waste allowance would be 17 300 x 1 1 730 square feet.

A square simply refers to a 10 x 10 square of roofing.