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.
How to figure out square feet of a roof.
Calculate project cost based on price per square foot square yard or square meter.
Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.
Your roof is without a doubt one of the most important elements of your home.
Calculate square feet meters yards and acres for flooring carpet or tiling projects.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
How to calculate square footage for rectangular round and bordered areas.
Enter measurements in us or metric units.
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.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
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.
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.
This nominal square footage amount is then multiplied by a factor associated with the roof s pitch.
The first step in a free roofing estimate is measuring the roof dimensions.
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.
The answer is the number of roofing squares for the roof.
The total amount of roofing material you need is 17 300 1 730 19 030 square feet.
Multiply the square footage of your roof by 1 to get the 10 percent waste allowance.
Calculate square footage square meters square yardage and acres for home or construction project.