1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Figure square foot of my 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.
The answer is the number of roofing squares for the roof.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
Roofing materials are typically packaged in squares each of which is the equivalent of 100 square feet 9 3 m 2 of roof space.
It will also show the perimeter of the shape.
Enter square footage calculate or enter the square footage of the attic or area to be vented.
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.
The total amount of roofing material you need is 17 300 1 730 19 030 square feet.
Keep in mind that using google earth isn t going to give you a 100 percent accurate reading but it will give you a basic idea of the size of the roof for your calculations for the roofing materials.
To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares.
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.
Just use it as a starting point and you ll have a fairly basic idea of what you re dealing.
Dividing the total area of your roof by 100 will therefore help you figure out how many squares worth of shingles to order.
Multiply the square footage of your roof by 1 to get the 10 percent waste allowance.
Divide your square footage by 100 to estimate your materials.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
As you add points the area will be updated below and converted into acres square feet meter kilometers and miles.
Flat roofs 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 calculator cannot account for complex shapes based on a measurement of square footage alone.
Don t use this as your only method of measuring.
