Dividing the total area of your roof by 100 will therefore help you figure out how many squares worth of shingles to order.
Figure square foot of my roof.
The calculator cannot account for complex shapes based on a measurement of square footage alone.
Enter square footage calculate or enter the square footage of the attic or area to be vented.
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.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
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.
As you add points the area will be updated below and converted into acres square feet meter kilometers and miles.
Just use it as a starting point and you ll have a fairly basic idea of what you re dealing.
It will also show the perimeter of the shape.
Divide your square footage by 100 to estimate your materials.
Don t use this as your only method of measuring.
Convert the area to roofing squares.
Roofing materials are typically packaged in squares each of which is the equivalent of 100 square feet 9 3 m 2 of roof space.
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.
The answer is the number of roofing squares for the roof.
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.
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.
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.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
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.
This tool is useful for finding the approximate acreage or a tract of land the square footage of a roof or any other instance where you need a good estimate of the area of something.
