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.
How to find how many square a roof is.
To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.
You will need to express this size in terms of square feet.
Total square footage from example 2 above.
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.
Number of squares for 2 planes.
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 calculator cannot account for complex shapes based on a measurement of square footage alone.
100 280 squares.
A square is an area of roof which measures 100 square feet.
The first step in a free roofing estimate is measuring the roof dimensions.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Now in order to determine how many squares are there on the gable roof for example all you need to do is divide the total square footage by 100.
1 square in roofing 100 square feet.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
Convert the area to roofing squares.
The result is 240 and this means you would need 240 squares of shingles to cover that roof.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.