Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
How to figure roofing estimate.
The first step in a free roofing estimate is measuring the roof dimensions.
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.
To accurately calculate the area of your roof you must first determine its slope or pitch.
Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.
Our calculator will estimate your total roofing cost installed including the cost of materials labor and warranty for any major type of roof including 3 tab asphalt shingles architectural and premium composition shingles pvc tpo epdm rubber built up roofs cedar shakes and shingles clay tiles natural slate and metal roofing.
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You will need to express this size in terms of square feet.
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.