The roofing industry's unit of measurement — one square equals 100 square feet of roof surface.
A unit of measure equal to 100 square feet of roof surface area, used to quantify roofing materials and labor. Roofing material quantities (shingles, felt, membrane) are calculated and sold by the square. A 2,000 square foot house with a simple gable roof typically has about 22 squares of actual roof surface due to the slope.
The bid included 45 squares of architectural shingles including 10% waste allowance for cuts and a 6:12 pitch factor.
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