At the middle-school kitchen line, during the buyout verification pass, the roof plane area for the shingle reroof totals 4840 SF. With 12% waste, how many roofing squares are needed?
Correct Answer
B) 54.2 squares
Roofing squares equal roof square feet with waste divided by 100.
Why This Is the Correct Answer
Roofing squares equal roof square feet with waste divided by 100.
Why the Other Options Are Wrong
Option A: 48.4 squares
48.4 squares is below the supported result for shingle reroof; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 602.3 squares
602.3 squares is above the supported result for shingle reroof; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 62.2 squares
62.2 squares is above the supported result for shingle reroof; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Shingle Reroof cart for Roofing Estimator: roofing first, controlling second, whole units last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Roofing; squares and waste factor; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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