A built-up roof (BUR) system is being installed on a 10,000 square foot warehouse. The specification calls for a 4-ply system with hot asphalt between plies. Approximately how many pounds of asphalt will be needed for the inter-ply mopping at 25 lbs per 100 square feet per ply?
Correct Answer
A) 7,500 lbs
A 4-ply system has 3 inter-ply moppings (between plies). Total asphalt = 10,000 sq ft × 3 moppings × 25 lbs per 100 sq ft = 10,000 × 3 × 0.25 = 7,500 lbs. The flood coat and base mopping are typically specified separately.
Why This Is the Correct Answer
A 4-ply system has 3 inter-ply moppings (between plies). Total asphalt = 10,000 sq ft × 3 moppings × 25 lbs per 100 sq ft = 10,000 × 3 × 0.25 = 7,500 lbs. The flood coat and base mopping are typically specified separately.
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