A slab package requires vapor barrier under 18,900 sf of slab. The estimator carries 8% lap and waste. What square footage should be priced?
Correct Answer
A) 20,412 sf
Apply the lap and waste factor to the measured slab area.
Why This Is the Correct Answer
Apply the lap and waste factor to the measured slab area.
Why the Other Options Are Wrong
Option B: 18,900 sf
18,900 sf is below the supported result for vapor barrier quantity; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 19,908 sf
19,908 sf is below the supported result for vapor barrier quantity; it likely omits allowance, conversion, coverage, or final round-up.
Option D: 22,680 sf
22,680 sf is above the supported result for vapor barrier quantity; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Estimator Checks takeoff: count the condition before counting the package Tie the cue to Vapor Barrier Quantity Estimator.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 11th Edition, 2024 to Estimating and quantity takeoff; membrane lap and waste; confirm the required quantity, authority, timing, or record before selecting the answer.
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