An EIFS elevation is 74 ft wide and 22 ft high. Deduct six windows, each 4 ft by 5 ft. With no waste added yet, what net EIFS area is closest?
Correct Answer
C) 1,508 sf
Gross wall area is 74 x 22 = 1,628 sf. Window deductions are 6 x 4 x 5 = 120 sf. Net EIFS area is 1,628 - 120 = 1,508 sf. Other choices ignore openings, deduct only four windows, or deduct too much.
Why This Is the Correct Answer
Gross wall area is 74 x 22 = 1,628 sf. Window deductions are 6 x 4 x 5 = 120 sf. Net EIFS area is 1,628 - 120 = 1,508 sf. Other choices ignore openings, deduct only four windows, or deduct too much.
Why the Other Options Are Wrong
Option A: 1,628 sf
eifs area, choice a: 1,628 sf is an intermediate from the steps (Gross wall area is 74 x 22 = 1628 sf.); the calculation continues to 1,508 sf.
Option B: 1,488 sf
eifs area, choice c: 1,488 sf omits a required add-on/subtraction; the numeric gap is 20.
Option D: 1,388 sf
eifs area, choice d: 1,388 sf is off by 120 from the checked result 1,508 sf because it misuses the 120 item (6 x 4 x 5 = 120 sf).
Memory Technique
Keep a index tab beside EIFS area: if one number is skipped, the option drifts away from 1,508 sf.
Reference Hint
Open ANSI/EIMA 99-A-2017, Exterior Insulation and Finish Systems; use the index entry or section for "EIFS wall area takeoff with openings" to confirm that Gross wall area is 74 x 22 = 1,628 sf.
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