Carpenter Red Seal Exam Prep · Question
A 1800 mm wide picture window is being installed. If the manufacturer's rough opening specifications state to add 6 mm to each side of the window unit for shimming and insulation, what's total rough opening width?
If 6 mm is added to each side, this means 6 mm + 6 mm = 12 mm total clearance. Therefore, 1800 mm (window width) + 12 mm = 1812 mm for the rough opening width.
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Question: A 1800 mm wide picture window is being installed. If the manufacturer's rough opening specifications state to add 6 mm to each side of the window unit for shimming and insulation, what's total rough opening width?
Answer options:
- 1806 mm ✅ 1812 mm
- 1818 mm
- 1800 mm
Correct answer: 1812 mm
Explanation: If 6 mm is added to each side, this means 6 mm + 6 mm = 12 mm total clearance. Therefore, 1800 mm (window width) + 12 mm = 1812 mm for the rough opening width.
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