Carpenter Red Seal Exam Prep · Question
A carpenter is installing drywall on a ceiling that has uneven joists. Which method is most effective to ensure a flat, level ceiling surface before drywall application?
Using shims to level strapping or furring strips is the most effective method to create a flat, consistent plane for drywall installation, ensuring a profession
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Question: A carpenter is installing drywall on a ceiling that has uneven joists. Which method is most effective to ensure a flat, level ceiling surface before drywall application?
Answer options: ✅ Use shims to level the strapping or furring strips.
- Screw the drywall directly to the joists and use extra mud to flatten.
- Install thicker drywall to compensate for the unevenness.
- Cut custom-sized drywall sheets to fit the varying depths.
Correct answer: Use shims to level the strapping or furring strips.
Explanation: Using shims to level strapping or furring strips is the most effective method to create a flat, consistent plane for drywall installation, ensuring a professional finish. Screwing directly to uneven joists or using extra mud will not adequately address the underlying unevenness. Thicker drywall or custom-cut sheets do not correct the uneven plane of the framing members.
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