Red Seal Drywall Finisher and Plasterer Practice Exam

Which of the following is a common defect in drywall installation?

1. Cracks in the paint

2. Sagging ceiling

3. Nail pops

4. Uneven texture

The correct answer is: Nail pops

Nail pops are indeed a common defect in drywall installation. They occur when nails used to secure drywall to the framing work their way out of the surface, creating small bumps or protrusions in the finished wall. This defect typically happens due to the movement of the house as it settles or due to changes in temperature and humidity, which can cause the wood framing to expand and contract. When nail pops occur, they can be visible through paint and may require additional repair work, including re-sinking the nails or adding screws, followed by finishing and repainting the area. While cracks in the paint, sagging ceilings, and uneven texture can also arise from various issues in drywall work, they are generally less specific to the drywall installation process itself. Cracks in paint are often associated with surface preparation or environmental conditions affecting the paint after application. Sagging ceilings may indicate issues with the ceiling joists or improper installation rather than the drywall itself. Uneven texture could come from inconsistent application of joint compounds or improper finishing techniques. Each of these can arise from a broader variety of factors, but nail pops are distinctly linked to the fastening and securing process of drywall installation.