Red Seal Lather (Interior Systems Mechanic) Practice Exam

How should drywall be positioned when being installed?

1. The long edge should be vertical

2. The short edge should be vertical

3. The long edge should be horizontal and staggered

4. The short edge should be staggered

The correct answer is: The long edge should be horizontal and staggered

When installing drywall, positioning the long edge horizontally and staggering the seams is essential for creating a strong and uniform wall surface. Installing the drywall with the long edge horizontal helps reduce the number of seams on a wall, leading to a smoother finish once taped and mudded. Staggering the joints between sheets adds strength and stability by preventing long, continuous seams, which are more vulnerable to cracking. This method ensures that the weight of the drywall is more evenly distributed and enhances the overall structural integrity of the wall assembly. It's also worth noting that this installation technique allows easier access to tape the joints and provides better sound and fire resistance. Overall, installing the drywall sheets in this manner is standard practice in building and finishing walls, contributing to a more durable and aesthetically pleasing result.