Red Seal Floorcovering Installer Practice Exam

When preparing wood subfloors for tile installation, the application of a cement backer board is essential. Wood subfloors can undergo expansion and contraction due to moisture fluctuations, which can lead to tile cracking or detachment over time. By installing a cement backer board, you create a stable and rigid surface that minimizes movement and provides a strong bond for the tile adhesive.

The cement backer board acts as a moisture barrier and adds weight and stability, which is particularly important for tile installations. It also helps to prevent any potential issues caused by the wood subfloor shifting, ensuring that the finished tile surface remains intact over its lifespan. This step is crucial for achieving a durable and long-lasting tile floor. Other options, such as applying sealants or sanding, may not provide the necessary support and stability for tile installation, nor do they address the movement problem associated with wood floors. Replacing the wood entirely can be costly and unnecessary if the backer board provides the needed support and structurally sound surface for the tile.