Red Seal Tilesetter Practice Exam

Which of the following is an important step before grouting tiles?

1. Applying a wax finish

2. Filling any empty spaces with additional adhesive

3. Checking for any loose tiles

4. Installing a moisture barrier

The correct answer is: Checking for any loose tiles

Before grouting tiles, checking for any loose tiles is a crucial step. Ensuring that all tiles are securely bonded to the substrate is essential because loose tiles can compromise the integrity of the installation. If grout is applied over loose tiles, it can lead to cracking or chipping over time as the tiles shift or become dislodged. Additionally, loose tiles might not allow proper adhesion of the grout, leading to further complications like water infiltration and mold growth beneath the tiles. The other options, while involved in the tiling process, do not directly relate to the immediacy of preparing the tile surface for grouting. Applying a wax finish or installing a moisture barrier is generally done after the grouting process, and filling empty spaces with additional adhesive could lead to uneven surfaces that complicate grouting. Thus, verifying that all tiles are properly set before moving on to grouting is a vital aspect of a successful tiling project.