Red Seal Tilesetter Practice Exam

What is the minimum overlap recommended for tiles around corners?

1. 1/8 inch

2. 1/4 inch

3. 1/2 inch

4. 3/4 inch

The correct answer is: 1/4 inch

The recommended minimum overlap for tiles around corners being 1/4 inch is crucial to ensure proper adhesion and minimize the risk of water infiltration or cracking. Overlapping tiles creates a more effective mechanical bond, which is particularly important in areas that endure movement or stress, such as corners. A 1/4 inch overlap allows for sufficient coverage while also accommodating minor inconsistencies in tile sizing or installation. This overlap can also help to direct water away from seams, enhancing the durability and longevity of the tiled surface. In contrast, smaller overlaps may not provide the same level of protection against water ingress or structural movement, while excessive overlaps could require more cutting and adjustment, complicating the installation process. Understanding the significance of this 1/4 inch overlap helps tilesetters create a more resilient installation, particularly in areas prone to moisture exposure, thus ensuring the overall integrity of the tile work.