What aspect of tile installation does "coverage" refer to?

"Coverage" in tile installation specifically refers to the level of bonding achieved between the tile and the substrate. This concept is crucial because it directly impacts the durability and longevity of the installation. Proper coverage ensures that the adhesive effectively holds the tiles in place, minimizing the risk of tiles loosening or cracking over time.

When a sufficient amount of adhesive covers the back of the tile and is adequately applied to the substrate, it results in a strong bond that can withstand various stresses, such as foot traffic, environmental changes, and potential impacts. Ensuring optimal coverage also helps to prevent moisture from seeping underneath the tiles, which can lead to mold growth and damage.

In contrast, the other options focus on different aspects of the installation process. The amount of adhesive used, for example, is important, but without the context of effective bonding, it doesn't fully encapsulate what coverage is. Similarly, total square footage relates to the area being tiled, while alignment pertains to the visual aspect of the installation. However, these factors do not address the critical nature of how tiles adhere to the surface, which is the essence of coverage.