What type of tile is considered unglazed impervious mosaic tile?

Unglazed impervious mosaic tile is a specific type of tile characterized by its non-porous surface and lack of a glaze finish, making it particularly suitable for use in environments where water resistance and durability are essential. Such tiles are often used in settings like swimming pools, spas, and other wet areas because they do not absorb moisture and are resistant to staining and wear.

In this context, the correct answer identifies a specific classification or type within the standards set for tile. Unglazed impervious mosaic tiles are typically smaller than standard tiles, measuring less than 6 square inches, and are manufactured from various compositions, including stone, porcelain, or ceramic materials, ensuring they meet the required performance criteria.

Understanding these characteristics is crucial for selecting the appropriate type of tile for specific applications, particularly when considering factors like slip resistance, ease of maintenance, and overall longevity in high moisture environments. Recognizing this type aligns with ANSI (American National Standards Institute) guidelines and helps ensure compliance with industry standards for tile installation and performance.