Which type of tile is generally impervious to water?

The type of tile that is generally impervious to water is unglazed porcelain tile. Unglazed porcelain has a very low water absorption rate, typically below 0.5%, making it highly resistant to water penetration. This characteristic allows it to perform well in wet environments, such as bathrooms and kitchens, where moisture is prevalent. The dense body of unglazed porcelain contributes to its durability and suitability for both indoor and outdoor applications.

In contrast, glazed ceramic tile can be more resistant to water due to its glazed surface, but it is not necessarily impervious, as the clay body beneath the glaze can absorb moisture. Natural stone tiles may vary significantly in porosity; many types require sealing to prevent water absorption. Similarly, concrete tile is porous and may also need sealing to enhance its water resistance. Understanding these properties is crucial for selecting the appropriate tile for specific applications, especially in moisture-prone areas.