What type of grout should be used in a shower installation?

The most suitable grout for a shower installation is epoxy grout due to its low porosity and water resistance properties. In environments that are frequently exposed to moisture, such as showers, it's essential to use a grout that prevents water from penetrating through the joints. Epoxy grout creates a strong, impermeable bond that helps to prevent mold and mildew growth, which can be a common issue in wet areas.

Epoxy grout is also very durable and resistant to staining, making it a practical choice for areas that undergo regular cleaning and exposure to soap, shampoo, and other products typically found in a shower. Additionally, its chemical resistance adds to its longevity, ensuring that the installation remains aesthetically pleasing and functional over time.

In contrast, while regular sanded grout is available, it is more porous and might not provide the level of water resistance needed in a shower. Unsanded grout offers a smoother finish and is generally used for tile joints that are less than 1/8 inch wide, but it is not as water-resistant as epoxy. Latex-based grout, while flexible, does not offer the same level of impermeability and durability as epoxy grout, making it a less suitable option for a shower application where consistent exposure to water occurs.