Can You Use Tile Backer Board Outside Corners In Shower

Essential Considerations When Using Tile Backer Board Outside Corners in Shower

When embarking on a shower remodeling project, employing the appropriate materials is crucial to ensure longevity and aesthetics. Tile backer board, a staple in shower construction, plays a significant role in providing a stable base for tile installation. However, navigating the use of outside corners with tile backer board demands meticulous attention to detail.

This comprehensive guide will delve into the fundamentals of utilizing tile backer board outside corners in shower applications, exploring essential aspects such as material selection, proper installation techniques, and best practices to achieve a flawless and durable finish.

Choosing the Right Tile Backer Board

Selecting a suitable tile backer board is paramount. Cement backer board, the most widely used option, offers exceptional strength and moisture resistance. It is composed of Portland cement, sand, and fiberglass mesh, providing a secure foundation for tile adhesion.

Alternatively, gypsum backer board, made of gypsum sandwiched between paper faces, is a cost-effective option. While gypsum backer board is not as moisture-resistant as cement backer board, it is suitable for showers that experience limited water exposure.

Proper Installation of Outside Corners

When installing tile backer board outside corners, meticulous execution is essential. Cut two pieces of backer board at a 45-degree angle, ensuring a precise miter joint. Secure the backer board to the studs with galvanized screws, leaving a small gap between the backer board and the wall for expansion.

Apply fiberglass mesh tape over the mitered joint and embed it in thinset mortar. Smooth excess mortar and allow it to dry completely before proceeding with tile installation.

Sealing and Waterproofing

Applying a waterproof membrane over the backer board is imperative to prevent water infiltration and protect the substrate from moisture damage. Liquid-applied membranes, such as acrylic or urethane, provide a continuous waterproof barrier while remaining flexible to accommodate movement.

Roll or brush the waterproof membrane onto the backer board, paying particular attention to corners and edges. Allow the membrane to cure according to the manufacturer's instructions before tiling.

Best Practices for a Durable Installation

To ensure a long-lasting and visually appealing tile installation, adhering to best practices is essential.

Use a notched trowel to apply thinset mortar evenly to the back of the tiles.
Press the tiles firmly into place and use spacers to maintain uniform grout lines.
Grout the tiles using a color-coordinated grout that matches the tile and décor.
Seal the grout to prevent staining and protect it from moisture.

By meticulously following these guidelines, you can rest assured of a shower that combines functionality and aesthetic appeal for years to come.