Which Side Of Cement Board Does Tile Go On

Which Side of Cement Board Does Tile Go On?

When it comes to installing ceramic or porcelain tiles over cement board, choosing the right side of the board is essential for a successful and long-lasting installation. Cement board is a popular underlayment for tile because it is waterproof, durable, and provides a smooth and even surface for tile adhesion.

Identifying the Right Side

Cement board typically has two distinct sides—a smooth side and a rough side. The smooth side is intended to face the tile, while the rough side faces the substrate (e.g., drywall, plywood). The rough side provides a better mechanical bond for the thin-set mortar used to adhere the tile.

To identify the smooth side of cement board, observe the surface texture. The smooth side will be free of any ridges, bumps, or imperfections. Conversely, the rough side will have a textured surface, often with a grid pattern or raised fibers.

Why the Smooth Side Faces Tile

The smooth side of cement board provides a flat and even surface for tile installation. This ensures that the tiles are level and have a consistent thickness. A smooth surface also promotes better adhesion between the tile and the thin-set mortar.

In contrast, the rough side of cement board is not suitable for tile installation because it can create uneven surfaces and impede proper adhesion. The ridges or bumps on the rough side can prevent the tile from adhering evenly, potentially leading to cracks or loose tiles over time.

Additional Tips for Tile Installation

In addition to selecting the correct side of cement board, there are several other important considerations for successful tile installation:

Use a high-quality thin-set mortar specifically designed for cement board.
Spread the thin-set mortar evenly using a notched trowel.
Set the tiles firmly into the mortar and press them down to create a strong bond.
Allow the thin-set mortar to cure completely before grouting.
Use a suitable grout and sealer to enhance the durability and appearance of the tile installation.

Conclusion

Selecting the correct side of cement board is crucial for a proper tile installation. Always ensure that the smooth side of the board faces the tile to achieve a flat, level, and durable surface. By following these guidelines and incorporating the additional tips provided, you can successfully install ceramic or porcelain tiles over cement board.