Which Side Of Cement Board Do You Tile On

Which Side Of Cement Board Do You Tile On: Unraveling the Mystery

Cement board is an increasingly popular substrate for tiling due to its durability, moisture resistance, and ease of installation. However, when it comes to tiling, the question of which side of the cement board should face up often arises. This guide will delve into the distinctions between the two sides of cement board and provide clear guidance on which side is appropriate for tiling.

Understanding the Anatomy of Cement Board

Cement board typically comprises a blend of Portland cement, sand, and cellulose fibers. It is produced in rectangular sheets with two distinct sides:

Smooth Side: This side features a smooth, flat surface designed to accept the tile adhesive and tiles.
Textured Side: The reverse side of the cement board often exhibits a rough or textured finish.

Which Side to Choose for Tiling

The smooth side of the cement board is the designated surface for tiling. Its smooth texture promotes optimal adhesion between the tile adhesive and the cement board.

The textured side serves a different purpose. The rough surface enhances the mechanical bond between the cement board and the underlying substrate, such as plywood or concrete. It is crucial to note that the textured side should never be exposed to the tile adhesive or tiles. Doing so can compromise the adhesion and lead to premature tile failure.

Reasoning Behind the Smooth Side for Tiling

Adhesion: The smooth surface of the cement board provides a more uniform surface for the tile adhesive to adhere to.
Consistency: The flat surface ensures that all tiles are installed at an equal level, minimizing the risk of uneven or tilted tiles.
Efficiency: Applying tile adhesive to a smooth surface is easier and requires less material, saving both time and resources.

Additional Considerations

Clean the Surface: Prior to tiling, thoroughly clean the smooth side of the cement board to remove any dust, debris, or contaminants.
Use the Correct Adhesive: Select a tile adhesive specially formulated for use with cement board to ensure proper adhesion.
Proper Installation: Follow the manufacturer's guidelines for installing the cement board and tiles to guarantee a long-lasting and durable installation.

Conclusion

When tiling on cement board, the smooth side is the designated surface for receiving the tile adhesive and tiles. The textured side provides mechanical bonding to the underlying substrate. Understanding this distinction is essential for a successful and long-lasting tile installation.