Can You Tile Over Tile?

Tiling over existing tiles can be a practical and time-saving solution for refreshing your space without the hassle of removing the old tiles. However, it’s essential to understand when this method is suitable and the steps required to achieve a durable and professional finish.

When Is It Possible to Tile Over Tile?
Tiling over existing tiles is possible if the current tiles meet specific conditions:

• Secure Installation: The existing tiles must be firmly attached, with no loose or damaged tiles.
• Level Surface: The tiled surface should be even and free of irregularities that could affect the new tiles’ alignment.
• Proper Adhesion: The old tiles must be cleaned and prepped to ensure proper adhesion for the new tiles.
• Appropriate Weight Support: The substrate underneath the tiles must be able to support the additional weight of a second layer of tiles.

When Is It Not Recommended?
Tiling over tile is not advisable in the following cases:

• The current tiles are cracked, loose, or poorly installed.
• The existing tiles are uneven or have significant variations in height.
• The additional layer of tiles would interfere with fixtures, doors, or appliances.
• The surface is excessively porous, making adhesion difficult.

Steps to Tile Over Tile

Step 1: Inspect the Existing Tiles
Check for loose, cracked, or damaged tiles. Repair or remove any problematic tiles before proceeding.

Step 2: Clean the Surface
Thoroughly clean the old tiles to remove grease, dirt, and grime. A mixture of warm water and a degreasing cleaner works well. Rinse and allow the surface to dry completely.

Step 3: Roughen the Surface
For proper adhesion, the surface of the old tiles must be roughened. Use sandpaper or an electric sander to lightly scuff the surface, creating a better bond for the adhesive.

Step 4: Apply a Bonding Primer (If Needed)
Depending on the tile type and adhesive used, you may need to apply a bonding primer to the surface of the old tiles. This ensures a secure bond between the old and new layers.

Step 5: Choose the Right Adhesive
Use a high-quality adhesive specifically designed for tiling over tile. This ensures proper bonding and longevity.

Step 6: Install the New Tiles
Begin tiling as you would on a regular surface. Use a notched trowel to spread the adhesive evenly, and press each tile firmly into place. Maintain consistent spacing with tile spacers.

Step 7: Grout and Finish
Once the adhesive has cured, apply grout to fill the spaces between the tiles. Wipe away excess grout with a damp sponge and allow it to dry completely.

Pros of Tiling Over Tile

• Saves time and labour compared to removing old tiles.
• Reduces mess and dust during renovation.
• Provides a fresh look without tearing out the existing surface.

Cons of Tiling Over Tile

• Increases the thickness of the surface, which can affect door clearance and fixtures.
• Requires a stable and well-prepared base to ensure durability.
• May not be suitable for heavily damaged or uneven surfaces.

Tiling over tile can be an effective solution for many projects, provided the existing tiles are in good condition and properly prepared. By following the correct steps and using high-quality materials, you can achieve a professional finish that lasts for years.