You can attach tile to tile by preparing the old surface and using a thin-set mortar specifically designed for this purpose.
Here's a breakdown of the process:
Preparing the Existing Tile Surface
Proper preparation is critical for ensuring the new tile adheres correctly.
- Cleaning: Thoroughly clean the existing tile surface. Remove all dirt, grease, grime, and any loose debris. Use a strong cleaner or degreaser for this step. Rinse well and let it dry completely.
- Sanding: Sand the surface of the existing tile. This is the most crucial step. You want to create a rough surface that the new mortar can grip. Use a medium-grit sandpaper or a diamond sanding pad. The goal is to remove the glossy finish.
- Vacuuming: After sanding, vacuum the surface to remove all sanding dust. Wipe down with a damp cloth to ensure no residue remains.
Applying the Thin-Set Mortar
Choosing the right mortar is essential for a successful tile-on-tile installation.
- Choose the Right Mortar: Use a high-quality, polymer-modified thin-set mortar specifically designed for adhering to non-porous surfaces like existing tile. Read the manufacturer's instructions carefully.
- Mix the Mortar: Mix the thin-set mortar according to the manufacturer's directions. Use clean water and avoid adding too much liquid, which can weaken the adhesive properties.
- Apply a Thin Coat: Using a notched trowel, apply a thin, even coat of the thin-set mortar to the sanded existing tile surface. Ensure you fill in the grout lines of the old tile to create a level base.
- Comb the Mortar: Comb the mortar with the notched trowel at a 45-degree angle. This creates ridges that help the new tile adhere.
Installing the New Tile
Careful installation will ensure a lasting finish.
- Place the Tiles: Carefully place the new tiles onto the mortar bed, pressing firmly to ensure good contact. Use tile spacers to maintain consistent grout lines.
- Adjust as Needed: Make any necessary adjustments to the tile placement while the mortar is still wet.
- Allow to Cure: Allow the mortar to cure completely according to the manufacturer's instructions (usually 24-72 hours). Avoid walking on the tiles during this time.
Grouting
Completing the job properly.
- Remove Spacers: Remove tile spacers after the mortar has cured.
- Apply Grout: Apply grout according to the manufacturer's instructions, filling the grout lines completely.
- Clean Excess Grout: Clean off any excess grout from the tile surfaces with a damp sponge.
- Allow Grout to Cure: Allow the grout to cure completely before using the tiled surface.
