A loose floor tile can be easily fixed by injecting adhesive underneath it. Using a grout saw, create small access points in the grout around the tile. Then, apply adhesive and weigh down the tile until it cures. This guide provides a detailed method for re-adhering the tile securely in place without removing it.

Understanding Why Tiles Become Loose

Several factors can contribute to loose floor tiles:

  • Poor Initial Installation: Insufficient mortar, uneven subfloor, or inadequate curing.
  • Subfloor Movement: Shifting, settling, or warping of the subfloor.
  • Moisture: Weakens the adhesive bond, especially in bathrooms and kitchens.
  • Heavy Impact: Can crack the adhesive.

What You’ll Need

  • Safety First: Always wear gloves and eye protection when working with tools and adhesives.
  • Grout Saw or Utility Knife with a Pointed Blade: To create access points.
  • Construction Adhesive (Thin Viscosity): Formulated for tile repair; polyurethane-based adhesives are a good option.
  • Caulk Gun: For precise adhesive application.
  • Small Drill Bit (Optional): For particularly hard grout.
  • Vacuum Cleaner: For cleaning debris.
  • Damp Sponge: For cleaning excess adhesive.
  • Weight: Books, brick, or sandbag to weigh down the tile.
  • Painter’s Tape: To protect surrounding tiles.

Step-by-Step Guide: Re-Adhering the Loose Tile

1. Prepare the Area

  • Clean the Tile and Grout: Remove dirt, debris, and loose grout with a vacuum cleaner.
  • Assess the Tile’s Movement: Gently rock the tile to determine where the adhesive is missing.

2. Create Access Points

  • Remove Grout (Carefully): Use a grout saw or utility knife to remove grout in two or three locations. Aim for opposite corners or sides.
    • Tip: If the grout is hard, drill small pilot holes before using the grout saw.

3. Apply the Adhesive

  • Load the Caulk Gun: Load the construction adhesive.
  • Inject the Adhesive: Insert the nozzle into an access point and inject adhesive under the tile. Avoid overfilling.
    • Tip: Move the nozzle to evenly distribute adhesive. Stop injecting if adhesive seeps out of other access points.

4. Clean and Secure the Tile

  • Clean Excess Adhesive: Wipe away any excess adhesive with a damp sponge.
  • Apply Painter’s Tape: Secure the tile’s edges to prevent shifting.
  • Weigh Down the Tile: Place a heavy object on the tile to ensure contact with the adhesive.

5. Allow the Adhesive to Cure

  • Wait Patiently: Follow the manufacturer’s instructions for curing time (typically 24-48 hours) before removing the weight and tape.

6. Re-Grout (If Necessary)

  • Inspect the Grout Lines: Re-grout the removed areas with fresh grout if needed.

Important Considerations

  • Type of Tile: Best for ceramic, porcelain, and some stone tiles. Not suitable for all tiles.
  • Extent of the Damage: If the tile is severely cracked or the subfloor is damaged, replacement may be necessary.
  • Professional Help: Consult a professional if you’re uncomfortable with the repair.