Re-grouting tile involves removing old, damaged grout and replacing it with fresh grout to improve the appearance and integrity of your tiled surface. Here's a step-by-step guide:
1. Gather Your Supplies
Before you start, gather the following tools and materials:
- Grout removal tool (grout saw, oscillating tool with grout removal attachment, or utility knife)
- Vacuum cleaner with hose attachment
- Small brush or toothbrush
- Mixing bucket
- Grout sponge
- Clean water
- New grout (choose sanded grout for wider grout lines, unsanded for narrow ones)
- Grout float
- Safety glasses
- Gloves
- Optional: Grout sealer
2. Remove the Old Grout
This is the most time-consuming part. Take your time to avoid damaging the tiles.
- Protect yourself: Wear safety glasses and gloves.
- Use a grout removal tool: Carefully run the tool along the grout lines to grind away the old grout. Apply even pressure and avoid scratching the tiles. An oscillating tool with a grout removal attachment is often the most efficient option. For narrow grout lines, a utility knife can be used but requires extra caution.
- Vacuum frequently: As you remove the grout, vacuum up the debris to keep the area clean and improve visibility.
3. Clean the Grout Lines Thoroughly
- Vacuum again: Use the vacuum hose attachment to thoroughly clean all grout lines, removing any remaining debris.
- Brush: Use a small brush or toothbrush to scrub the grout lines and loosen any stubborn pieces of grout.
- Final Vacuum: Do a final vacuuming to ensure the lines are clean and free of dust.
4. Mix the New Grout
- Follow the manufacturer's instructions: Add water to the dry grout mix according to the instructions on the packaging. Use a mixing bucket and stir the mixture thoroughly until it reaches a smooth, creamy consistency similar to peanut butter.
- Avoid overwatering: Adding too much water will weaken the grout.
- Let it slake (if required): Some grouts require a slaking period, where you let the mixture sit for a specified time after mixing before using it. Check the instructions.
5. Apply the New Grout
- Use a grout float: Scoop up some grout with the grout float and spread it diagonally across the tile surface, forcing it into the grout lines.
- Work in sections: Apply the grout to a manageable area (e.g., 2-3 square feet) at a time.
- Ensure complete filling: Make sure the grout lines are completely filled and compacted. Pass over each line several times at different angles.
6. Remove Excess Grout
- Angle the float: Hold the grout float at a 45-degree angle and scrape it across the tile surface to remove excess grout.
- Wipe diagonally: Wipe diagonally across the tile to avoid pulling grout out of the lines.
7. Sponge the Tile Clean
- Wait for initial set: Allow the grout to set for the time specified in the manufacturer’s instructions (typically 15-30 minutes). The grout should be firm but still slightly pliable.
- Use a damp grout sponge: Dip a grout sponge into clean water and wring it out thoroughly. You want the sponge damp, not soaking wet.
- Wipe diagonally: Gently wipe the tile surface diagonally across the grout lines to remove excess grout residue. Rinse and wring out the sponge frequently.
- Multiple passes: You'll likely need to wipe the surface several times, using a clean section of the sponge each time, to remove all the grout haze.
8. Final Cleaning and Curing
- Haze removal: After the grout has dried for a few hours, a haze may appear on the tile surface. Remove this haze with a clean, dry cloth or a grout haze remover according to the product instructions.
- Curing: Allow the grout to cure completely, as per the manufacturer’s instructions (typically 24-72 hours), before exposing it to water.
- Sealing (Optional): Consider applying a grout sealer to protect the grout from stains and moisture. Apply the sealer according to the manufacturer’s instructions.
