How to Replace Old Tile Grout

Grout between ceramic tiles can become cracked, discolored and chipped. Cracks allow water to get behind the tile, causing more expensive problems. Replacing old tile grout will have your tile look fresh again. To learn how to replace old tile grout, follow these steps.

Difficulty: Moderately Easy

Instructions

1. Tape off a small area to begin working. Use painter's tape on the ceramic tile so it doesn't get scratched.

2. Work on a small area at a time so nothing is passed over. Use a grout saw to remove the grout. Grout saws are inexpensive and available at most hardware stores. Run the saw along the grout line.

3. Brush or vacuum out any flakes or residue after removing the grout. Use a cleaner and a wet rag to further remove any residue left in the grout lines.

4. Mix the new grout according to the manufacturer's instructions. Don't use too much water because this causes the grout to crack later.

5. Apply the grout to the grout lines using a float working from the bottom up on a wall or from the back to the front on a countertop. Allow the grout to dry for five minutes.

6. Wipe the ceramic tiles with a wet sponge to remove excess grout. Use a dry rag to wipe the tiles only. The new grout is set in 20 minutes.

7. Add a thin coat of grout after the first application has dried. This coat fills in tiny holes and leaves a smooth finish. After this has dried, clean the grout with a citrus-based cleaner before adding the sealer. Follow the directions on the sealer closely before applying. If done properly, the grout won't become discolored again.