How to replace grout:
1. Scrape out the existing grout with a chisel or small putty knife and a small hammer, or simply a utility knife. Be careful not to tap too hard and chip the surrounding tile.
2 Clean the area with a vacuum to remove excess sand, dust, and debris.
3. Run your hand over the grout. Does is feel smooth or a little rough? If it’s smooth, you will need to buy unsanded grout. If it is a little rough, you will need to buy sanded grout. Take a piece of the grout with you to the hardware store to match the color. You only need to buy a small bag or box of grout for small repair jobs. Buy the smallest one you can find.
4. Mix up the grout according to the directions on the back of the bag or box.
5. Take your float, load it with grout and spread grout over the repair area, making sure to push it down into the gap.
6. Scrape away all excess grout by holding your float on its side or at an angle, making sure the grout is smooth and even, just at or slightly below the tile surface.
7. Let the grout dry (or “set up”). This should take about 2 hours.
8. Remove all excess grout and messiness with a damp sponge. Rinse out the sponge frequently and keep it clean. The water will appear chalky or cloudy until it is clean.
9. After grouting, do not get the surface wet for at least 24 hours.
10. After the grout has set up for I week, it should be completely cured. Now it is time to apply a grout sealer. You can buy this at your local hardware store and should follow the directions that come with the product.
How to replace a broken tile:
1. Scrape out grout with a chisel or small putty knife and a small hammer, or simply a utility knife
2. Break the tile in need of repair into tiny pieces using the small hammer.
3. Remove all the pieces of the broken tile. Use a utility knife or small putty knife to scrape the area clean of all excess debris. There will probably be quite a bit of debris left from under the tile, so scrape well! Vacuum the area to remove small particles.
4. Test fit the new tile in the opening. It should have an equal gap on all sides and must also sit flush to the surrounding surfaces.
5. Apply adhesive to the back of the tile and immediately place it into the area being repaired. Use even force with both hands, slightly twisting the tile until it is level with the surrounding area. You want to make sure that the adhesive does not push up the tile unnecessarily.
6. Use a piece of blue painter’s tapes (a type of masking tape) to the tile to hold it in place for 24 hours.
7. Remove the tape and clean around the replaced tile again to assure no debris, dust, or particles have accumulated in the gaps. Clean if necessary.
8. Grout around the tile, following steps 3—10 in the previous project.