How to Repair Tile Grout
Quick Answer
Remove old grout with a grout saw, apply new grout with a rubber float, and wipe off excess with a damp sponge.
How to troubleshoot Tile Grout
Cracked or missing grout can allow water damage. This guide covers removing old grout and applying new grout for a fresh, watertight seal.
Step-by-Step Fix
- Remove any loose or cracked grout using a grout saw or rotary tool.
- Vacuum the joint lines to remove dust and debris.
- Mix the grout according to the manufacturer's instructions to a peanut-butter consistency.
- Apply the grout to the joints using a rubber float, holding it at a 45-degree angle.
- Scrape away excess grout with the float, then let it set for 10-15 minutes.
- Wipe the tiles with a damp sponge in a circular motion to clean off excess grout.
- Allow the grout to cure for 24-48 hours before exposing it to water.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Grout cracks after drying | Mixed too thin or flex in the subfloor | Remove cracked grout and reapply with proper mixing ratio. |
| Hazy film on tiles | Grout residue | Use a grout haze remover or vinegar solution to clean. |
Frequently Asked Questions
Can I use coloured grout to match my tiles?
Yes, choose a grout colour that complements or contrasts with your tiles.
How long does grout take to dry?
It cures in 24-48 hours, but avoid heavy water exposure for up to 72 hours.