How to Repair Grout That’s Cracking
Don't tear out the tile, just tear out the cracked grout.
Is the grout between your floor tiles cracking or, worse, crumbling away? There are a few probable causes, but before you tear up the tile and start over, try this quick cracked grout fix.
- Blowgun nozzle
- Dremel tool
- Extension cord
- Grout saw
- Hearing protection
- Safety glasses
- Shop vacuum
- Utility knife
Project step-by-step (4)
Remove the Old Grout
- Remove all the loose and cracked grout with a grout saw or Dremel tool and completely vacuum out the gaps.
Match the Caulk
- At most tile specialty shops, you can get or order sanded caulk (most floor grouts are sanded) that will closely match your existing grout color.
- Pro tip: This fix is only practical for interior tile floors and when the gaps between the tiles are 1/4-in. wide or less.
Apply the Caulk
- Apply the caulk.
- Smooth it with a wet finger or plastic spoon.
Let it Dry
- Let the caulk cure for at least 48 hours before allowing anyone or anything on the floor.