How to Repair Grout That’s Cracking

Don't tear out the tile, just tear out the cracked grout.

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Introduction

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.

Tools Required

  • Blowgun nozzle
  • Dremel tool
  • Extension cord
  • Grout saw
  • Hearing protection
  • Rags
  • Safety glasses
  • Shop vacuum
  • Utility knife

Materials Required

  • Caulk

Project step-by-step (4)

Step 1

Remove the Old Grout

Removing groutFamily Handyman

Step 2

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.

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Step 3

Apply the Caulk

Applying caulkFamily Handyman

Step 4

Let it Dry

  • Let the caulk cure for at least 48 hours before allowing anyone or anything on the floor.