Grouting Over Existing Grout in a Tile Floor

By: Danny Lipford

The grout in our tile floor has worn down in some spots and shrunk in others. Can I apply new grout over the existing grout? -Nancy

While it’s possible to apply new grout over existing grout, the results are usually less than satisfactory. Since the layer of new grout would be very thin and vary in thickness, it may not adhere well and the old grout could show through.

Removing grout from a tile floor is not nearly as difficult as it used to be. Inexpensive oscillating and rotary tools are available with grout removal attachments that can make quick and effortless work of removing old grout.

Once you’ve removed the old grout, vacuum up any remaining loose grout and dust before applying new grout to the tile. Use a sponge and clean water to remove any excess grout or grout haze on the tile.

Good luck with your project,


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6 Comments on “Grouting Over Existing Grout in a Tile Floor”

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  • Susan Waters Says:
    September 15th, 2017 at 2:54 pm

    I need to replace the grouting at the Base of my shower. Do I need to remove the silicone that surrounds the shower tray or is it possible to grout up to the silicone seal. Will this be sufficient to prevent water seepage?

  • Anna Says:
    January 20th, 2017 at 5:07 pm

    How much grout do I have to take out of my tile so I can regrout

  • Lisa Says:
    November 30th, 2016 at 12:56 pm

    I had a similar problem of a dog urine smell at the landing of my basement steps. The former owner must of had a dog who went there. Time and time again I would try to use every cleaner I could find. Eventually I would clean it with vinegar. Eventually the smell would come back. So I soaked it with vinegar. Once it dried I painted the wood. When the paint dried I was able to lay tile that matched the adjoining kitchen tile. The smell has never returned. I believe the vinegar then paint did the job

  • Frances Scott Says:
    September 29th, 2014 at 2:35 pm

    I am planning on doing it your self and adding a bathroom to my attic. I need to know if there is a space requirement or adjustment for the floor jousts between the second floor and attic for the plumbing to fit….never added new just worked on existing.

  • Bonnie Thomas Says:
    June 1st, 2014 at 1:48 pm

    How much grout between tiles needs to be removed before re-grouting? All of it; 1/2 of it? Don’t want to have to redo again.

  • Anthony Says:
    September 15th, 2013 at 6:04 am

    We just bought our home, there had been some toilet leak on main floor that damage a bit the subfloor under it, and made the ceiling in unfinished basement smelly. Every time we go to our basement in laundry room where this damage occurred the smell is strong. We know we need to replace that piece of subfloor. But for now can we do anything to neutralize that smell? Can we clean the plywood? What would you recommend? I am working 6 days a week and have 2 small children that for now I don’t have time to fix the problem.
    Thanks Danny

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Grouting Over Existing Grout in a Tile Floor