How to remove grout

bibbusJuly 1, 2013

My bathroom is about 10 years old and the handymen who did it really didn't do a good job. You can see from the picture. About half the grout is stained and part of the stained grout is on top of the tile. I have tried to clean it for years - tried everything but nothing removes the blackish stain. Its from minerals in my water. How can I remove this and regrout? I will only try to remove the floor grout as most of the wall tile and grout looks fine. I checked out some grouting tools - an electric regrouting tool from Hex Corp on Amazon and a drimmel tool. I need something more than elbow grease, LOL! Please help!

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That's a tough one. There are tools to remove the grout in the grout lines, but I don't know about he grout on the surface of the tile. I know that there are some acids that can be used to remove grout haze, but that's a lot more than just haze!
I would ask at the pros over at the John Bridge Tile forum for advice.

    Bookmark   July 3, 2013 at 1:31PM
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I will do that but could you clarify. The tools that are strong enough to remove the grout lines - are they several hundred dollars? Or is there something I could use with my drill? I'm pretty strong but nothing I have puts a dent in the grout. It will take some kind of really good saw. I could even put up with the two or three places that have grout on the surface if I could regrout the rest of the shower floor. Thank you so much for your response. I was afraid I wouldn't get an answer.

    Bookmark   July 3, 2013 at 7:22PM
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Ask at a hardware store or home center for a grout saw. It is something that you use by hand. Or, if you have a dremel type tool there should be a special attachment for that. The problem is that with either method it is very easy to chip the tile. But I think that it would be easier to tear out and replace all the tile.

    Bookmark   July 3, 2013 at 8:31PM
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Babka NorCal 9b

We have several companies here in Silicon Valley that clean or remove and replace, or even change the color of grout. See you have any of those locally, and if you can get a free estimate and go from there. Dremel tools aren't real expensive and you can do just about anything with them, so they are a good thing to have around, like a hammer and chisel are.

I think you should heavily chlorine the whole area and seriously consider replacing all of it. It might just be more work and $$$ to remove and correct the problem, than to just rip it all out and start over.

Good luck.


    Bookmark   July 3, 2013 at 9:13PM
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