Why does grout keep coming out??


Old 09-07-10, 08:26 AM
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Why does grout keep coming out??

I have one place in a tile floor that the grout keeps coming off of at and intersection of 4 tile. Tiles are 12" square tiles and the grout is the same grout that is used on the entire floor. I can regrout it and after a few months the grout breaks and comes back out. Not happening anywhere else in floor. Any ideas as to why and what I could do to keep it from happening? thanks
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Old 09-07-10, 08:44 AM
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The Pros will be around...but my first thought would be that you have a slight amount of flex in the floor at that point?

Do you know what the tile was layed on? How about floor joists (if any)?
Old 09-07-10, 09:31 AM
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I'm with Vic, there's got to be some movement in the sub floor or underlayment..... and grout isn't flexible.
Was the tile installed directly to the subfloor? if cement board was used was it applied over thinset and screwed in place? What's under the tile floor? finished ceiling? or is it open? [like a crawlspace or basement]
Old 09-07-10, 07:23 PM
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No doubt about it, the floor is moving. Let us know how the floor was installed and with which specific products. You'll have to remove the tiles and refasten or see what's causing the movement.


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