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Old 03-16-2010, 01:16 PM   #1
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Loose Travertive Tile


I have a marble-set travertine tile floor installed over a 14 year old slab on grade. All slab cracks were covered with a rubber membrane. The mud base is 1" minimum and we used a white premium thin set on each tile for bonding and to prevent the dark gray mud color from leaching through the medium color tiles. Installation was completed using non-sanded grout and sealed 4 months ago.

The problem I am experiencing is that within the past 2-3 weeks I noticed a few tiles out of 1200 sq. ft. have a hollow sound apparently indicating the bond has separated. The tiles are not cracked (yet) though I do have some deterioration of the 1/16" wide grout lines adjacent to these particular tiles.

The tiles are 3/4" thick x 16" x 24" with the exception of one tile that is 75% hollow sounding for the most part it is only 3-4 inches along the corners that have this indicator.

My question is-
Is there a bonding agent product thin enough that I could pour it into the grout lines with the intention of it spreading out under the tiles, thus filling the void and recreating the bond?

Your comments & thoughts are welcomed.

Thank you!

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Old 03-27-2010, 10:11 PM   #2
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Loose Travertive Tile


Update.

No further deterioration since original post.

Still looking for a solution

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Old 03-28-2010, 12:37 AM   #3
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Loose Travertive Tile


Is the tile cracked? or moving? Grout still solid?
You age the slab, but how old is the tile job?
You may need to replace that one tile. Got any extras around?
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Old 03-28-2010, 09:40 AM   #4
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Is the tile cracked? No
or moving? No
Grout still solid? minimal deterioration on the worst tile.
You age the slab, but how old is the tile job? 4 months
You may need to replace that one tile. Got any extras around? Yes

I'm just trying to avoid replacement. Going forward if I were to go the replacement route I could use up the attic stock which was intended for future cracked tiles.

Thanks for the reply.
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Old 03-28-2010, 10:52 AM   #5
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Loose Travertive Tile


sounds like that one tile didn't get enough thinset under it and the result is that it sounds hollow when you step on it.
personally, I wouldn't worry about it until the grout gives in and collapses or the tile loosens.
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Old 03-28-2010, 04:39 PM   #6
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Loose Travertive Tile


More than likely there is not proper coverage of thinset underneath the tile. You can try to use a product like "rebond" It can be injected underneath the tile to fill in the hollow spots. You can go to a farm type supply store and buy horse medical syringes to inject it underneath.

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