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Unread 01-06-2019, 06:38 PM   #1
nesc39
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Miracle tiles!

Stuck these 2 colors of tile. Same exact brand that was bought at the same time and installed with the same mortar. The tiles have a white opaque backing on them to prevent seeing through to the mortar..... It’s been 2 days and I can see the mortar through the dark tiles and cannot figure out why. I just went and pulled off the tiles and they all still have the backing on them. Here are some pictures of the tiles on the wall and here is the exact same tile showing the front and the back
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Last edited by nesc39; 01-07-2019 at 08:40 AM.
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Unread 01-06-2019, 07:05 PM   #2
Carbidetooth
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Many coatings on glass tile are opaque. Try sticking a damp sponge on the back of a new tile and see if the moisture is apparent from the front.

Manufacturers often are specific when it comes to mortar, which I'm assuming is what you're calling "cement". Most that I've used are almost super white and heavily modified. What did you use to bond them?
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Unread 01-06-2019, 07:51 PM   #3
Radas
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I second the white tacky mortar for glass. I've had pretty good luck with mapei's 10lb glass tile mortar.

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Unread 01-06-2019, 08:38 PM   #4
nesc39
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White TEC full flex. Use it all the time and never had this happen
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Unread 01-06-2019, 09:22 PM   #5
workhurts
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Any chance the lighter glass is also frosted? That could block the discoloration. Wonder if the darker glass would even out once everything is dry and cured.
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Unread 01-07-2019, 11:57 AM   #6
nesc39
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No they are both clear glass. I made a mock-up test tile yestersay and that one looks fine, it’s so confusing
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Unread 01-08-2019, 02:46 PM   #7
Lou_MA
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You burned the backs of the tiles, plus notched and flattened the thinset to get 100% coverage?
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Unread 01-12-2019, 07:45 PM   #8
nesc39
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So the mock up with 1/2 of the tile spray painted turned out these results. Apparently the mortar is eating through whatever coating the company used. Also it only happens on the darker tile’s. Now ripping them all off and replacing them but Home Depot told the customer to beat it and they won’t pay labor to replace them
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Unread 01-13-2019, 06:03 AM   #9
BelkTile
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That is so odd that it is eating the back of the tile coating.....
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