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Unread 05-28-2013, 01:28 PM   #1
cmarft
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Blotchy natural stone tile after install!

About a week ago, I had natural stone installed on my fireplace. I believe the stone is slate. After the installer installed and grouted, the result was ugly and blotchy (see photo). The stones were uniform out of the box. Could this be the wrong choice of adhesive? thanks!
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Unread 05-28-2013, 02:35 PM   #2
JTile
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Kind of tough to give any gueses without some more information. You think its slate... any way to confirm that? What type of adheisive was used? What was the stone set over? What kind of grout was used?

Have you talked to your installer about this?
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Unread 05-28-2013, 07:57 PM   #3
LGB
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It's moisture from the thinset. Give it some time, it will go away.
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Unread 05-28-2013, 08:06 PM   #4
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I agree on the moisture from the thinset. How long between setting and sealing?
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Unread 05-28-2013, 08:09 PM   #5
Screw Loose
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Yeah, that stone is just bleeding the water off of the thinset.
Give it about a week, it should clear up beautifully.
Then seal it.

Worst case scenario is that it is grout haze, or the installer didn't pre-seal the tile before grouting.

But here's to hopin' that it's just the moisture!
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Unread 05-28-2013, 08:18 PM   #6
Davy
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I agree, hopefully it's the moisture from the thinset. But, if mastic was used, it's possible it could do the same thing and would take much longer to dry out. I have seen moisture from thinset take 4 to 5 weeks to dry out. Keep us posted.
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Unread 05-28-2013, 08:21 PM   #7
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Pointing a box fan towards it will help
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Unread 05-29-2013, 08:52 AM   #8
jadnashua
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Most people think of stone as being impervious...but, many of them actually do absorb moisture. If you have a scrap of that stone tile, wet it with a sponge, and you'll probably notice the color change that matches that on the wall now. My granite tile took weeks to return to its 'normal' coloration after setting. If you like the color of it when wet, you can seal it (after it dries out first!) with an enhancing sealer, and that will approximate the 'wet look'. I found that I liked the look of mine 'wet', and did put on an enhancing sealer - the colors are more vibrant, but that may not be what you're looking for and a 'normal' sealer won't change the color much, if at all.
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Unread 05-29-2013, 12:03 PM   #9
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If your tiles are slate you will find that they really respond to enhancing sealers. Our slate fireplace went from dull to brilliant with the glossy treatment we used. Good luck with the drying, if that really is the issue.
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Unread 05-29-2013, 12:20 PM   #10
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Slate fireplace

glossy look
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Unread 05-30-2013, 09:03 AM   #11
ss3964spd
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Looks like the same slate I used on my fireplace, Jim, looks great.
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