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Old 03-11-2011, 08:11 AM   #1
Jobo
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White Carrara Marble Turning Yellow???

Marble minds of the world please lend me your insight.
I just finished a renovation of my master bathroom using white carrara marble everywhere. 12x12 on the floor, 6x12 on wall, and the shower is completely done in 1/2x2 mosaic sheets of white carrara as well.

Renovation was completed 3 days ago. The floor and the shower look terrific. However over the past 3 days the 6x12's are starting to turn yellow. (these materials weren't from china, they came from Italy and were top of the line) The most pronounced area so far is behind the toilet, close up attached. But even along the wall with the towel bar you can see closest to where the grout lines are there is a yellow hue forming.

My installers went to the tile store today. They think I received a bad batch b/c since my floor and shower don't have yellowing then for sure it must be the 6x12 batch was defective.

The tile store asked them what type of adhesive they used, to which my installers responded white glue. The store said "aha" thats your problem you should have used reinforced thin set on the walls for marble installation and not an adhesive. (my walls are concrete/plaster and not drywall) My installers disagree.

Lastly I have yet to seal the tiles b/c I am afraid of sealing the yellow in it... Does anyone think that sealing in this situation at this point can help?

I don't know who to believe as I am just a homeowner. Please lend me your opinions on the matter.

There was another thread posted by MarkTarkus who had the fortunate experience of the yellow going away on its own after a week or 2. Maybe I can be so lucky...
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Old 03-11-2011, 08:15 AM   #2
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Jobo,

That is a beautiful bathroom.

But lets jet one thing straightened out first.... They used a pre-mixed adhesive from a bucket to set which tiles exactly?

For this job they should have used only a white powdered thinset which is mixed on site with water. Did they use pre-mixed? Please tell me they didn't use pre-mix in the shower.

They also should have used dry powdered grout. They did use powdered grout (mixed with water) right?
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Old 03-11-2011, 08:17 AM   #3
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First thing i thought was mastic.

So, "Jobo", what did they use to stick the tiles? Precisely.
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Old 03-11-2011, 08:34 AM   #4
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Just called my contractor he said he used White Thin Set on the shower floor, and bathroom floor he used White Glue (said the brand or the name was "Henry")
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Old 03-11-2011, 08:35 AM   #5
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Jobo,

We need to get more specific. The crap stuff in a bucket is also labeled thinset, so his answer isn't clear. Did you see buckets? Did you see bags?

What is this white glue????

What about the shower walls?
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Old 03-11-2011, 08:45 AM   #6
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the floor one was mortar thin set

they cleaned up from the renovation, so there are no empty buckets lying around. I just called them and asked them to go to HD and re-buy exactly what they used.

they will be here in an hour, I will post it as soon as i know.
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Old 03-11-2011, 08:53 AM   #7
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Wasn't there a thread about carrara marble turning yellow here awhile back? Something about iron deposits in the stone?
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Old 03-11-2011, 10:12 AM   #8
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Good news... Contractor agreed that if in a week's time the yellow is still there he will replace the affected tiles. I thought it would be a fight but he is proving to be a real stand up guy.
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Old 03-11-2011, 12:06 PM   #9
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Still find out about the mastic or not. Mastic has no place in wet areas like a shower.
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Old 03-11-2011, 12:15 PM   #10
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I agree, that install looks great.

BUT, if they used mastic anywhere in that bathroom, I'd be concerned about what else they might have done... or, perhaps more importantly, what they might not have done... like shower waterproofing/moisture-proofing, for instance.

Any idea about the construction of the shower behind the tile?
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Old 03-11-2011, 09:19 PM   #11
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The only product suitable for use with CERAMIC tile (and definitely not marble) is Henry's 314 readyset mastic, which is prone to yellowing after time, and can bleed through the marble. If he used the 314 in any part of the bathroom, he is probably going to be replacing all of the tiles sooner or later, even if its a few at a time. At the same time, if he doent know what adhesives are acceptable, i too would wonder what else he thinks is acceptable. Let us know what he used everywhere. I would hate to see that beautiful bathroom ruined because of a bad adhesive.
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Old 03-11-2011, 09:35 PM   #12
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Welcome to the forum, Jobo.

Quote:
Originally Posted by Jobo @9:45am
...I just called them and asked them to go to HD and re-buy exactly what they used.

they will be here in an hour, I will post it as soon as i know.
Quote:
Originally Posted by Jobo @ 11:12am
Good news... Contractor agreed that if in a week's time the yellow is still there he will replace the affected tiles. I thought it would be a fight but he is proving to be a real stand up guy.
Well, it appears that your installers did some belated research between your two posts this morning and found out that they made a major mistake.

Sorry to hear it, Jobo. But if you don't already know, please don't skip over finding out exactly what material was used. Knowledge is power.

Do not seal anything.

Have you completed paying the tile installers for their work, or is there any balance outstanding?

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Old 03-11-2011, 10:32 PM   #13
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the contractor sounds like he is being evasive
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Old 03-12-2011, 06:10 AM   #14
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Quote:
Originally Posted by Pirate
Wasn't there a thread about carrara marble turning yellow here awhile back? Something about iron deposits in the stone?
I beleive the yellow staining of Carrera is caused by magnesium. Reddish stains are caused by iron. All naturally occuring in the stone.
This one may be the adhesive though.
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Old 03-12-2011, 07:33 AM   #15
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Staining or not, if the stains lead the home owner to discover the shower was constructed improperly then the staining is irrelevant. The tiles have to come down due to the mastic alone.

And yeah I think they are being evasive too.
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