Marble - Natural Vein Or Crack? - Tiling, ceramics, marble - DIY Chatroom Home Improvement Forum

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Old 02-12-2014, 09:31 AM   #1
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Marble - natural vein or crack?

This is the first time I am working with marble. This is only for a hearth and surround for my new gas insert. I ordered 8 12" by 24" pieces. When looking at the backs, 5 of the 8 tiles appear to be cracked. Researching online leads me to believe they could be natural veins. The cracks do not extend to the front. There is also a plastic mesh glued to the back to help for stability. Of course when I spoke to a sales rep them said that it is no problem.

Is this vein/crack anything to be worried about?

Can I use regular thinset mortar? Both the sales rep and my cousin who does this for a living said yes. Research online says that i should use a special thinset with an epoxy in it. I just happen to have enough of the gray thinset leftover to complete.

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Old 02-12-2014, 09:58 AM   #2
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A picture of the face would have helped---

that looks weak--but on a fire place? Probably fine---


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Old 02-12-2014, 10:02 AM   #3
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The face is perfectly fine. Glossy black with a handful of grey/white veining streaks. I can not feel this crack when running my fingers along the front.

Yeah, I would be a LOT more worried if this was flooring that would be walked on.

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Old 02-17-2014, 05:48 PM   #4
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I mostly tile for a living too, and I always use the thinset for marble but for a fireplace you should be fine. I wouldn't stress it too much.
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