Air pocket under tile edge, will grout seal and last?

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Old 03-10-17, 07:35 AM
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Air pocket under tile edge, will grout seal and last?

We've had tile installed in our tub surround - long story short, the contractor the big box store sent (yes, 1st mistake) has left edges of several tiles without thinset behind - I can put a piece of paper behind the tile up the bottom 3/4" of the 12"x12" tile... The tile seems to be firmly stuck to the Kerdi Board behind.

Question: when he goes to grout the tiles (1/4" grout line) will the grout have to be pushed up behind the tiles so that it has something to attach to? Or will the grout be ok with regular application, even though some of the grout near the wall behind, will not be attached to anything?

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Old 03-10-17, 08:31 AM
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If it were a floor where you would walk on it I would be more concerned. Some grout may squish behind the corner to offer some support and since it's a wall tile and as long as you don't whack that spot with a hammer it should be OK.

How was the wall behind the tile prepared? Is it cement board or Hardie Backer?
 
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Old 03-10-17, 08:57 AM
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Definitely not OK for a floor installation, not sure about a wall....

I think I would ask the contractor to explain how that is acceptable and see what he has to say.
 
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Old 03-10-17, 09:23 AM
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Since you are paying for a professional install, I'd have him remove those tiles and install them correctly. I agree it will probably be ok on the wall as is.

btw - welcome to the forums!
 
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Old 03-10-17, 04:54 PM
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To be brutally honest, he either doesn't have any idea how to install tile right or doesn't care. Call the store and complain. That is unacceptable.
 
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