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Old 03-08-2007, 04:45 PM   #1
mike_lee
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Question Should corners be grouted?

A person who grouted my shower grouted
gaps between tiles where planes of walls intersect
(corners) as well. Now, the grout company technical
support is telling me that it was wrong and that the
gaps should have been caulked with silicone instead
to avoid cracking of the grout. I am confused because
the gaps between tiles and marble sills were indeed left
ungrouted for the silicone. Who is right and what should I do:
apply silicone over the grout or try to remove the grout and
then fill with silicone?

Thanks,
Mike.
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Old 03-08-2007, 04:57 PM   #2
ddmoit
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Mike,

The techies at your grout company are correct. But, many folks go against the industry standard and grout the corners of showers.

I wouldn't recommend that you do anything, unless the grout starts to crack. If it does, chip it out and silicone those corners.
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Old 03-08-2007, 05:36 PM   #3
Zaritile
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the only problem with leaving the grout in the last joint is that the tile needs room to expand. If this is a glazed ceramic the tile might crack before the grout. If its a porcelain the grout will more than likely crack. I personaly would address the problem now. Be carefull to not cut through any waterproofing in the corners where your cbu meets. Use a dull chisel, just running it down the grout line. Then replace with a suitable grout caulk or silicone.
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Old 03-08-2007, 05:46 PM   #4
MudMaker
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Mike,
Can you tell if the tile setter who put the tile up originally did a mud jub?
This sounds to me like you just had the tile regrouted. Were the intersections of walls grouted prior to the job?
New Shower?
Sanded or nonsander grout?
Technically, those joints should be caulked but often they aren't..
Like Dan said, what problems are you experiencing?
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Old 03-09-2007, 04:27 PM   #5
mike_lee
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Frank,

It is a new shower. CBU->thinset->tiles.
It was a first-time grout job, just the installer
grouted everything instead of leaving gaps
in the corners (he did leave gaps between
tiles and sills though (?!).

Mike.
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Old 03-09-2007, 06:01 PM   #6
Zaritile
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It will be easier to fix this now than later. Dont worry, walls aren't gonna fall down or anything, just moisture will do more damage over time in those movement areas. Your tile guy is doing what 75% of the tile force is doing by ignoring movement joints. Doesn't take any longer, its just that last little effort usually gets left out. If you mention you'd like the caulk installed, He'll prob say cool, and take care of it. 1 hour out of his day, and a happy customer!
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