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Old 07-07-2011, 06:38 PM   #1
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Good moisture proof sealant.


I have a tiled second story balcony the water leaks through when it rains. It is my belief the water is soaking in through the grout since the tile is a waterproof ceramic tile. Does anyone know of a good waterproof sealant that will prevent moisture from penetrating through the grout? Thanks!

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Old 07-07-2011, 06:56 PM   #2
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Good moisture proof sealant.


are there gaps where the balcony joins the house? are there gaps around the edges of the tile? pictures would be most helpful. seal all the gaps you can find around the tile with silicone. you might have luck taking the grout out and using an epoxy grout but i doubt that the balcony is waterproofed under the tile. do you know what was put under the tile? the balcony should have been waterproofed before the tile was put down. where does the water leak through? the bottom of the balcony or into the house? also is the balcony pitched slightly away from the house like it should be for water runoff? i would say to fix it right you may have to rip everything down to the joists and start over and do it the right way.

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Old 07-07-2011, 08:27 PM   #3
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Good moisture proof sealant.


Quote:
Does anyone know of a good waterproof sealant that will prevent moisture from penetrating through the grout?
No.
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Old 07-07-2011, 08:47 PM   #4
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Good moisture proof sealant.


Under the tile I have a 3/4" plywood sub-floor. On top of that I have a 1/2" sheet of Durock cement board, and on top of that I have some of that orange Schluter Ditra membrane. The trouble is that once the water gets through the tile it still has to escape and finds its way through the remainder of the flooring. I think you are correct in that they did not use epoxy grout and that I will need to remove the original grout and replace it with epoxy grout. The balcony leaks outside the house and it has a good slope to it.

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Old 07-07-2011, 08:55 PM   #5
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Good moisture proof sealant.


The lack of epoxy grout isn't the problem. If the system was installed properly epoxy grout wouldn't be necessary to begin with.

Is the DITRA "flashed" to the structure wall?
If so how and with what?
Were the DITRA seams sealed?
If so how and with what?
Why is the cement board there?

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I will need to remove the original grout and replace it with epoxy grout.
That would be a waste of time and money.

When you say "I", do you mean "them"?
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