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Old 02-05-2008, 09:56 PM   #1
Cholt13341
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Tile Shower - Wet Grout Spots

Hey everyone,


My question is about how to avoid wet looking grout spots in a tile shower.

A bit of background:

I have not yet grouted, but:
The Shower is already constructed.
Preslope, Shower Pan Liner, Slope, and Tile.
The shower floor is natural stone 1x2 inch
The shower walls are porcelain 13x13
Grout lines are 1/8 on floor, and 3/16 on walls.
Walls are backed with Cement Board.

I've built a similar shower before and I've noticed that certain spots of the grout seem to never dry. While most of the grout does dry, areas of the floor, close to the ceiling, and in corners seems to remain wet. Why is this?

To avoid making a similar mistake on this shower.. what should I do? Is this a grout sealer problem? Is this something all tile shower's do.

Any help would be greatly appreciated!!

Thanks,

Chris H.
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Old 02-05-2008, 09:58 PM   #2
ceramictec
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what did you use to set your wall tile with??
and what type of grout is on your walls ? (sanded or unsanded)
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Old 02-05-2008, 10:01 PM   #3
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Wall and floor tiles are set with fortified thin-set. There is no grout yet. I plan to use sanded on the walls and unsanded on the floors.
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Old 02-05-2008, 10:30 PM   #4
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I've just read alot about Spectralock Epoxy grout. Other than being hard to work with, is that something to consider for a shower installation??

Chris
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Old 02-06-2008, 04:17 AM   #5
ceramictec
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yes the Spectra lock would work fine.
most likely the sanded grout is holding water and drys slower in some area's.
you could also seal the grout to help stop most water from absorbing into it.
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Old 02-06-2008, 07:22 AM   #6
Cholt13341
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I sealed the grout in the previous shower i built, and still the same problem. The grout that appears wet will continue to look wet for 3-4 days, while other spots dry within 2 or so hours.

If I use SpectraLock will any of the grout ever look wet? Since it's an epoxy based product, I'm assuming it's pretty much water proof (in terms of the grout itself not absorbing water and showing a 'wet look')

Am I correct on this, or will Spectralock show/absorb water like Portland based grout?
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Old 02-06-2008, 07:30 AM   #7
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Yes, you are correct. If you use it, mix a little at a time until you see how fast you can grout with it.
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Old 02-06-2008, 10:33 AM   #8
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We clean and seal grout; if the sealer you use is of good quality and the preparation you did before the sealing was correct, then the grout should not show very noticeable signs of wetness. You may not have, in the old shower, prepared before nor used a proper sealer so we can't say much more than that.

What you are seeing, in your new shower, is the thinset you used to stick the tiles with; strictly-speaking, the mortar should not become dripping wet - but if it does wet a bit it should release the humidity very quickly or mould will set in. Now why it is only noticeable in certain areas may be a ventilation problem - as I assume you're not taking showers without having grouted first (!). LOL

But IMO using an epoxy grout may be more difficult than properly grouting the tiles in the first place, waiting till the grout sets properly then sealing with a quaility sealer (some that can give 7-10 years warranties against moisture infiltration) - that would be the easiest. Epoxy grouting may be something you'll hold over our heads for recommending in the first place; some pros might recommend it to one another - but it's not everyone's laugher...so don't say we didn't warn you! LOL
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Old 02-06-2008, 12:48 PM   #9
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CCarlisle,


Thanks for the help. I haven't showered in the new shower yet, as there is no grout. I just don't want to make the same mistake again, and have some spots remain wet.


The wet looking spots on the older shower really make it look dirty, so I want to do whatever I can to keep this from happening again.

Iíve read a lot about epoxy grout and it seems to be incredibly difficult. Iíve done quite a bit of tile work in the last 5 years, but this is only my 2nd shower.

What brand grout and sealer do you recommend to block against moisture infiltration. The last sealer I used was purchased at Home Depot. TileLAB, I believe. Cheap, yellow bottle. Maybe I should have spent more on the sealer???

Thanks.

Chris
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Old 02-06-2008, 12:56 PM   #10
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TileLAB, I believe. Cheap, yellow bottle.
That's your problem, at least most of it.

I'm sure a quality sealer like those from StoneTech, AquaMix, and Miracle Sealants brands will do a much better job.

However, impregnating sealers, even the very best ones will not totally waterproof a cement based grout. You can expect some water to be absorbed and some discoloration. However this should be minimal and dry out quickly in the matter of hours, not days.

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Old 02-06-2008, 03:12 PM   #11
Cholt13341
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Great!

Thanks guys for all your help. I'll use a better quality grout this time, and skip the epoxy grout.

Thanks again,

Chris
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