Epoxy grout and mold

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  #1  
Old 11-02-17, 07:50 AM
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Epoxy grout and mold

We live in the Houston area (high humidity) and had a shower built in the master bath. The tile provider suggested we use epoxy grout for water proofing and no mold. We also installed a larger vent in the ceiling to vent out moisture.

Now, not even a year after it was installed we are seeing mold in the grout. Obviously, were not very happy.

Were our expectations of the epoxy grout correct?

What might we do to solve the issue? Should we remove the epoxy grout (wont be easy, I know) and re-grout?

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Old 11-02-17, 08:39 AM
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Mold can grow on the surface of even epoxy grout. Have you tried cleaning it off?
 
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Old 11-02-17, 08:44 AM
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It's not the grout but all the krud that collects on the grout, you still have to keep it clean.

\My bad, just repeated what PD stated!
 
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Old 11-02-17, 09:48 AM
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Thank you for the reply.

Yes, we tried cleaning, which did not work. Then I took my utility knife and gently scraped ways the grout to see if that made a difference, which it did.

It looks like maybe there are some low spots in the grout where water is settling. Is it possible to build this up without removing the old grout or do I have to take out the old grout?
 
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Old 11-02-17, 11:18 AM
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New grout cannot be applied in thin layers, which is what would result if you tried to do so without digging out at least much of what's there now.
 
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Old 11-02-17, 12:01 PM
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you are likely just scrapping away the krud and grout which is making it look new. What are you using to clean, a tile cleaner, smells like acid?

Epoxy grout is a little better due to the epoxy but the repair area has to be clean and would take out some additional material just to be safe!
 
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