I had a new bathroom installed in may 03. In the last few months I am noticing yellowing of grout in areas where water doesn't hit. It doesn't form on sides of shower walls where water runs during a shower. I am getting yellowing of grout on tile ceiling of shower stall & on wall by light switches. In places that are nowhere near where water hits during shower. I have 2 exhaust fans in bathroom due to this being a townhouse & bathroom does not have a window to try & dissipate moisture. But I have never seen anything like this. If I leave a towel on bottom of tub after a shower, after all is dry I have little yellow spots on towel from dripping condensation coming from grout joints in shower ceiling. Anyone have any ideas? I cannot find anything or anyone anywhere that has a clue on this. Please help!!
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No. And I'm going to do that. Do you feel that will stop it? keep in mind the yellowing isn't only in shower area. it happens on other side of room also.
If you seal now, it may set in the yellow. You may need to have grout removed and then have the grout redone, THEN seal it.
when you clean the yellowing it does go away for a short time. you think even if cleaned real well & sealed it's too late?
[This message has been edited by AngeloS (edited January 12, 2004).]
It may be mold or mildew.
I have a similar yellow gunk that accumulates on my cold-water pipe that runs across my basement bathroom ceiling when I take a shower. Condensation sits there and a little mold or mildew grows, I think. From my painted steel pipes, it wipes right off.
For you, you'll want to be able to turn to regular bleach to remove mold or mildew if that is what it is. But bleach seems to remove most sealers. Once your grout is sealed, far less mold or mildew will grow since the grout won't actually get wet and will dry as fast as your ceramic tile.
There is an invisible and permanent sealer for your grout that can be cleaned with bleach without hurting the seal. A clever search will find it. If you have trouble finding it, let me know.
