Quote:
Originally Posted by Madman
That's concerning to hear.
We have some black spots in the bottom edge of caulking in our shower. I've always thought it was just a shoddy caulking job or product and not caused by water behind the tile itself.
If I remove the caulking, any way to know if the water is behind things without ripping tiles off?
The house is less than 10 years old - anyone know if is this a home warranty thing possibly?
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It doesn't automatically mean water behind the tiles. A shoddy caulking job (or trying to caulk over caulk) is going to allow water in behind and will mould/mildew up pretty quickly. If it is "good" caulk and water is behind it, then yes, probably came from behind. But even the best installed wall tile will still allow some moisture behind it (grout is pourous even when sealed). Key is mitigating the risk by installing correctly (vertical thinset channel, proper backerboard, drainage).