Designing Kitchens and Bathrooms - tile grout turn green?

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cyzpro
05-02-07, 08:11 PM
Some of my bathroom tile grout is turning green. I can clean it up, but I like to know what is causing it.

HotinOKC
05-03-07, 07:34 PM
The is mildew/mold.

To prevent this, apply some clear silicone waterproofing to the grout.

You can find this stuff at any Home Depot/Lowes or flooring store.