No reason not to, if you like it. (I do) After all, they use it on ship's decks alla time.....

Thanks lazarususa. My contractor didn't seem to think it was a good idea (mildew etc.). I assume you lift the mats up and clean the tile underneath regularly, plus there is sufficient air flow under the teak mats to prevent most mildew problems.

Sochi,

Teak is great for inside the shower. Teak itself will not rot, or gather mildew, however soap/shampoo residue can collect mold. This can be cleaned off with hot water, Murphy's soap, and a nylon bristle brusch. You should cleant the bottom of the mats, and floor every couple of months as well. Teak is a better choice then cedar, as teak will last a lot longer.