Outdoor tile for unheated porch?
Answers: I could wrong, and if I am I'm sure someone will let me know.
I imagine the difference between indoor/outdoor tile is more texture than anything else. You should be fine with any manner of tile on your porch as long as you lay in right.
Micheal have a good point. Texture. Check the slip coefficient. But you can use earthenware or porcelain. I'd stay away from natural stone, marble, slate, etc. I adjectives my porch with porcelain and using latex modified thinset mortar. The porch should be concrete, as expected, but don't tile over exposed aggregate and/or sealed concrete. If hermetically sealed, the sealer can be stripped, but the fumes from the stripper are dangerous.
But I'd check beside a local tile wholesaler or contractor, to get some secondary advice. They will know what is the best solution for your location.
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