Hi shelley, almost all tiles are suitable for indoor/outdoor use, (if you think about it, they are usually put in hard wearing areas ie. kitchen/bathroom) Frost and weather conditions don't come into it, there are tiled flower beds and walls that I completed 4 years ago, that have shown absolutely no sign of wear and tear, and the last 4 winters have been particularly harsh. However, as I have said in previous posts, please ask for advice when you are buying adhesive and grout. I opened an independant tile shop last year with my husband (I just love living life on the edge!). I can honestly say that anyone with half an interest in this sector would only be too happy to give advice or answer questions. Independant shops aren't always more expensive than large chains/diy shops (sometimes we're cheaper :-)) As for bumps and lumps, if you're not a professional tiler you will be using a thicker layer of adhesive, which will eliminate most of the bumps and lumps. Besides, this is for an outside wall, it really doesn't have to be perfectly smooth, believe me you won't notice the imperfections once it's done!
My only advice would be, just do it, I still love looking out at my tree, months later, nothing beats the sense of achievement you'll feel.
The only tool I used to cut the tiles was a hammer (and a tea towel to stop flying shards).
To shelley (and anyone else looking for advice) feel free to PM me with questions, Shonastar
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