I want to tile an outside seat which is basically an l-shaped rendered bench. Itr's currently painted white, but it gets really grubby and covered in slime in the winter and looks terrible. I want to tile just the seat and seat back area of the bench so it would be easier to clean and look nicer and so on. I have done interior tiling before and did a good job, and I am relatively handy, but is exterior tiling a whole other thing? I have googled tips and they talk about things like expansion joints and so on which makes me a bit nervous. Or do I just buy good exterior adhesive and grout and get on with it? Any thoughts? Any demon tilers out there?