Well, I did a trial with a few tiles and then covered them with polyurethane. The trial didn't necessarily go entirely to plan but I was able to establish that PU will be too soft. Epoxy is likely to yellow even indoors, so that leaves me with the following solution: 1. make the tiles thicker (not a big deal) use tile selection and a thicker tile bed to enable a relatively flat surface to be made 3. seal it with a thin polyurethane to protect from mess Thanks for the contributions.

Yes we possibly could have, however then the Entertaining, Living areas of the home would have been on the First Floor which would have meant incorporating a larger Patio on this level. You also must remember over 80% of owners of Two Storey homes prefer bedrooms on the First Floor, so you we need to take this into consideration for our clients potential resale of their home.

In Australia we have rules and regulations regarding waterproofing wet areas. Did you know that you had posted your query on Houzz Australia? Best of luck, Dr Retro of Dr Retro House

Great idea. Is there are dumb waiter lift, to get it back up there, once clean ....