I have a house that I am building on a river for a client and the master bedroom has a balcony that faces the river, the balcony is under roof, but not closed in(open air).  The question that I need help with is WHAT KIND OF FLOORING SHOULD I USE ON THE FLOOR.  The floor is about 90 sf, on the north side of the house, and there is a covered porch below this balcony so the balcony floor is constructed with 2 x 12 joists that are ripped to give the flat roof just enough slope for the water to drain.  3/4″ plywood sheathing, rubber membrane applied on top of 3/4″ plywood.  Finally 2×4 sleepers ripped to bring the floor back to level and some kind of T and G flooring attached to the sleepers.  I do not want to use traditional pine t and g because of the maintenance issue.  Any Sugestions? All my suppliers are saying that most t and g products need ventilation? Is there and synthetic flooring that I can use,  is the best bet a brazilian hardwood? Thanks