So after doing a bit more reading and thinking about the problem we had last year with a rat eating the duck eggs. I think I may now be leaning now towards having a full wood floor for the new barn/coop. This way I can brace it on concrete and stone pads so that it is raised up from the wetness. This will also allow a hose out of the floor if it gets necessary. If I wind up with a rotted floor, well, thats what they make saws and jacks and replacement boards for!
What do you think of that?