If possible, I'd like the floor to be tight -- no gaps between boards like you would have on a deck.
I have a little bit of Z-height to work with here, so I was considering laying down treated furring strips, and then screwing or gluing flooring planks onto them.
I do intend to paint it all when done.
My concerns include, of course, having the whole thing rot out under me. I'm also concerned about expansion if I don't have gaps between boards.
What have others done for this type of project? What type of wood would make sense for the flooring, both for the furring strips, and for the flooring itself? Is a gapless approach advisable? I know of plenty of old houses with porches that have plank floors without gaps, so there must be some good way to do it...
I appreciate any comments.