I replaced the floor on my 16' Starcraft.........twice. Made the mistake of using pressure treated plywood the first time (seemed like a great idea) but it de-laminated the first season. Used marine grade the next time. My floor was attached to the aluminium stringers with rivets.

Charter Member
Ancient order of the 1895 Winchester

"It's an insecure and petite man who demands all others like what he likes and dislike what he dislikes."
szihn