Have a 40X40 corn crib, horizontal boards with one inch spacing, and a 60X60 hay barn, with vertical boards, with metal flashing between boards to seal it. Now, at a decision point what to do, what to do. They need attention. I don't think painting them is a solution, the boards are not horrible conditions, but kinda bad. So... I read that one guy put up metal siding right over the top of his old old barn. Just put the metal up against the side of his barn, and fastened it on. Done. Well, is it that easy or what can I learn about that. Should one put TYVEK on first? Or no, do not put TYVEK on first as that would be bad. Etc. Another option, though seems like going backwards, would be to rip all the boards off and put all new boards on. Could be cheaper than metal? Maybe? I don't know. I want to get the siding of those old barns fixed, but am not a construction person, and want to learn some successful options.