I have gutted a 3 story old home in Florida. It has a crawl space (with wood floors on the ground) and the 3rd floor is a unfinished attic (the stairs go up to the attic).
I can't figure out the best way to insulate the interior walls, floor and the attic. A special problem is the attic, because if you look up you just see the interior of the roof.
My guess is that a mix of options might be best (financially and practically). I'm paranoid about closed cell being blown on the underside of the roof because someday it will leak and I won't know it (causing uncontrollable rot).
Can anyone suggest a plan?