Enclosed underbelly

Its a great thing for the manufacturer to keep the shortcomings out of sight such as crushed ducts, wiring that is stretched too tight and looks like a rats nest or ran on top of joists with subfloor over top of it, missed or improperly installed insulation, etc. When I had to pull the coroplast down to reinforce the frame at the leveler attachment points on our Grand Design, we found all sorts of **** workmanship along with enough hardware to stock a small store, enough wiring and plumbing scrap to fill a bucket, and enough sawdust to line a couple of hamster cages, and two empty Coca Cola cans.

Keep mice out? Good luck with that, better buy a case of blow foam and tape and get to work.