Warm moist air flows to cold drier air. Thatís why we put vapor barrier on the outside of homes in the south, and inside up north.
IMO living full time in an RV in a cold climate will eventually lead to rust, and delamination on these steel frames.
If you do....maintaining moisture levels inside is key. Plus keep your heat ducts pointed toward the center of the coach. Metal sweats.
Owners of a 2018 Lance 1995
Former 02 Intrigue by Country Coach