We own a summer business in Vermont, so have to travel in the “off season”. We have camped in N.C. as low as 8 degrees. No freeze-up, but wet plywood under the mattress.
There is no insulation under the beds, especially over the storage lockers. When we got the AS, we could look down the wall from the bed right into the locker. Look at that back wall. Almost 1-1/2” gap. New weather strip insulation closed the gap, but that’s not enough. Plus, there is a tiny access panel into the rear locker. Why? I don’t know!
So, I decided to fix it. First we got some hypervent stuff to help with the condensation that wet the plywood. That helped with the moisture last year somewhat, but not the cold.
So today, I added some 1” EPS foam insulation and topped it with new 1/2” plywood. We added 1-1/2” width to the mattress base plywood since the mattress hung over and it was hard to tuck sheets in.
1” “L” trim will hide the EPS on the aisle side.
It should help during this coming trip after Columbus Day.