Class C overhead movement causing seal failure

The bunk board is flat. If you look at the picture I posted on 12/1, you can see a side view of the front wall. That wall is a combination of a couple pieces of wood going across the front (mine were rotted and had to be replaced) and foam. The foam is notched so that it can be bent around the corners. Our foam was salvageable. The bunk board is secured at the walls behind both cab seats and around the cab roof cut out as well as to the bottom of the side wall wings.