I have a 2008 Classic 25fb and my vinyl floor is buckling. The floor is not glued down. Its attached somehow around the edges and then the furniture and cabinets are installed on top of the floor. Since moving from Texas to Missouri the extreme cold during winter storage has caused my floor to buckle around the kitchen area close to the cabinets, the dinette area and in front of the entrance door. The floor expands and contracts and because the weight of the furniture and cabinets the floor isn't able to float to retain its shape. I checked for water leaks but the Airstream is stored under cover and I haven't found any leaks in the areas of the buckles.
I'm having my vinyl floor removed and replaced with Maromrleum, which is glued down, sometime in May. They will be taking out the dinette, side lounge, front bed and the kitchen cabinets to lay the floor.
Here is one thread:
I usually use Google search to find threads on Airforums.