Not to pile on here, but when an interior wall in our 2014 Cedar Creek started to come apart 2 months into its use, and I looked under the 1/8" thick paneling that was falling off, I found a wooden framed wall. I expected aluminum, checked the brochure and it showed the exterior wall being aluminum, and said nothing about the interior walls. I was ok with that until the wood frame was found to be defective (the factory used scraps of wood that were not the correct dimensions) and the wall self destructed. I put it all back together with 2 new pieces of wood (cut to the correct dimensions) the way it was designed to be, added some wood glue to key places and used wood screws rather than staples on the frame pieces and the wall has not had an issue since.
Lesson learned, read about the construction with great care - marketing communications blurbs can lead us optimists into thinking the product is more than it is.
2012 GMC 3500 Duramax Crew Cab, SuperGlide 20k
2014 Cedar Creek 36B4, LP Onan, Level-Up, Trail-Air pin, electric fridge