R-Pod insulation question

Extra blankets work well....   we use the ceramic heater but I think the dehumidifier kills 2 birds with one stone after all this is just glorified camping. I was thinking insulating the floor or adding cork flooring would help a bit. 

I use Reflectix reflective roll insulation. It looks like foil-faced bubble wrap. I cut pieces to fit behind the shades (sleeping area and dinette) in our 179. It serves two purposes. One is to add insulation. The other is to darken the sleeping area. It seems to do a good job for both purposes.

I have not used it for the kitchen window as I want light come in there so the regular curtains are adequate. The same with the window I installed in the door.

The foam in the walls is 1" thick. The 1-5/16" is the total thickness. I accidentally punctured my outer wall using a "short" moly bolt that was a little too long thinking the walls were the same thickness as the door. Please don't make my mistake.

OK, thanks.  It looks like the 2" wall thickness that others have posted is bogus.  I really needed to know the thickness so I can get a window whose frame isn't too thick, thus requiring all sorts of work to cut it down.  Now the search begins.  We are talking about a newer model with fiberglass sides, right? I read on here that the older ones had aluminum sides, but that might not have been correct?