With high-tech new sandwich composites coming to market as quickly as they currently are, and in the process becoming more and more affordable to use in RV construction, I think the concept of a completely uninsulated RV likely isn't sustainable in the long term.
When you introduce altitude into the equation, cold weather (and thus condensation issues) stretches into half a year for many locations in North America.
Compounding this thought is that most of the new sandwich composites are as light, or lighter than the comparable aluminum frame and skin construction - and offer amazing levels of insulation by their very design.
This forum has recently highlighted some incredible RV's constructed from contemporary composite sandwich materials - I think we'll be seeing lots more of them in the not too distant future.
Hit Mark (jeep) up about making an Alaskan type hardside popup out of modern composites.
Sent from my Passport
Mark's the guy I'm actually watching to do something like a fully composite sandwich truck camper! (how did you guess that?).
I'm reasonably local to him, and some of the designs he's come up with to date are pretty cutting edge.
He's got his composite flat deck rig on the go, and is on the cusp of releasing his modified composite teardrop trailer ... hopefully he might next consider a look at a true lightweight truck camper that isn't any larger than what's actually required for overlanding.
Seems like what the Euros have been doing for years, is taking an awful long time to catch on here. Most of what we have here is junk at premium prices.
I have been keeping up with what Mark aka Jeep has been doing. Looks great! Though a little too big for my taste. A Tacoma sized camper would be nice...