CoyoteThistle
Adventurer
HC is 1/3 heavier than any type of foam core panel (same thickness) with virtually no insulation value. It's true that they are stiffer and overall more resistant to impacts but why construct with composite panels in the first place?
I'd be curious to see the numbers you are using for your claim of 1/3 heavier. My research shows that they are very close in weight or lighter. Either way, factoring in cost, availability, strength, ease of construction, etc. is how I will be making a decision.
Out of curiosity, what do your panels weigh per sq. ft.?
As for insulation, my current camper is HC and the insulation is not virtually zero. But I'll defer to the experts: