I just joined the forum.
I have just spent an hour reading the various posts going back in 2014. Interestingly the debate over insulation and condensation hasn't changed.
Most of you are seasoned builders or have already done many van builds.
I live in California, I just bought a 2019...
So many threads on insulation. The more I read, the more uncertain I am. The recent post on thinsulate vs. polyiso vs. SM600L thinsulate was educational. I liked the SM600L spec sheet. Am starting on the ceiling, and purchased 3M HI-Strength 90, but haven't bought the insulation yet.