Diary of a camper conversion
I used this stuff in the last van and it seemed to go well. I didn’t open her up to check, but 11 years of service speaks for itself.
This is recycled bottle insulation. It’s cheap, readily available from B&Q, not itchy like the rockwool stuff, and doesn’t hold moisture so it’s widely used in camper conversions.
To install you just use spray glue and then whack it up. It’s very satisfying to see so much progress being made.