funflair
LIFE MEMBER
Not many use Polystyrene hopefully but quite possibly in some budget vans the trouble s they still have wood as well so foam holding moisture and wood in the build are not a good mix, the interesting thing with PU vs blue XPS is that PU has better insulation properties as long as it stays dry, PhoeniX use PU and Morelo Concorde and N+B use XPS, of course a bit of moisture in any of those 4 vans wouldn’t cause a problem.Interesting, so did they say who uses the leaky stuff?
Martin