If you already like Azdel (and who shouldn't) you should look at Lance. Lance doesn't vacuum bond their walls, they pinch roll the at least 3 times and delamination on any Lance is pretty much unheard of. Vacuum bonding is where you find the delamination (from a pin prick, or thin surface even)
They also don't have the stink of formaldehyde that's all too common in travel trailers.
Lance Travel TrailersYou should also find the Lance Factory Tour on those pages, they're manufactured and assembled in a superior way