Other than condition of powertrain and chassis, roofs are a major concern when shopping for used class A rigs. We went through this about a year ago after an exhaustive search into the class A world, seen and drove over 30 rigs to figure out which chassis and powertrain would suit our needs best. Truthfully, I was not as concerned about the build or materials used for the roof, moreover was condition and general upkeep on seams and seals around roof protrusions.
To that point, I did not actually know which kind of roof our current class A had, just knew it was properly sealed after walking atop during personal inspection prior to purchase. Turns out our Monaco was built with a metal roof, would not have mattered if it was made from other materials to us, again I was looking for condition and upkeep. It was in immaculate condition for it's age, prior owners were older (78 & 84) and had all maintenance and upkeep done professionally.
