Welcome to the forum its a great place to get your questions answered. Check the warranty papers for the type of roof material and care. As for construction you may try youtube there a lots of video of factory visits and trailer construction.
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho