Thanks for the brochure.A 2006 Seabreeze will have a 1 piece FIBERGLASS roof. Nothing to worry about here unless it has been damaged. All joints will need to be checked however, they can still leak if not kept up. I recommend going on line and looking at the brochure's for that coach. Read the specs for yourself, instead of listening to guys that DON'T know what they are talking about are saying.
By the way, that GM chassis was an option that year.