I am not aware of any diagrams or images. The best way to check is to go up on the roof of the coach and look at all the seams carefully. While you are up there check all the openings such as the vents, sewer vent, skylight and TV antenna. If you see screw heads or bolt heads protruding through the sealant then the dealer should address those issues. The folks building Thor Class C's are entry level factory assemblers from the looks of my coach. With regards to Thor it is a "Buyer Beware" company and requires your Quality Control Check before taking delivery. Point out all problems and let the dealer fix them before you give them your money.
