Not new to Rv's or 5th wheels but one can always learn. We're in the process to purchase a new, never titled 2018 Bighorn 3500SE. Wednesday we spent 2.5 hours going over everything. Usual minor fit and finish punchlist items you find with a new unit. There was one major job they have to complete before we do the deal. The caulking between the roof and rain gutter had A LOT of cracking. There was also a lot caulk around the slides that needed touching up. Our 1st 5th wheel went 7 years uncovered and crossed the country 4 times and the caulking was in better shape than this new unit. Of course they explained it as sitting for 2 years and are going to reseal everything. No sign of water damage or penetration anywhere. My question, does anyone know of any caulk application issues for 2018 builds. I'm satisfied with our PDI and that it will be repaired to our satisfaction. Just seemed odd that it was already starting to deteriorate.