Hi, we bought the same model in August 2014. Our unit was on display on dealer lot in Louisiana for a couple months. The morning we toured it there had been a blowing heavy rain, all slides were out and it was dry as a bone inside. We checked every cabinet/closet/window for leaks including the kitchen which is at the front behind the one piece nose. All dry!! This is our 2nd Rockwood and both have been a good experience. We just camped the "rainy" cold week of New Years here in Texas and a no problems with leaks! Check all the chalking as part of regular maintainence. We love our WJ 2618W. Best of luck!!
2015 Rockwood 2618W, 2-A/Cs 50 Amp
2014 F150 Ecoboost, S-CREW 157" WB, 6.5' box, Tow Mirrors, Maxtow, 3.73
Equalizer 4-pt WDH