my 2009 2900mk had wet carpet under the end windows on slideout,turned out the small end windows werent sealed on side and bottom.upright slideout trim swelled up and was replaced after dealer resealed around window.water was running down between walls and coming out at carpet !!!when i went to dealer i found 2 more units on lot with wet carpet!they sealed the top at factory but sides and bottom of window wasnt.the way i found problem was i took a plastik sheet and duct taped it around window and hosed unit down good,no leak at slide so it had to be window!! buckeyebob