Do you have a slide? We had a Passport way back that had a missing seal (seriously!) and caused water intrusion during a hard/blowing rain. Nasty business figuring that out, and Keystone had to replace lower cabinets and dinette panels before it was over, due to warping.
As mentioned previously, check all seals (slide, lights, windows, etc.).
Beth and Joe
Camping Buddies: Maddie (maltese/westie?), Kramer (chi/terrier?), and Lido (yellow lab)
2017 Keystone Bullet 248RKS
2014 Aliner Expedition Off Road
2013 Ram 1500 HEMI