Just found water damage

Wallpaper......or get creative and do some bead board with chair rail trim.

GTO66 wrote:
I would check the fittings under the window.

Thats exactly what I thought it might be, but I hooked up the hose and no leaks.
I checked on it this morning before I left, and the wood was almost dry, so it has to be the window.
Now I have to find some of the funky wall paper that Jayco uses.

I would check the fittings under the window.

At least you found quickly. Last year I came back from Hilton head and noticed by bedroom slide floor was sagging and roller was cutting the fiberglass. I pulled the floor bottom out and was soaked with water. Resealed window and made new floor out of frp. 50 bucks and a couple days work but no rotten wood and everything is fine. Good luck to you.

Thanks for the info, and link.

Every year it's important to tighten all the screws around the perimeter of the inside window frame. They loosen up because the flexing and twisting of the frame keeps compressing the butyl tape between the frame and the sidewall. After about 10 years you really need to pull the windows and replace the tape with new. Trying to use any kind of sealer around the window frame to wall is an exercise in futility as the first few flexes going town the road will likely break it free. Butyl tape has been the only thing that has proven to last but still needs annual attention and replacement every 10 years.
https://www.amazon.com/XFasten-8-Inch-30-Foot-Sealing-Patching/dp/B07663NFZZ/ref=sr_1_1_sspa?crid=14ES67WMT2JQT&keywords=butyl+tape&qid=1556621494&s=gateway&sprefix=butyl%2Caps%2C210&sr=8-1-spons&psc=1

Sorry to hear about that. Windows are a huge source of leaks especially the "frameless" ones which you do not have. Water has probably gotten in around the frame or the weep holes may have become blocked. The problem with frameless is the seal can get pinched when installing and you'd never know. The water will travel around the window frame and into the sidewalls. Meanwhile you don't even know it.