Sorry to hear of your problems. Had the same issue on our 2000 Beaver Monterey. The installation method used for the Girard was to install it in and seal it to an aluminum box that is nested into an opening in the coach wall. The top of the awning unit is such that water falling on it runs back to the sealed joint where it then was supposed to run laterally along that sealed joint to the awning ends where it can drop to the ground. All well and good until the sealant fails anywhere along the top or sides and the water enters the box and finds its way into the coach wall. On our coach, water compromised the inside luan wallboard AND all the supplemental wood wall framing used to support the small window beside the passenger seat. Once probed, it all fell away in a rotted wet mess.
Short repair scenario for me (do-it-myself) was to thoroughly remove and clean the sealant between the awning and the box and reseal it with white Lexel. Inside, I removed a small cabinet over the door (very tedious job), and the wallboard from the windshield to a point about 4 feet back. Left it open to thoroughly dry. Removed and replaced all wood wall framing. Recovered the wall with a single piece of Formica ordered from a big box home store. Made templates to outline the various cuts needed, then fitted and adhered it to the foam wall core and new framing. Added back the wainscot belt trim and added a vertical trim piece to cover the transition from Formica to original wall panel. Finally, I replaced the cabinet (another tedious job!).
All in all, not much fun, but satisfying once complete!
The repairs were still serving well when we sold the coach about 3 years later. Had I taken it in to be done I would have asked the shop to pull the awning from the box for a thorough look see at the whole situation, something I could not do at home. The evidence of water entry for us appeared to be the front mounting bolt holes where the awning bolted to the wall and rust on the hardware told the tale.
