Back on the subject of water leaks....
I started noticing a red stain on the outside of our "Cab-over" a few months ago on our 2011 3101SS. Never gave it much thought until we got ready to head down to Arizona and when I was pulling out of the driveway water started dripping on my head. We pulled over and looked under the mattress of the cab-over berth. It was SWIMMING in water! The stain on wood was coming off (hence the red stain on the outside), mold was growing, the fabric of the mattress was soaked as was the foam on the inside. What a mess.
Down in Sedona, we took everything out so it could dry in the 108 degree temps! I ran to a store and got some silicon sealer and got up on the roof. Sure enough, both top edges (where the cap is sealed to the RV), had 2" - 3" areas where the silicon had split and was allowing water to pour in when it rained (like it does 300 days a year here in Seattle).
I was so disappointed that an RV only 2 years old would have those sort of issues. And, to add insult to injury, as I started checking elsewhere on the roof, I found the seals at the rear of the RV on the roof were also coming loose! I went back into the RV and started looking at the ceiling of the bedroom area and sure enough you can see black and red stains coming through the headliner.
After we got home I contacted Forest River to see what they could do for us. Nothing. Since it was a used RV when we bought it, the warranty does not transfer for the that portion (only the Ford Drivetrain, etc..)
Next step was to contact Progressive to see if they would cover it. Nope. They could not be certain the seals were cracked or split as a cause of low branches hitting it, etc. So, we are on our own since the policy does not cover water leaks.
Just took the RV down to a local repair facility to get a quote. $7000.
I guess the lesson learned here is to check your roof all the time! The place doing the repair will check ours for no cost every 6 months after the repair.