Water damage to floor in kitchen area

[eldon005]

I recently discovered our 2018 Sunset Trail model 253RB has water damage to the floor in the kitchen area. I have cut the plastic corrugated on the underside of the trailer so I could see the extent of the damage and where the water is coming from. Attached are two photos of the damage. The floor is damaged after the tires on both sides. There is no sign of any damage towards the front of the trailer and none towards the back of the trailer. I’m guessing the water has to be getting into the floor by going between the frame and the floor in the wheel well area. Has anyone has this issue? Any ideas how I can stop the water from getting into the floor again.
Thanks

[drcook]

Go over the outside VERY GOOD. We have a Crossroads Cruiser. I discovered the factory had overlapped the fiberglass with the bottom aluminum skirting, not the other way around, which gave water a way into the trailer. I had to pull off all the trim and essentially glue the skirting to the fiberglass with caulk.

Look around the hand brace to the side of the door and anywhere that the water can get in going down the side of the trailer. Also check up along the roof line for a crack or split allowing water to get into the wall(s).

[TexSon]

Check all the seals, mine had a leak in the seal on a cellar door that allowed rain water to leak in and it saturated the fiberglass insulation. I had to remove all the fiberglass, rebuild the floor, and, obviously, replace the cellar door seal. I used spray foam insulation instead of fiberglass, not only more water tight but also fire rated at pretty much fire proof.