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I had water intrusion in both front corners of the trailer. The bathroom is located under one of those corners. As you can see in the picture below, the ceiling of the bathroom is falling apart. The question I have is, how much has to be removed before I can put a new ceiling panel back in? I know the white material has to go, it's no longer adhering to the luan backer board. Should I also remove the luan? If I do remove the luan then I suspect the insulation - what's left - will need to also be removed. If the insulation is toast due to the water intrusion then I might as well take out the luan, right?
Can I can remove the skylight panel from the inside without affecting the rest of the skylight?
I'm planning to replace the ceiling material - the exposed white stuff - with FRP (Fiberglass Reinforced Plastic) from Home Depot. They have FRP panels and FRP adhesive in stock and FRP seems to be appropriate for this situation.
Assuming you have stopped water coming in, I would take a razor knife, cut out the white ceiling, and look see. If luan is toast, carefully cut that out. If only semi-toast, I'd bleach it to kill any mold, I'd probably glue some more luan over it, then FRP from Home depot, then generously caulk. Yes that skylight panel will come right off.
I fixed the leak(s) last fall. Those leaks caused the fiberglass exterior to delaminate. That was a lot of work to fix. I was planning to demo the ceiling today but the dishwasher at the house decided it wanted some attention.
The trim in the corners is something I need to figure out. It is reluctant to come out.
The skylight is mounted to the roof. The piece inside is just a decorative trim. Take the screws out and it will pull right out. Probably give you a better look at what's going on up there as well. The corner trim pieces are a PITA to remove but will peel out.
I agree, trim might be glued. Utility knife, be careful. Replace with slightly larger trim to cover blemishes. Don't use Automobile engineer logic, RV's are in a class of their own, and that is not a compliment.
The trim pieces if unable to be saved can be replaced by some quarter round.
I think Home Depot had some trim that would work. If I did 1/4 round it would be the plastic-like stuff, not wood.
The prior owner blamed the ceiling damage on his wife. She regularly showered when camping and frequently forgot to use the fan to evacuate the humidity. I haven't told him he was wrong.
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