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Old 07-06-2022, 12:10 PM   #1
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Join Date: Aug 2018
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Default Bathroom ceiling leak and roof compositon

Hi !

Proud owner on a 2008 x139 here !
Last month I noticed bubbles on the ceiling of the bathroom next to the vent (see picture). I cut the delaminated white board membrane.
From the hole of the vent , it looks to me that the ceiling is made from a thick plywood...but I know it's not the case. The back area (where the water was stuck) seems to be hollow behind the backing.
Is it nomal or my ceiling is completely rotten?
Can I just change the ceiling plywood without removing the roof plywood ?

Thank you !!!
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Old 07-08-2022, 11:55 PM   #2
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Sorry I don't know the answer to that one. I have the same year and model trailer. Out of curiosity do you know where the leak started?

2008 FF Cruzer 139X
2013 Honda Pilot 4WD
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Old 07-18-2022, 01:32 PM   #3
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You'll need to replace the inside ceiling board anyway so I'd advise carefully removing it first. This will allow you a peak at the condition of the roof plywood (from inside/underneath). Based on that info you will be able to make a better decision on how much farther you need to go with the roof repair before removing the outside roof material. It may even allow you to better see where the water is entering.
Steel yourself, the news is usually not good.
2005 T139FK
1995 Chevy G20 aka "Big Blue",
1994 GMC Camper Van,
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Old 07-22-2022, 11:29 AM   #4
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Of course, your specific trailer may have been built differently , but the roof construction of both of my 2006 and my 2012 x189s were the same. Each had a refrigerator vent cap that could be removed with four screws. A cross section of the roof's sandwich construction could then easily by viewed and understood without having to break any roof seals. You roof's construction is likely (top to bottom) the rubber skin, thin luan ply, aluminum frame with Styrofoam board, thin luan with a decorative plastic skin.
In my opinion, a careful, "on your knees crawling around on the roof" inspection will likely show where water is intruding the rubber membrane.
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