I have a similar problem with my Bigfoot
, it appears that water leaked in around the roof vent and traveled between the outer fibreglass skin and the foam until it reached the light
over the table and damaged the interior wood panel on the ceiling. For anyone wanting to know the construction of my trailer appears to be a very thin fibreglass shell 1/16<sup>th</sup>of an inch thick, then 1Ē foam and the interior is 1/8 wood panelling. The glue used is that red/pink contact cement like they use to adhere plastic laminate counter tops. The glue works well but is not water proof. The sandwich construction of fibreglass/foam/panelling forms a light weight
rigid trailer until the glue fails as it has in mine, once it delaminates it has very little strength.
I was worried that the weight
of snow on the trailer roof this winter could cause problems, so I put so temporary supports in the trailer which were 2x4ís from the floor to ceiling, with some wood on the ceiling to spread the support so I didnít have a point load. I was able to take all the sag out of the roof. The 17 foot big foot has 3 roof panels that run across the roof approximately 4í by 8í. The easiest one to take down would be the front one the only thing one needs to take down are the upper cabinets the middle and rear sections would require the removal of all the interior walls and upper cabinets.
It would be nice to find a cure without removing the interior. Iím hoping I can find a glue/adhesive that I can inject in between the fibreglass and the foam, or foam and wood that does not react with either the fibreglass or foam, and realize I will have to inject this several feet into to the void. Without removing the panels the glue will also have to work with the residual red/pink contact cement. It also has have a good working time so that I can prop the ceiling in to the correct position before it sets up.
In my case the interior panelling is still attached to the foam so I think that unless I want to rip everything out I will need to patch the paneling in place. It does look like pictures in post 5 and does have damage. For the cosmetic repair of the ceiling, is there some type of full bodied paint
that would fill the bits of veneer that will inevitably come off.
My last problem that will also need to be addressed is what is the best way to remove the roofing tar (well dried out) and the case or so of silicone caulking they used in vain to repair the leak.
I`m really open to suggestions.