This is what I found when I went to repair the softwood at the rear of my trailer. After pulling out a lot of rotten plywood there was standing water between the plywood and the insulation. Due to the insulation there was nowhere for the water to go.
I just picked up some Coosa wood today and will be replacing everything this week, I hope. I have already fixed the area on the bumper where the water was coming in.
In the limited locations on my rig where I have had to access under the plywood, I've found only fiberglass. Does anyone know in what models or years they began using that impermeable layer?
I'm not sure. But mine is an '06 and, as you can see, had reflextic type material that runs the length of the trailer. The problem is the water can't drain when it gets between it and the floor. Then it causes issues everywhere the crossbars of the frame hit because it sloshes around when driving.
In the front of the trailer I've drilled through the floor in several places and punctured the membrane so I hope to avoid possible future issues there.
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