



Based on what others have posted about condensation issues in cold weather because these campers have no insulating feature for the top bed, I chose to do something a little different for cab overhang bed board.
From my salvage camper, I cut out a section that would be on the bottom and exposed, because it was only 3/8 thick with an aluminum skin that was glued to it, thus very weather/ water resistant, and I used butyl tape to seal it the channel perimeter.
Then a middle section for 1/2 inch foam insulation R-3
On top was 3/4 inch pre finished Birch plywood, which is the primary support for the whole bed arrangement.
I know I'm giving up a little space in the bed area for mattress thickness, ( there's still 5 inches), but I'm hoping this will reduce condensation under the mattress from warm bodies in cold weather. We'll see?
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