Cold weather condensation in tough spot...

82tpsmith wrote:
Well this is our first season in the 5th wheel in freezing temperatures and it has been fun, but a bit challenging. Already had the 10' poop-cycle, freezing water lines, frozen fridge and all the joys of shoveling :)

I've gotten all that fixed thanks to a lot of great posts on here. But here's the most recent one.

At night, and all day I guess, I've noticed when I put my hand in between our mattress and the slide out wall there is ice build up, even frozen to the wall. I ignored this for a little while, yesterday I decided to put the pink foam-board in between the wall and mattress. i think that will keep the moisture off the mattress. Today I took the cover of our mattress and noticed a bit of mold on the part of the cover that sits below the mattress. So i then looked at the wood that mattress sits on and it is very noticeably wet and moldy. Now it's not from a water leak as it is really only in the middle of the wood frame and not the sides. My guess is that since the slide out bottom is not insulated that the super cold air is condensating to the inside wooden bed frame?? I don't know. Anyone else have problems like this. I'm afraid I'll have to replace the wood, but I just want to try and make sure it doesn't keep doing this?