Inspired by Tim Weber's build I've started to plan out my own similar project.
Here is a rough mock up:
I'm not going to bother with framing it, I'm pretty much just planning a box consisting foam insulation sandwiched between layers of plywood or OSB. . . Which leads me the reason for this post. . .
I'm a little bit concerned about the moisture resistance of the board material that I use.
I want to use OSB because I like the price, but I'm worried about it swelling from the damp conditions. With blowoff potentially bubbling over here and there and general condensation I'm concerned.
Does anyone have any suggestions? Is it possible to seal OSB? Maybe with some oil based paint?
Any suggestions would be greatly appreciated. . .