How do I waterproof a wooden shower?
I'm making a man-cave bathroom. I want to line the shower with wood, most likely boards from wooden pallets. I know I need the cement type of drywall. Do I need a liner? I will lightly sand the boards, but how do I waterproof the boards and prevent water from seeping between them? Do I waterproof the boards on all sides before mounting them? Or just the facing surface once they are in place? Do I caulk or glue between them? I'd like them to look just like a wall. The pic is of the gutted bathroom. Shower will be walk-in, 30" x 5'.