I bet the layer of paint is really helpful. Even though I had plastic bins on the floor under roosts before I switched to poop boards, I was very unhappy with how the random poops stuck so hard to my wood flooring. It was flooring that I'd salvaged, wide plank heart pine. I was just new/naive and thought I could keep it clean. No such luck. Eventually took out, replaced with tongue and groove cedar and installed poop boards. It's not painted because it's only in my brooder room. My big girls room is painted plywood (with poop boards.) The paint for sure helps with cleaning up the random accidents!Just 3/4” pine pressure treated and painted. If you use enough pine it will remain dry and kinda fluffy.