I have read about using Glasbord or FRP (fiberglass reinforced plastic) as flooring for a coop. The only FRP I can find is wall and ceiling panels. Is there another kind that is made for floors? Can it be used in a walk-in coop? I'm confused about what to put on top of my plywood floors. I think vinyl would be too slippery and I have concerns about the safety of the rubberized roofing stuff that people have discussed on the forum. Thanks!