My chickens' coop is a fence built around an old aluminum shed. It has been insulated with plastic and they had an old wooden baby gate they would roost on. However, since we added EEs to the flock, they've decided they weren't roosting high enough off of the ground, and now everyone is roosting in the rafters that are part of the shed. Problem is... the rafters are aluminum and winter is upon us. Any ideas of what I can cover the aluminum with? I thought first of the foam you wrap around pipes indoors but quickly realized they would probably peck at it and ingest it.