I did a search for interior walls and didn't really come up with what I'm looking for. The question is, Is it worthwhile from a sanitation standpoint to cover the interior walls of the coop? Here is the lowdown. I have some fiberglass insulation laying around, so I could get rid of it by putting it in the walls of my coop. I know it will need to be covered to protect it from curious chickens. Here are the coverage options, 1. Use 1/8" Melamine coated paneling for the inside. $11 a sheet and pretty thin & flimsy, but easily cleaned surface. 2. Use 1/4" flake board. $5 a sheet, stronger but uncoated porous surface. 3. Use the 1/4" flake board @ $5 a sheet and paint it with a semi-gloss enamel to provide a bright and easily cleanable surface. There would be a cost to the paint ranging from $3/gallon at the Habitat for Humanity ReStore to $28 from Menards for a gallon of fresh stuff. Labor is not a concern as I have more time than $$. I really don't want poo encrusted areas between the wall studs, etc. etc.