Will the area under the floor be accessible to the chickens? If not I would put tin/underpinning around outside of floor to stop air. If chickens will access under floor area-I still don't think I would insulate it
My inital thought was to attach plywood to the under side , and then
just wrap...
NO insulation! You don't need it AT ALL. All it will do is give a nice warm cozy place to for mice to nest, and you will be ripping insulation out in February. Chickens survive cold ALOT better than heat. They have down, then feathers to repel water. They will be hot and uncomfortable in an...