I'm a research nut, so before we built the coop, I crossed referenced problems with coops from every aspect conceivable. We don't put any water or food in the coop except for harsh weather conditions (like 7-degree temps). We used decking, then coated it twice with a food grade sealant, then glued and screwed down white plastic wall panels. We also used the white plastic wall panels on the wall behind the roosting poles. We use one bag of fine hemp mixed with potting soil for the floor to prevent slippage, provides additional insulation on cold days, soft landing for chickens, incredible moisture and odor control too. Takes only about 1 minute to mix the bedding which could go without doing that, but I just like to keep tabs on everything in the coop. It stays extremely fresh and light, so I don't have to replace maybe once to twice a year depending on what our garden needs.