I'm still working on finishing my coop. It is 8 x 6 with 8 foot walls. I have just installed 6 shed sized windows that open and are screened. I have the insulation in and stapled to the studs. My next step after the electrician finishes hooking up the shed/coop is that I have to put the inside walls up. However, I am not sure what to use as a material for interior walls for the coop. I would like something that is easy to clean, however, I think with the insulation in, the walls need to be breathable, correct? An one will have to be concerned about moisture inside the walls, correct? I heard of one person using shower board. I heard it is expensive and I went to Home Depot to check out prices, only I could not find shower board. (I don't know what it looks like.) I checked out a few other options while at Home Depot, but I am not liking either the price or the materials. My father suggested homasote board... but I think this could be 'peckable' by the chickens, and I'm not too sure about mold and such growing in or around it. It just doesn't seem like a good idea. . I was thinking about going with a white plastic bumpy walling that I've seen used both in my aunt's double wide trailer and also a cat shelter I worked for. The cat shelter used this so that the rooms would be easy to clean and disinfect. I like this idea, but it seems so... clinical... and not home-y. I would think cleaning this would be easy, however, I'm not too charmed at the idea of using plastic. It doesn't breathe. I would prefer wood. I am also hoping that whatever I use would be a thin material... not over a half inch thick so as to save space for my chickens. Perhaps I am missing out on some viable solution to my quandry, I don't know. I'm not very knowledgeable when it comes to construction. What would you use as a material for the interior walls of your chicken coop? Anyone have experience with shower board for chicken coops? Would wood be a better choice to promote health for chickens? I'm just not sold on plastic, but I want something easy to clean too. Hopefully, price would be not expensive too. I will need about six 8' x 4' boards to finish the job. Any suggestions?