Hi folks. I'd like some suggestions regarding how much room hens need to flap about. The clearance required above the top roost to roof underside? which I think I'll line with polystyrene refrigerator box packing sheets or foam ceiling tiles and a corflute ceiling liner if I think it's necessary. Would they peck polystyrene apart if they could reach it? Somehow I think they might. The flapping clearance required above a kitty litter tray (unless I get a better suggestion, perhaps a large terracotta pot-plant drainage tray)full of dirt appropriate for a dirt bath? How wide and deep should a dirt bath tray be? How much general headroom do they feel comfortable with when walking under the coop to their feed/water/dirt-bath area? I think I'll be getting An Australorp, a Buff Orpington, and a ISA Brown. How tall do they generally stand? and how high can they reach if they try? I think I should replace the tinted glass lift-up door with corflute. It's lighter and would probably let in less heat than glass. What do you think? I'm going to go to a car wrecking yard and see if I can find one of those little spinning ventilators that you sometimes see on old delivery vans or on canopies for the top of the canopy above the coop's centre. Would they dislike a floor under the roosts and the rest of the coop floor of chromed supermarket welded wire mesh shelves? 1/4" thick wire, 3/4" x 3" spaces? I'll put a slide out sheet of coreflute or ply under it as a manure catcher. If that is an inappropriate floor please give suggestions. I saw one that looked like someone had re-tasked old timber blinds placed on edge spaced 1" to 1-1/2" apart? It looked like it might be odd to walk on but I'm new to this so fill me with chooky wisdom. Remembering I'm in a very warm climate so there wont be a problem with cold feet, give me your suggestions regarding what is the most comfortable roost size. 2"x2" corners rounded slightly? 2" x 1" horizontal rounded? or tree branches? So. there's a few questions for you.