Two schools of thought in my mind.... stationary or mobile coop. Each has it's own perks and drawbacks. See my profile photo for my idea of an ideal stationary coop: 8x8x6 to the bottom of the rafters, interior laying/brooding boxes, and a gradually ascending perch system allowing the birds acess to four (of six) central rafters. Salvaged windows screened with hardware cloth, anr because I live in zone 3 where frostbite is a worry, pink foam insulation under the roof protected from picking by 1/4" plywood (luon). Floor is salvaged 2-by, built solid, on top of three treated 4x4's, and I utilized the deep-bedding method for insulation in winter. Coop sits atop seven cinder blocks (wish it was nine) which prevents critters underneath, as well as providing an outdoor shelter for the birds from rain and snow, and year-round access to soil. The exterior is locally milled siding boards, overlapped 3"... they taper from 3/4" down to 1/4".
That was then, when I lived in the woods and could get away with free ranging. Now, I live on a farm-corner lot, with pissy neighbors and lots of traffic. My coop is constructed from 1x2's with an attached run, with a pair of
tractor supply wagon wheels on a 5/8's inch all-thread axle under the coop section. Allows for the pasture-fed, dark orange yolks we love, while roping the chickens into mowing the lawn. Drawback is I can only house maybe 8-12 chickens, where my stationary coop started with fifty birds.
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