Thank you for this info. These are great things to know and with the dry heat here I'm going to have to use a few of these. Going to start building a small 4 x 4 coop as soon as I find a link with a good complete plan to go from.
How many birds are you planning on keeping in a coop that small??? Remember that water and food (if you keep them there), perches, nesting boxes all take up space, limiting the sq ft available per bird - and while climate will sometimes allow a bit of fudge factor, and big runs will allow a bit of fudge factor, ultimately, too small a hen house will contribute to both behavior problems and ventilation problems, both of which make health problems.
If you haven't got the space, you haven't got the space... But a 4x8 coop is only marginally more expensive than a 4x4 coop, may well require fewer saw cuts, and is a lot more forgiving of "chicken math". Also, this site has some GREAT coop examples, often with good plans. and if you are budget conscious (who isn't right now???) you might want to look into pallet coops, which start about the size you are contemplating...
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