I agree with @Auntiejessi3, 1/2" 19-gauge hardware cloth is a much better choice than window screen. My roosts are about desk height, so about 30". I have Brahmas and a large White Rock and I personally wouldn't go any higher than that. Untreated spruce/pine/fir 2x4 studs installed wide side up work great for roosts.Ok, good to know. I'm writing some notes down here. Could they be covered with mesh screening or is hardware cloth better?
Also what do you think for roosts? I'm guessing I wouldn't want them real high. I have some brahmas and other heavier breeds. Just a flat 2x4? Untreated?