You're right, the roost is too low and we knew it was when we put it up. But it's just screwed in that spot temporarily because we weren't sure they'd use it yet as high as it will finally be. It will be moved up as soon as we know they're using it. I plan on having a poop board under it, and it made more sense to only have to install that once, after the roost is in its final position. We assumed that for the first few days they are outside, and with the weather being so doggone cold yet, they'd be more likely to huddle together in the litter than use the roost at night anyway. We can move it up anytime, then install the poop board. The pop door height was a suggestion from the deep litter forum where they talked about having it elevated above the level of the litter at it's deepest. He just got it a little too high. <sigh> When I saw how high off the ground he had it framed, I just bit my tongue. He was so tired and cold I didn't have the heart to ask him to do it over and figured I would just find a way to make it work. It's all about compromise sometimes, ain't it? Teehee
I'd wanted another window all along. Ken said we didn't need another one, but I just now had him read your post and he's agreed that you're right. (Bless you - we've argued about that second window for days!) Our strongest blizzard winds come from the north and northwest - the huge expanse of wall you were talking about - and they'll slam into that north side especially hard and drive every snowflake through any crevice there like a fleet of Mac trucks. It's not unusual to have 4 inch snow drifts inside the garage from wind driving it in under the door, which also faces north. I can see the benefit in a huge wire covered hole on that side, but we'll really need the ventilation in the winter as well, when they are spending more time inside, and that's the time I worry about - finding that balance between good ventilation and dangerous winds howling through. I suppose we could block it off in winter, but then that kind of defeats the purpose.
Could we maybe put a second window on the west wall - the wall where the roost runs across now, and then move the roost across the solid north wall, without any opening there for winds to come through? You can see how thick the lilacs will be to the west, so there would be plenty of shade against the hot late afternoon sun. The vent we bought to install is 24"x24". It's going on the highest point of the east wall - at the top between the pop door and the people door. So the west window would be directly facing and lower than the new vent, which should create cross ventilation. We'd leave the window open or partially open most of the time, closing it only on the worst days. Do you think that would work? We also drilled 2.5 inch holes every few inches into the soffit, covered with screening to keep out nasties and prevent wild birds from deciding to set up house. We hadn't done that yet in these pictures.
I can't even begin to tell you how much I appreciate your help!
He built me a coop/run, even hired somebody to help him. I still don't know the total cost because he wouldn't even let me pay for it all - and he doesn't even like chickens. I couldn't even help because my knee was too messed up at the time. God did send me a good one too. I love him and he is a blessing to me. 
