Also,
Just so folks understand, this coop/run is an open air coop/run with a roof over it. It was part of a shed overhang that used to be a dog kennel, so it has a gable shingled roof. The walls of my coop/run are treated 2"x4"x6' walls with hardware cloth, and I made panels that are wire covered as well that form a wire covered roof...all covered by the shingled overhang. So, my birds have wire protection overhead as well.
We just put in the nesting boxes the other day in anticipation of eggs soon. Those boxes are 16" off of the ground. My roosting bar is actually lower for the time being, and I plan to move it higher soon. However, the birds only use it during the day and they've actually been sleeping on the run floor, which is concrete covered with pine shavings. My coop/run is 11'x11'x6.5'...at the moment. It is looking like I am going to have to build them a box...as a place to sleep...within the coop/run to try and get them off of the floor.
Part of this run has a 2'x4' dog box that I left in the coop/run that is almost 20" off of the floor. Every night all 17 birds gather closely together under that 2'x4' area because their head is covered. I know it's not for warmth, because when it was 80 degrees out they went there as well. So, I thought I'd build them a small sleeping coop within the coop/run and elevate it to the top of the 6' walls...making it 3'Dx6'Lx'3'H and approximately 2ft. plus off of the floor. I'll give them a ramp to get in...and hopefully they'll begin to use it before it gets too cold.
We just completely covered 2 walls with plastic with a 2ft.sq. area I can roll up for ventilation. The entire south wall and roof are open. So that will give them protection from the wind while allowing plenty of ventilation.
One question I have is: Should I attach my nesting boxes to the sleeping quarters/coop within a coop...LOL..., or can I leave the nesting boxes along the block wall...several feet away from their where I plan to build their sleeping quarters? I have no idea what time of day the chickens will lay their eggs...I assume early morning perhaps?