I have 2 areas that I could possible place my coop . I plan on having 3-5 brahma . 1. would be out in the yard 50 or more feet away from the house . It is a treed area which will be mostly shaded , a little sun breaks through the branches and leaves . I would have to roof the run since we have hawks and owls in the area . 2. under my deck which is attached to the house . I have 2 walls of the house that create an "L" shape , the deck is a rectangle which covers this area . There is a set of stairs leading down to the ground . This area would be totally roofed with the deck , I already have poles to attach the hardware cloth and I could even build the coop in the area under the stairs ( which is on the end of the deck and open to the air / yard). They would also have a larger run than if I put it in the yard . What I worry about is if there is enough ventilation if I put the run under the deck and the coop under the stairs . Would it really make a difference in the ventilation of the coop & run if 2 sides of the run are cement walls ( house foundation) ? I know it would help in the winter but I worry about less air flow in the summer .