Let me start by saying I am trying to build my coop mainly with materials I already have stock piled. It is will be 4 x8 with 6 foot side walls, a salt box roof and exterior nest boxes. I have a 50" x 63" Pella triple casement window that I want to put in the south wall. Will that be too much window for the coop? Summer sun will not be a problem as I have a 9 foot grape and blackberry arbor situated to shade it in the summer but with let the sun in for winter. It will also have a 20" x 30" double hung on the west side that is shaded year round. There will be eve vents and an operable copula that can be closed in the winter if needed.