Mine are two inches from the roof and the wall inside and then those gaps are 2 feet long but only down the sides so that's 8 feet on each long wall not the two 4 foot end wall I wouldn't do it the whole way around I don't know if it will cause draft though
The top pic is what mine looks like just mine is tighter so nothing can get in so I don't need the hardware cloth or anything and those things are like two feet long and about 2 inches tall so they let in a lot of ventilation
Mine are right next to the Windows but I close them at night so nothing can reach through the chicken wire and kill them but I would go with 10 inches on both sides but I'm not understanding what u are saying about the cutting holes in the boards
Well u can use sand and a cat pooper scooper people say it don't smell or anything lots of people say it is a lot easier so that's what I am using just got some sand out o fire stream a couple of days ago and it's starting to dry so i will let u know how it works or turns out if u want or want...
http://www.the-chicken-chick.com/2012/07/coop-training-chickens.html
See where it says coop training method the roost pic right under neath that could u do something like that thats how my roosts are and my birds love them much better than the one board
Yes it should be good enough of a Selentsealent stuff to keep it from rotting and protected from the elements could u do a roost like this instead of having half way across the coop
I would use the rubber roofing for the floor so its not harmful to the birds and for the poop boards I would say to go about 6 inches from ur roost board so to ensure that there butts don't hang over the ledge of the poop board and to keep the poo on the board and for were ur nest boxes are to...