Thanks for the compliment...
The run/coop is set on a concrete pad that the previous home owners installed, probably for a hot tub. We purchase pine shavings (
+$7.50 a bag) and it goes a long way. 1-1/2 bags will cover the area about 4" deep. By the way, do
not use cedar shavings. I was told by the farm store that cedar shavings will harm the chickens and eventually kill them.
Last year I bought cheap garden soil and when I watered the garden the water pooled on top of the dusty soil (I've since stopped being so tight and bought
Miracle Grow soil for the garden). So, when we built the coop I thought about that cheap, dusty soil and that it would be perfect for the girls (Blanch, Molly & Amber) for dust baths and it's proved to be. They bury themselves in it and seem to love it.
I know I have to replace the roof screen with hardware cloth but I'm postponing doing that. To be honest, I'm tired of working on the project and need to focus on other priorities,
e.g. building a deck railing. A motion sensor and alarm will have to suffice for now. I'll replace the screen roof with hardware cloth in the fall, when the racoons here (Oregon) are more active. You are right about racoons though. We watched a show about them on PBS and they can somehow disconnect their vertebrae to bend their bodies and squeeze into very small openings. They're pretty intelligent animals.
As an aside. The coop is insulated and has a recessed heat lamp installed that can be switched on from our kitchen. There is also a wireless thermometer installed so we can read the temperature inside the coop from our living room. Last winter we got down to -20F so I want to make certain the girls are cozy this winter.
Best of luck with your coop renovations and if you have any more questions, please don't hesitate to ask.
Paul