I just had the interior of my coop remodeled. Here's how it looks now.
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Actually, this was still a work in progress. The poop trays are 16" from front to back and in the final phase all the roosts are 3" above the poop trays, like the one at the back. We lowered the one on the left. The nests are 12" high on the inside but I still need to install a "running board" in front of the nests to make it easier for the birds to access the nests. That will happen this Sunday. I use a slotted spoon type tool for cleaning the trays each morning. The trays contain a mixture of construction sand and Stable Fresh because the feed store was out of PDZ. We use shredded paper on the floor and in the nests; there is much more on the floor now than what you see here. Once we get a good base of shredded paper, we clean it out about once a year.