hmmmm. It has been a while since I posted.
There are pictures in my profile, not sure how to transfer.
The metal strip is just like a piece of molding or weather dripping, that slants slightly toward the ground.
The best thing we did when we built our coop was to make the doors and windows "modular". The entire window and the panel between window and floor pop out.
So when it is time to clean out the coop, we just pull a wheelbarrow up to the open frame, shovel it out, and then clean and hose it right...