Your coop is beautiful! I can see why you would not want to cover it up with a tarp all winter.

Eager to see how your project comes out, so please post updates when you’re done! I’m with you on trying to avoid “one season” materials. I used some clear shower curtains and cheap tarps for part of my run last year and they were in such bad shape, there was no reusing them, which made me sad to have the waste. This year I made wood frames and stapled heavy duty marine vinyl to them, so hopefully they last at least a few winters.