Dh just finished the run! He put a corrugated steel roof and siding(for summer shade). We finished it off with plastic, so no snow can get through. It's also 100% protected from the bitter wind! We originally were not going to winterize the run since we built our coop much bigger then we needed to. However, I can't imagine them getting along well without this added space! I'm so thrilled hubby did such a great job. Bring on the snow!!!