Hello and welcome to BYC! Happy to have you join our community. I covered my run with corrugated aluminum with plenty of 2 x 4 supports and slanted so it's easy to remove snow. I expanded my run to stretch out into a sunny area to allow more sunlight into the run during the winter. I used heavy duty, clear PVC with the UV protection. This is also supported well to hold up under the snow load. My chickens love to hang out and take dust baths in that section. During the winter months I cover the sides of the run with heavy duty clear shower curtains to block the wind. This keeps the run and the attached coop warmer than the ambient air temps. It's also easily removed on warmer days. I let them out to run about my backyard everyday, weather permitting. But I'm right there with them due to the high predator population. Best of luck with your new flock.