about 3” around the top on one side. You wouldn’t believe the temp difference it makes! Most of my birds decided to molt in the dead of winter last year. So I wrapped that coops run. Usually I don’t bother too much since they are big birds.Awesome to get some input from someone else who keeps chickens in our crazy weather!
You suggest wrapping the entire run, but leave the top part open? I've seen some people do that around here, and I guess that'd help keep snow/chilly wind out too!