Just remember..chicken wire is to keep chickens IN and is not strong enuf to keep predators OUT. Should be hardware cloth…very strong wire…1/2 “I just wanted to let you know that I have a prefab coop and have never had a predator get in. If you’re planning to free range your flock during the day then I would not be too concerned with it. What my husband and I did was got a large prefab, I think the same dimensions as yours, then built a fence a generous radius around the coop so they can semi-free range. When we are in the yard we open the gates and they get to run free for reals. I live in a mountainous area that has everything from opossum to foxes, bobcats to mountain lions, the occasional lost dog and even bears. Nothing has penetrated our prefab. To secure the run I put this hard plastic chicken wire on the bottom of it, secured by staples. Then I lined the sides with cinder blocks for added security which double as planters for chicken friendly herbs.
I say do your thing girl and just use common sense Polish chickens are so fun by the way, I only have one and she is the sweetest.