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tadbits posted on r/backyardchickens2w
It’s been a constant learning curve for us lol. I swear chickens are less backyard pets and more of an ongoing engineering project. It's been years of trial and error, but I hope some of what I could share is useful to you in KY. this is what we used as a radiant barrier. It’s installed between thin plywood and the PVC roof panels. Because the PVC is corrugated there’s still natural air space created by the ridges rather than a fully flat contact. That little bit of air gap still lets the barrier reflect heat, which is what you need for it to work effectively. Combine that with your exhaust fan, and your girls are likely to be way more comfortable in the heat.