One of our barns had sheet metal roof. We had a bad hail storm one day and I took a run out to the barn, the noise was horrible and the goats that were in that barn were in a panic. Those that made it to the other barn were not bothered at all....the only good thing about hail storms is they don’t last long, but the noise was so loud you couldn’t hear yourself talk....golf ball size hail. Wish I could send some pictures of my goats but don’t know how and didn’t know how to tranfer them to my new computer....bummer