Gonna have to figure out a new system for covering the pens. I've had it. They just ain't lasting anymore. They changed the material, it's a softer more flexible texture and tears way too easily. I'll be searching for new ideas.
Dome or round pens? I used rolled rock roofing and it tears after awhile, used landscape cloth OK but rain leaks and black, seen allot of people use house wrap, I worked for a sign company and took home all the banner material they where going to toss and allot of big signs are made from a real durable banner material and it can't be reused, that stuff is the best. I've used it as roofs stretched over brood pens.