I am going to purchase the Garden Coop plans because they are JUST what I need for my coop (6 hens, one is a bantam) but we're looking to modify the plastic/pergola roof. I like that the corrugated plastic on the top of the pergola-style roof over the Garden Coop keeps the coop and run safe and dry from the weather, and living in a Chicago suburb means that we need strong protection from the cold weather and snow. However, I'm not a fan of the look of the plastic sheet on the top, and I want to be able to grow things on the pergola without having a sheet blocking the plants. I'm having trouble figuring out how to put the plastic sheet below the pergola. Anyone have ideas or have the Garden coop and have chosen a different method of waterproofing/weatherproofing?