This is a view of the west wall of the fly pen. Craig added some corrugated siding that a friend gave him to keep the weather out of the top part of the loft. There is also corrugated siding on the roof area over the fly pen. It was a nice building material because it does its job of keeping out the weather, but it also lets a lot of light into the loft. On this back side of the loft he used some smaller scrap pieces and joined them together with rivots.