I'm making the Garden Coop and I am trying to figure out how to attach the roof. Our coop is built on very soft ground (The foundation is secure though, it's only soft on the top part) and we don't have a small ladder, we only have a large 10 foot ladder and a step stool. I am entirely unclear on how to to screw the suntuf panels to the foam spacers which are attached to the purlins with nails. I am wondering if I can use one of those "Liquid Nails" sort of adhesives to attach the panels to the foam? it seems like this would be easier since I can work under the roof, and the main issue is that I can't get on top of the roof. The adhesive says it works with foam and plastic and it's rated for external use and it's waterproof. It seems like this should work?