As I'm researching materials to use for my upcoming greenhouse project, I ran across this thing called Solexx.
http://www.greenhousemegastore...
http://www.solexx.com/index.ht...
It is double wall and it comes in a roll and seems to be fairly inexpensive when compared to traditional polycarbonate sheets. It comes in 3.5mm or 5mm and apparently you just screw the stuff right into the supports of your greenhouse.
Has anyone seen this up close? Any thoughts on it?