Hi Rick,
So glad to have you here and on Cubits too. Please stick with us on both sites, we discuss different things on each.
As far as any greenhouse questions go, Irises probably won't be the place to get answers. I would try one of the forums. I did search for greenhouse and here's what I came up with
http://garden.org/search/index...
I would even imagine our fearless leader, Dave, would have knowledge of greenhouse constructions.
So, you might want to look in some of the other forums for greenhouse info, but please stick here with us on irises!
Happy New Years to you, and glad you found us.