Try to use pressure-treated 2x4s, because the wood will rot faster in the greenhouse environment. Plastic on both sides will speed up the rotting also. I have used both regular plastic from Lowe's/menards/homedepot and greenhouse plastic. The greenhouse plastic is more expensive, but lasts longer. If you can afford the greenhouse plastic, get it versus the cheap stuff. If you can't go the greenhouse plastic, at least use the 6 mil plastic instead of the 4 mil. Marla

It looks as though your panic attack has subsided. Good. I have had the 6x8 for some years now (I think four?) and still enjoy it. Would love to move up to the 8x10 but not sure if there's room for it. So, lucky you! I'm 5'7" and placed mine on a foundation of 2x10's for a little extra height; there is room to work without stooping and I don't mind having to step over the threshhold. My greenhouse is in a somewhat protected spot, with a large white oak to the west, a fence and naturalized area to the north and garden shed to the east, but I've not had any problems with wind. It is neither tied down, with minimal anchoring at the corners. We did, however, run two protective layers around the perimeter inside - under the gravel and up along the foundation: first a layer of hardware cloth to exclude burrowing animals that may wish to overwinter there, and then a layer of Reflectix insulation to exclude drafts. A couple of years ago I swept the gravel off to the sides and set a gray paver walkway down the middle (I'm an incorrigible barefoot gardener). There are several options for shelves. Someone posted photos of shelves secured to center posts at each end. Very nice. Mine are white cedar on the cheap: a local manufacturer/retailer/installer of fencing materials sells their picket fencing seconds for $10/3'x8' section. Cut off the pickets ends outside the two horizontal rails, and we had a bench top just the right size. Our winters are probably a little warmer here in coastal NJ than your RI winters, but I use the GH all winter. We put on its winter coat, a clear solar pool cover, in early November, and the 1" foam insulation panel on the north wall stays up year 'round. The insulation panels on the north 1/3 of the east and west walls, like the strip of Reflectix insulation on the lower part of the north roof, come down in spring. I overwinter tender perennials, grow some veggies and herbs through the winter, rotate house plants through for R&R, have a few orchids, start forced bulbs, start other rhizomes/bulbs/tubers for spring planting outside, and grow some seedlings - most are wintersown, but the tomatoes have to be started inside because I just can't wait for that first fresh, home-grown Jersey tomato! My husband enjoys the greenhouse, too ... no, he's not a gardener, he just likes to sit out there and read, lol. Not a bad idea to leave room for a chair while you're planning your space. That greenhouse will be arriving soon ... good luck and enjoy! (And please keep us posted.)

Marcie, your question came at a very fortuetous time.. I just today finished installing screens on my Clearspan Prostar 12x24 Ghouse. I too was baffled on how to do so until I visited my local LOWE"S store. They have this porch creening "system" that I found fits the bill just fine. it is a plastic "profile" about inch and a half wide with two channels to hold the screening and the spline. The instructions in the link below shows an installer using wood screws to attattch to a porch BUT I had very good luck using selftapping sheet metal screws (#10-3/4") to attach the system to the aluminum frame of my intake vent( which is aluminum ) the system also includes cap strips of assorted colors to cover the screws. System also works best with the .175 inch screen spline. Here is a link that might be useful: porch screening how to at Lowes

safaribabe: I didn't do a huge amount of research, but did enough to know that there's a lot of help out there, both in improvements and "gotchas" notification. I have built two hoophouses, and realized that I wanted something that would shed snow better and be better insulated. After some preliminary pricing of the HFGH I think it would have cost me almost as much in material to do a wood frame with the twinwall covering. BTW, on my coupon, there is a place to invite a friend to be placed on the HF preferred customer list to receive emails. If you haven't gotten signed up, send me your email and I will enter it. I get one or two email ads per week with items on sale, and a 15 or 20% coupon every 6 wks to 2 months. Ray