Hi All, Thanks for your response. Cactusfreak - where did you purchase your pool cover? I have been planning on getting one of those eventually. When I bought the greenhouse I thought it was much more insulated and a lot of people (including the distributor), told me it would be more than warm enough with two oil radiators. It sounded like I would need more heat than that, but I thought it would work out. I think what I will do for this winter is insulate the greenhouse like crazy, get a good heating system and hope for the best. I'll have to look up Pittsburgh's weather records as well for the winter. If it doesn't work I'll just use it as a cold frame. I will be growing a bunch of orchids in the greenhouse and a handful of 'annuals' including Fushia, hibiscus, mandavilla and more. Some of the orchids are probably the most sensitive to the cold.

Billala, the doors are not flush with the wall, they do not sit inside of the door opening. They are actually outside of the GH. The weather stripping takes care of the sealing. Although if you want the doors to swing 180 degs, the front surface of the door end of the GH must be flush with the vertical surface of your foundation. John Here is a link that might be useful: Johns Journal

Very nice indeed Jeff. Congratulations on such a nice job. Yes there are gaps, and they provide lots of little foam for filling, but I do know what you mean about for that much $. I did some caulking with some clear silicon & even caulked around the bottom of mine with some filler, so water couldn't come in from outside & sit under the frame during freezing weather. Still so far I have had not one problem with mine to date & this will be my second winter in zone 5 with my professional GH. After I did get mine set up I realized that I was probably now an expert in assembling it... To bad I wouldn't have to worry about doing so again (least I hope not, LOL). Some day if I do, I doubt that I will have 1/2 the trouble at least. : ) Best of luck with yours, Rose

Hi! I have a Rion but I can't suggest anything concerning the doors without seeing a pic of them. Mine seal OK except for along one bottom corner. We left that for some fresh air. When it gets into the teens at night I'll stuff some of the crappy insulation Rion provides in the opening. Another place air comes right in is where the roof rafters meet the wall uprights. It's a poor design so Rion supplies cheap thick gray insulation to stuff there. Also along the roof where the caps go is far from a seal. In fact the caps were so loose we "glued" them on with silicone. I lined the north wall and side walls with Bubble-Wrap from a local packaging Co. Don't order from Charlies as he's several times the price and it's the SAME stuff. Here you can see the bubble-wrap attached with self tapping screws and fender washers. A closer look at the north wall and two spiking orchids that refused to bloom in the sunroom.