I suggest that look into small unheated greenhouse, for under $300. sold by Harbor Freight. Google it and see.

I recently helped a farmer build a large greenhouse and he used clear ploy carbonate for the ends.

seysonn... Not looking for a green house at this time, my raised beds are long ago constructed (2011), and include four 14' tall hops beds... the raised bed complex is 4' wide, 32' long, and 16' high... Harbor freight is not going to help.. LOL

Not only that, but I would not trust their contraption under 4' of snow....

I need to build individual cold frames over each raised bed five of them 2'x4' and one long raised bed 2' x 28'...

Hopefully I can start building a dedicated green house this fall, but more likely next spring or fall... It will be concrete block around the base, and then an arched tunnel of solex on top..

pn brown.. did he use clear for the roof, or was that translucent?...

My cold frame was very simple this year - 10 55 gallon water barrels and 6 bales of hay arranged in a square with the hay at the front and the barrels as the sides and back. This was then covered with a thick plastic sheet. When the temps were in the low 30s my cold frame was never below 55 all night. The 55 gallon barrels cost $10 a piece, the hay was $6 - and I subsequently used it for mulch. It was a low cost, high performance cold frame that has seen 500 plants go through successfully this year. I didn't even have to worry as much about overheating if I was late in venting the frame - all that water mass buffered the heat.