New invention to me at least

[POAJoan]

We have come up with another idea for the greenhouse (85% finished) I have a raised permanent planting bed 36 inches by 15 feet. We use leftover ICF building panels, cut their support off and bolt a ¾ inch exterior plywood to the remaining supports every 18 inches this gives us 2.5 inches of insulation all around the box. We then used the same plywood covered the outside and braced the four corners with simpson's metal braces. It sits on 12 inches of gravel 12 inches under the finish level. The footings wall is made of ICF forms 24 inches tall and they are 2 feet underground. They are filled with 6 inches of concrete. This will keep the outside frost from ever penetrating the planting beds. The other morning it was 5°and the soil temperature 9 inches down stayed the same. Since we are reskinning the hoop house and had a 12X20 piece of solar pool cover I designed the 1/2 inch PVC frame. We then covered it with the solar pool cover zip tying it to the frame. They sit it on the top trim of the beds. The top 4 inches of planting soil only lost 7° overnight. The greenhouse heater keeps it above 35°and under the covers it was a minimum of 48°. They are very portable. Best of all by using my 4 year old pool cover they each costs $4.00 and! It will be fun experimenting with them.
Joan from Reno where we finally got some moisture!