Here is the latest greenhouse project that I just finished. The concrete slab is insulated so that it will help store heat as will the 40 feet of 1 foot pipe full of water and the brick wall.He will also use it to grow starts for his garden. I have built one for myself of a differant design and it has been green for 2 years unheated in the mountains of utah (7,000 plus feet alt).Mine is not near as pretty but is about the same size and I use plastic 55 gal. barrels full of water as heat storage
