obdiah

welcome to the forum

2 years back I built a 20x12 greenhouse in the ground I store some banana plants in it to keep till spring but grow most out doors this house has performed well above my exceptions the lowest inside night time temperature recorded last winter was 43 F if I remember right with the outside temperature 8F this is with no heat at all I dug a six ft deep 20x12 trench with the track loader and bermed it up an additional 4 ft on the north side then framed the top with 10 in I beam salvaged from an old mobile home frame with I beam rafters on 34 in centers and glazed with 14 salvaged sliding glass double Paine patio doors beaded on the rafters with rtv silicon total cost was about $800.00 would be easier if you had a steep south facing hillside to build it on also keep an eye on drainage the great part was 0 heating cost all winter