I started off with cheap wood and plastic constructions too Bill,but that was ok while i building a more substantial greenhouse,the fact i have the smaller tunnelhouse now means i'm not in to much a hurry to finish the much larger green house i'm working on now,if it takes a few more years so be it.
Interesting, i wonder if its a single layer or double insulated clear roof,i like how he's dug out the 2.5m pit and filled with rocks which works on a similar bases to how ive done mine,though i notice that his gets far hotter in summer than what mine does,that maybe because ive used a lot more rock in helping stabilizing the temps more.
Post by calmingmychaos on Feb 9, 2014 8:43:50 GMT -5
I built a sunken greenhouse last year as an experiment. At the time I was basically experimenting to see how well it would work. I have a couple pictures of the greenhouse on my blog. www.calmingmychaos.com/blog/sunken-greenhouse-experiment/ Thank you for this forum, as I never considered a "cold-sink". I don't think it would have helped me too much with this experiment, but when I am able to get the equipment to dig deeper, I will definitely utilize one.
Post by flowerweaver on Feb 9, 2014 11:23:28 GMT -5
It seems most greenhouse designs are for northern climates to grow vegetables inside in the winter. I live in the southwest where I can grow all the winter produce I want outside. I just use a small greenhouse to start spring transplants and overwinter potted plants.
What I need is a large greenhouse where I can permanently grow tropical fruit--which does fine outside about an hour south and 1,000 ft lower--and not have it burn to a crisp in the summertime. I like the idea of sinking it partially into the ground for insulation although digging through rocky soil would be tough. Unfortunately the only hillsides I have are creek banks subject to flooding and heavily shaded by oaks. May have to go with a PV powered swamp cooler.
Drip irrigated gardening in the arid southwest on a beautiful pile of alluvial rocks where the hill country meets the desert. It's a food desert, too: a 3 hour round trip to the grocery store.
As part of trying to improve the heat retention during winter of my tunnelhouse i firstly concreted up the window on the south end (shaded end),i then used the left over rubble from the construction of the second glasshouse to back full this wall and cover with a layer of soil which is now coming away in self sown grass,the inside of this wall should keep warmer from now on
Last Edit: Feb 14, 2014 17:31:56 GMT -5 by richardw