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My Greenhouse: a warning to those who still wish for one...
I vote for: you're older. Hire some high school students to finish at
least the digging for you - be done in a couple days and they work cheap. I just built my GH last summer and it almost killed me. But you have the right idea about the insulation. I put the insulation panels all the way down to the frostline, 32", when I built mine. They come even with the top edge of the block foundation, 8" above grade, and are capped by the oversize sillplate which covers them and the block. This entire mess is then faced with a panel of vinyl siding capped with flashing to give a nice finished look, protect the insulation from damage, and to allow the rain to run down over and outside the whole assembly. This keeps the foundation from sucking out all the heat from the GH. I did not insulate beneath the gravel floor as I only heat to 55 degrees in the winter. Thats's all they get. Usually our winters are clear enough that most days it gets into the upper 60's in the GH. I turn the thermostat up to 70 on watering day and the day after. With the triplewall glazing, the foundation insulation, and being attached, it's much more affordable to heat, which was indeed the plan. |
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