Earthbag wall in Greenhouse (humid climate)

May 23, 2021 12:45:26

I like the idea of using Earthbag as the main wall in my Greenhouse design, not only for the ability to use existing materials, but also the benefit of a thermal battery wall.

BUT... what precautions must I take to protect from moisture?

Check out my drawing here. The red line indicates ground level, my floor will be about 16 inches below grade, and the earthbag wall would be 8 ft high from the lowest point, with its base against the grade there.

Questions this raised:

Do I need to wrap the bottom couple feet here in poly film? (the base, first few rows of earthbags)?

Do I need poly all the way up that inner wall, complete vapor barrier between humid greenhouse, and earthbag wall?

Another point of interest here is my choice of insulation. I'm using straw bales against the earthbag wall. And in fact, it has it's own set of challenges of moisture protection which I am still working on.

May 25, 2021 18:16:36

One way to prevent moisture wrecking the earthbag wall would be in include either lime or cement in the mix inside the earthbags.

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