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Earth Bag in Cold Climate

 
pollinator
Posts: 128
Location: Central Maine
17
homeschooling hugelkultur trees
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I am looking into building an earthbag home in the middle/western Maine. My plan was to earthberm/ bury the house underground. My question would be, if doing something like this, how much R-value would I really need? Or should I just not do this for some other reason?
 
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I'm in NB to your east.
With a 36" soil depth, typically I can expect an average soil temp of 59°F.
From 0-3', you get 90%+ of the potential r-value from the soil.
Anything deeper is not necessary: see law of diminishing returns.



 
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