I'm hoping to build an earthbag root cellar and I am trying to figure out what the best way to parge the outside would be. I am planning on having about 6' of it underground (with butresses). I also am thinking a french drain at the bottom would be helpful.
In general, I'd be tempted to either wrap the sub-grade part in an epdm liner, or extend the gravel bed for french drain right up the side of the buried portion of the wall to grade. A lot depends on the particulars, though. How's your soil? Do you have enough slope that you can take a french drain from 6' below grade to daylight with relative ease? Can you site the thing out of runoff flow?
Not too sure on the soil yet. I'm planning on going about 3' down below grade and then using fill to berm 3' above grade. I don't have enough slope to drain to daylight. I was thinking about draining to a gravel pit.
I've tried to attach a pic to give an idea.
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