Could we use a raft slab with ICF walls on a sloped site?

Paul Fischer
Updated: Sept. 17, 2020

We are thinking of building an earth-bermed home cut into a hill (think modified Earthship) in west-central Alberta. Because of the sloping grade, footers below frost would require a number of different depths to stay 4+ feet below grade. I would use ICFs in lieu of the tires that Mike Renolds advocates, as I am 73 yrs old and stacking and filling hundreds of used tires is WAY beyond my capabilities. I guess what I'm asking is, would a raft slab tend to float away from the uphill side?

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