I was thinking about building an earthbag home, but the area I want to build on is very sandy. I don't think a rubble trench foundation would work for my location and I'm almost positive the city inspectors would not allow it. I talked to a couple builder friends about it and one said that nothing short of a 10 ft deep slab of concrete would be acceptable, the other said that a layer of rubble covered by a rebar mesh and then concrete might work.
Do you guys have any ideas or experience on what I can do for a foundation in this sandy soil?