[Cob] soil cement foundation

[JUDITH WILLIAMS]

Sounds like we are at about the same stage of construction. Ordinarily I 
would be frustrated at the slow progress (of digging) but in this case I 
really appreciate the time to consider all the options as I work. Here is 
what I have almost certainly settled on for the stem wall over the rubble 
trench foundation. I will go with earthbags filled with a mixture of soil, 
large  pumice, and lime. This eliminates the need for any forms and is 
something I can do without assistance. The only concern is that the filled 
bags will be too heavy to handle but I'm sure I could get innovative about 
that. Earthbag Construction by Hunter and  Kiffmeyer is very helpful on a 
lot of subjects. I have sent for a sample bag from a manufacturer but have 
not checked my mail in ages so..... But that's it. I went last night and got 
perforated pipe for drainage in the bottom of the trench and will be out 
there again today doing whatever needs to be done.