Cob: RE: Domes ...

[Raduazo at aol.com]

    It is possible to make earth domes using synthetic bags filled with earth 
and tamped into dome shape.  I think the bags are then coated with cement.  
Whether this is safe or not is open to question.  Cement tends to trap 
moisture in the earth of cob and adobe.  I assume it would also trap moisture 
in these earth filled bags.  Whether these bags will accumulate enough 
moisture to cause catastrophic failure? That is the question.
Ed