I looked through my Sobon books again last night and he does suggest dry laid foundations if you have the ambition. However he does point out that there may be a building code catch. I am taking a workshop with him next week at Hancock Shaker Village and will discuss the building code issue with him if I get the chance. I know he has built several buildings in my this area that were on dry laid foundations, so I think it may not be all that far fetched.
