Cob Additions

[Jacob Stevens]

Excuse my ignorance if this is a dumb question, but I'm still not too well
versed in cob-know-how yet.  

How would cob buildings be for adding additions over time?  Are there issues
of drying and settling that would make it especially difficult to do so?
How would new cob do at sealing against 1-3 year old cob?  Any
thoughts/ideas on this?

Thanks in advance!
Jacob Stevens
Fiddler's Green Community
jasper at nwu.edu                          
Northwestern University Library         
On the Western Coast of Lake Michigan          
http://pubweb.acns.nwu.edu/~jas923