i realize my last post was a bit short in details, the house I was reffering to is in Ship Harbour, Nova Scotia.
This house, built by Kim Thompson, was the first code-approved load-bearing straw bale building in Canada.
I'll give a quote about the moisture in the straw walls of this house from the book 'Straw Bale Building', written by Chris Magwood and Peter Mack
"There are no vapour barriers in our walls. We have built many other strawbale structures over the last five years and continue to advocate this policy. We have been monitoring the Ship Harbour walls for relative humidity and moisture content for four years , whith research assistance from NRC and CMHC. The results have been very positive, most recently MC measured only 9-11%.".......
Hopefully this is helpful info?