thanks Tim, yes my concern was with the light clay wall not being able to breathe both ways because of the polyiso. My next choice is cellulose and earth plaster interior.
The 1' thermal wall is an interior wall, dividing main living room and bedroom area of the house (khaki colored wall in the pic below).
I've gone from using granite stone, water filled pvc storage tubes to finally settling on clay/shavings/straw filled wall....joys of organic building
