Hi J,

I don't believe it as critical, as traditionally it was whatever they had. The "lite clay straw," and "lite clay chip," slip from methods probably achieve a higher R factor, but it is all relative.

I would not plaster the walls, if that is what you are asking till they are completely dry. If that is not an option then, plaster the inside first, (assuming you have good overhanging eaves.) You could just create a nice traditional rain screen wall outside and cover with boards not plaster.

Good Luck,