The walls are fine as they are – aren’t they? They certainly could be, but despite the fact this has all taken a long time, it will be fantastic when this is all finally finished!
The traditional covering of a straw wall is not surprisingly the same as the covering of a masonry wall – plaster. The only difference being conventional practise on masonry utilises cement, while a plaster for straw should be breathable. This breathability is the most desirable approach on any solid wall structure that pre-dates damp courses. Indeed the straw walls when plastered and lime washed, being close to two feet thick will actually look very much like the stone walls themselves.