There is a big difference between sawdust and wood shavings.
I am not talking about large shavings that come for example from traditional hand plane. I am talking about the shavings that came out from the large machine planer.
I have collected shavings that I will use from my friend-carpenter that makes pine wood windows and doors.
The shavings insulate much more better cause there are much more air between the shavings (compare to the sawdust) when they get lightly compressed and infilled in the wall. The clay proportion I am talking about is dry clay as a powder that is being mixed with the shavings. The clay is mostly added to prevent fungus attack - so the mouse do not like to make a home where the clay is.
