High density cellulose is sprayed in lightly wetted, in a mist. Part of its better insulating value is air does not pass through it easily. There are still air chamber in it.

I am waiting for spring to continue my clay work. I am going to be focusing on wood chips and light clay. Maybe some work with swale grass, for it grows locally, this won't be in bale form but mixed with a clay slip and various ways of infilling. One of interest is wrapping the grass on sticks which are wedged into a bay this is then covered with a clay plaster or render.

Tim