Casting lime hemp plaster on an internal wall. 

In this video you can see the process of casting lime hemp plaster on an internal stone wall.
The lime hemp was cast in stages to a thickness of 80mm.
This created a nice surface for the old stone wall and at the same time added insulation material to the wall that had the benefits of being a breathing product that's rodent resistance and fire proof, it also created a healthy atmosphere for the living space.