Jointing in K20-0 staircase
In the K20 staircase, we removed some gypsum cardboard and since then regularly have sand coming out of the wall.
I had talks to at least Björn and Janina already, both liked the idea of just jointing the wall properly again.
It could be done with material we have here: 3 Parts of sand with 1 part lime and ~0.5 parts water.
Could be a side-task as it can be done in multiple steps whenever people are willing to. Clean and wet the wall (thoroughly) before applying!