The control room is already isolated with double doors, multiple layers of glass for the window and double (stone)walls.
The former machineroom does have double walls, but just one door on each side. So we are going to add an extra door where you go to the controlroom. And we are adding an extra (absorbtion) wall near the other door (to the hallway).
Good friend Ronnie working his a$$ of;
Bring in nice floor:
Three layers of rockwool:
