Hi!
So, we back then
- screwed the panels to the substructure. However, you don’t need self-drilling screws for wood
- filled the joint with Fermacell plaster (no idea if it contains additives)
- sealed the Fermacell/Fermacell connections in the ceiling area with acrylic
- sealed the connections to the masonry with silicone.
Today, I would
- consider using reinforcing tape (some panel joints are visible)
- seal all connection joints on ceilings and walls with silicone (which apparently is now also paintable).
Best regards,
Tomtom.