1. The ceiling was covered in Armaflex 13mm.
2. Ridges were covered with  YBS Airtec Double Bubble.
3. Acoustic insulation (recycled plastics) is kept in place with a wooden frame.
4. A plywood plate is covered with an aluminium damp shield and attached to wooden frame.
5. To make a smooth transition towards the wall, we used multiflex (bendable plywood, mind the f).
6. To finish it of we added a layer of wallpaper made out of natural materials.