Honeycomb boards
SWAP Sachsen
Swap Sachsen offers laminated and non-laminated honeycomb boards.
Tip: Already used by set construction: If you have primed the panels on both sides, you can simply paint or wallpaper them without them bending. Thickness from 5mm to 30mm.
Re-board Technology
Re-Board offers honeycomb cardboard panels with fire certification, as well as matching screws and profiles. All FSC certified.