21
Installation
50
2x12.5 / 1x25 mm
5. Build the drywall and foresee horizontal and vertical studs
around the opening.
400 mm
≥150 kg/m³
≥150 kg/m³
≥ 40 kg/m³
≤60%
6. Mount the dampers in the opening.
Apply rigid stone wool panels (150 kg/m³) to a depth of
400 mm (150 mm on each side of the wall) to seal the opening
at the side with minimal distances.
This sealing is applied over the whole width/height of the
damper(s).
When the damper is installed at a distance of 25 mm from a
floor/ceiling, the rigid high-density stone wool panels may be
replaced with standard 40 kg/m³ stone wool (e.g. Rockfit 431),
compressed by at least 40%.
Plaster
7. Seal the rest of the opening (50 mm) with standard gypsum
across the entire wall thickness.
5
6
7
