Key advantages
- Very high sound absorption across a wide frequency range
- Significantly reduces sound transmission between spaces
- Suitable for especially demanding acoustic requirements
- Fire-resistant – non-combustible (Class A1)
- Withstands temperatures above 1000°C
- High stability – does not settle over time
- Moisture-resistant and does not crumble
Why this product
Stone wool with a density of 120 kg/m³ is designed for projects that demand maximum acoustic performance, such as studios, equipment rooms, public buildings or noise-sensitive areas.
The high density improves low-frequency absorption and the stability of the material within plasterboard systems, making it suitable for advanced acoustic systems.
Technical description
ROCKWOOL stone wool is made from natural basalt rock that is melted at high temperatures and processed into mineral fibres with an open fibrous structure.
This structure provides:
- Sound energy absorption
- Reduced sound transmission between spaces
- Improved reverberation time (RT) in the room
A density of 120 kg/m³ provides:
- High airflow resistivity
- Improved low-frequency absorption
- High mechanical stability within assemblies
The material acts mainly as a sound absorber, and combined with double plasterboard systems it can improve the STC performance of the wall.
In addition, the material is non-combustible (Class A1) and has a melting point above 1000°C, making it a combined acoustic and fire-safety solution.
Applications
- Advanced plasterboard walls
- Studios and music rooms
- Meeting rooms and offices
- Hotels and public buildings
- Hospitals and educational institutions
- Complex acoustic systems
- Industrial buildings
Technical specifications
- Material type: stone wool (rock wool)
- Density: 120 kg/m³
- Thickness: 50 mm (5 cm)
- Noise Reduction Coefficient (NRC): up to ~1.0
- Thermal conductivity: ~0.034 W/(m·K)
- Fire classification: A1 – non-combustible
- Melting point: above 1000°C
- Water absorption: very low
- Water vapour absorption: <0.04%
- Standards: EN ISO 354 / ASTM C423 / EN 13501-1
Installation
- Cut to size and insert between the plasterboard framing profiles
- Friction-fit installation (no adhesive)
- Fill the cavity completely for optimal performance
- Suitable for double wall systems and ceilings
Important: a complete, tightly packed installation significantly improves acoustic performance
Manufacturer data
- Manufacturer: ROCKWOOL
- Series: Safe’n’Silent / Industrial
- Material: basalt stone wool
- Intended use: acoustic and thermal insulation, fire protection
- Suitable for: private, public and industrial buildings
Performance table
ROCKWOOL technical specifications
ROCKWOOL stone wool fire classification
ROCKWOOL European fire classification
Standards
EN 13162 | EN 13501-1 (A1) | EN ISO 354 | EN ISO 11654 | EN 12667 | EN 12086 | EN 1609
