Key advantages
- High density of 120 kg/m³
- Thickness of 75 mm for filling deep cavities in building systems
- Suitable for sound absorption and noise reduction
- High thermal insulation – λ of 0.034 W/mK
- Non-combustible – Euroclass A1
- Melting point above 1,000°C
- Low water absorption
- Does not rot and does not provide a substrate for the growth of microorganisms
- Suitable for residential, commercial and industrial buildings
Why this product
Stone wool with a density of 120 kg/m³ is designed for projects that require maximum acoustic performance, such as studios, equipment rooms, public buildings or noise-sensitive areas. At 75 mm thick, the material provides greater acoustic mass than a 50 mm slab and allows a further improvement in low-frequency absorption. The high density keeps the material stable inside plasterboard systems, so it is suitable for advanced acoustic systems.
Technical description
ROCKWOOL Thermalrock S is a stone wool slab made from basalt, a natural volcanic rock, processed into a fibrous structure. The product is supplied at a nominal density of 120 kg/m³, a thickness of 75 mm and a slab size of 1,200 × 600 mm.
The material is inorganic, does not rot and is not a food source for microorganisms.
Applications
Suitable for installation inside plasterboard walls and partitions, ceilings and insulation systems, as well as in residential, public, commercial and industrial buildings. The 75 mm thickness is particularly suited to systems with a deeper internal cavity that needs to be filled with high-density stone wool.
Technical specifications
Type: Stone wool
Series: Thermalrock S
Density: 120 kg/m³
Thickness: 75 mm
Slab size: 1.20 × 60
Thermal conductivity: 0.034 W/mK
Water vapour absorption: <0.04% by volume
Water absorption by partial immersion: <0.5 kg/m²
Fire classification: Euroclass A1 – unfaced
Melting point: Above 1,000°C
Thermal performance
Thermal conductivity coefficient:
λ = 0.034 W/mK
The value was tested in accordance with ASTM C518 at a mean temperature of 20°C.
For a thickness of 75 mm, the calculated thermal resistance is approximately R = 2.21 m²K/W.
Fire resistance
The material is non-combustible – Euroclass A1 according to EN 13501-1, for the unfaced product.
In addition, ROCKWOOL specifies a melting point above 1,000°C, so the stone wool is also suitable for systems with fire protection requirements.
Standards
ISO 354 – Sound absorption
EN 13501-1 – Reaction-to-fire classification
ASTM C518 – Thermal conductivity
ASTM C1104/C1104M – Water vapour absorption / moisture resistance
EN 1609 – Water absorption by partial immersion
Installation
The slabs are cut to the dimensions of the cavity and installed within the wall, partition or ceiling system. Install the slabs as a continuous layer and fill the cavity without unnecessary gaps between them.
At a thickness of 75 mm, match the depth of the wall or ceiling system to the slab thickness and avoid compressing the material unnecessarily.
Sustainability
The product is made from basalt – a natural volcanic rock. No CFC, HFC, HCFC or asbestos is used in the manufacturing process. The material is inorganic, does not rot and is not a food source for microorganisms.
Manufacturer data
Manufacturer: ROCKWOOL
Series: Thermalrock S
Density: 120 kg/m³
Thickness: 75 mm
Dimensions: 1.20 × 60
Intended use: Thermal insulation, fire protection and sound reduction/absorption.
| Property | Value |
|---|---|
| Length | 1.20 m |
| Width | 60 cm |
| Thickness | 75 mm (7.5 cm) |
Downloads
- ROCKWOOL technical specifications
- ROCKWOOL stone wool fire classification
- ROCKWOOL European fire classification
- ROCKWOOL 100-120 data sheet
Video – Watch a video about stone wool – ROCKWOOL
