Description

Rockwool RWA45 100mm Insulation 600x1200mm 2.88m2

Boost thermal, acoustic and fire protection with this rockwool rwa45 100mm acoustic insulation slab, sized at 1200 mm × 600 mm and covering approximately 2.88 m² per pack (typically 4 slabs).

Manufactured from high-density stone wool (approx. 45 kg/m³) and resin-bonded, this slab delivers an effective thermal conductivity of around 0.035 W/m·K. It is non-combustible with a Euroclass A1 fire rating, making it suitable for demanding partition walls, separating floors, ceilings and other applications where fire and acoustic performance are essential.

The 100 mm thickness provides enhanced sound-insulating mass and better thermal performance in one product—ideal when you need higher performance but want to keep build-up minimal. The slab’s size aligns with standard stud and joist spacing (1200 × 600), simplifying installation and reducing waste.

Applications include internal and separating walls, intermediate floors, ceilings, stud wall partitions and other areas where acoustic separation and fire protection are required. The stone wool composition also gives excellent sound absorption properties, resisting vibration and sound transmission.

Key Features

• Size: 1200 mm length × 600 mm width.

• Thickness: 100 mm

• Pack coverage: ~ 2.88 m² per pack (4 slabs)

• Thermal conductivity (λ-value): ~ 0.035 W/m·K

• Density: ~ 45 kg/m³

• Fire rating: Euroclass A1 (non-combustible)

• Material: Stone wool / mineral wool slab, water-repellent, rot-proof, dimensionally stable.

Benefits

• High acoustic & thermal performance: 100 mm thickness plus stone wool density gives excellent sound reduction and heat retention.

• Improved fire safety: Euroclass A1 rating helps enhance fire compartmentation.

• Fast, efficient installation: Standard slab size fits joist/stud spacing, reducing cutting and waste.

• Versatile application: Suitable for walls, floors, ceilings—especially where acoustic separation or enhanced performance is required.

• Long-term durability: Stone wool construction resists moisture, mould, rot, and retains performance over time.

This product is available in other sizes which can be found here.

If you require an extremely high performing, easy to handle multi-application insulation, this product is perfect for the job. If you require a high volume of this product – please contact us for a quote.

Contact us today for more information on 0113 204 7303 or contact us here.