Description

Rockwool RWA45 40mm Insulation 600x1200mm 8.64m2

Enhance acoustic, thermal, and fire-resistant performance in your construction or refurbishment project with this slim-profile Rockwool RWA45 40mm, sized at 1200 × 600 mm. With coverage of approximately 138.24 m² per pallet, it is well suited for large-scale installations in walls, floors, ceilings and partitions where depth is limited but performance cannot be compromised.

Manufactured from high-quality stone wool at a nominal density of around 45 kg/m³, the slab delivers a thermal conductivity (λ-value) of approximately 0.035 W/m·K.  It holds the Euroclass A1 non-combustible classification (BS EN 13501-1), making it suitable for use in demanding building regulations and fire-safety sensitive areas.

This product is designed for easy installation: the slab size corresponds with standard stud or joist spacing (600 mm centres), allowing for straightforward fitting and minimal waste. It’s well suited for applications including internal partitions, separating walls, acoustic upgrades between floors, ceilings, and bespoke overlay systems where thickness must be kept to a minimum. The fibre structure offers excellent sound absorption and attenuation, helping meet acoustic requirements as well as thermal and fire demands.

Key Features

• Thickness: 40 mm

• Slab dimensions: 1200 mm × 600 mm

• Density: ~ 45 kg/m³

• Thermal conductivity: ~ 0.035 W/m·K

• Fire classification: Euroclass A1 (non-combustible)

• Pack/pallet coverage: approximately used for specification (e.g., 8.64 m² per pack of 12 slabs)

• Suitable for acoustic, thermal and fire insulation in multiple applications

Benefits

• Slim profile, strong performance: At just 40 mm thickness, you retain structural depth while achieving acoustic and fire-safety performance.

• Fire-safe solution: The Euroclass A1 rating ensures the slab doesn’t contribute to fire spread, giving added peace of mind.

• Acoustic capability: Stone wool’s fibre structure helps damp sound transmission across partitions and floor/ceiling builds.

• Thermal value included: Helps reduce heat loss, adding value beyond just sound insulation.

• Installation-friendly: Size and format match standard construction spacing, reducing cutting waste and labour time.

• Durable & low-maintenance: Resistant to moisture, rot, vermin and designed for long-term performance.

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.