40mm Rockwool RW3 Acoustic Insulation Slab

40mm Rockwool RW3 Acoustic Insulation Slab delivers outstanding thermal, acoustic, and fire protection for a broad spectrum of construction projects. These premium resin-bonded slabs combine multiple performance benefits with flexible thickness and density options, making them suitable for bespoke project requirements. Custom facings are available to match your specific building needs.

Perfect for general construction work, these 40mm ROCKWOOL slabs provide reliable acoustic and thermal insulation across partition walls, ceilings, floors, and roofs. Their versatility allows straightforward installation in numerous building scenarios.

Achieving Euroclass A1 non-combustible status, 40mm Rockwool RW3 delivers premium fire safety. When incorporated into ceilings, walls, and floors, these slabs help contain fires and reduce their impact by creating effective fire compartments.

These 40mm RW3 slabs feature a Lambda value of 0.034 W/mK and come in eight standard thicknesses from 25-100mm, providing a dependable solution for meeting insulation requirements across different building specifications.

Product specification

• Brand: Rockwool®
• Model: 40mm RW3
• Dimensions: 1,200mm x 600mm x 40mm
• Thickness: 40mm
• Length: 1200mm
• Width: 600mm
• Board Coverage: 0.72m2
• Pack Coverage: 7.20m2
• Pack Quantity: 10
• R-Value: 0.70m2K/W
• Thermal Conductivity: 0.034W/mK
• Density: 60kg/m3
• Material: Stone wool insulation slab
• Profile: Square Edge
• Colour: Light brown
• Vapour Resistivity: Negligable, Water Repellent
• Building Regulations: Class '0'
• Compilance: Compliance BS EN 13162, ISO 14001
• Fire performance: Euroclass A1 (non-combustible)
• Finish: Unfaced
• Shipping method: Articulated Vehicle ǀ Courier
• Applications: Walls ǀ Ceilings ǀ Floors ǀ Roofs
• Foil faced: No
• Features: Fire protection ǀ Acoustic ǀ Thermal
• Manufacturer: RW3 Prorox SL930®

Made To Order Facings

Black or white tissue facings, plus aluminium foil options, can be specially ordered subject to production feasibility and minimum order requirements. Contact our team at sales@insulationbee.co.uk or ring 02038839057 to discuss your custom facing needs.

Key Features

• Superior thermal, acoustic, and fire performance combined.
• Non-combustible Euroclass A1 rated material.
• Simple to handle, cut, and fit into place.
• Provides exceptional fire resistance.
• Robust and long-lasting insulation slab product.
• Retains peak performance throughout the building's lifespan.
• Water-repellent surface properties.
• Prevents moisture accumulation, damp, and decay.
• Excellent sound dampening for effective noise reduction.
• Thermal conductivity (λ - lambda value) of 0.034W/mK.
• Contains no CFCs or HCFCs.
• Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP).

Applications

• Ground floors
• Internal floors
• Separating floors
• Pitched roofs at rafter level
• Internal walls
• Partitions
• Steel frame walls
• Timber frame walls

Versatile insulation slabs for a wide range of building applications

40mm Rockwool RW3 Slabs work well across diverse general building projects, delivering acoustic, thermal, and fire protection for walls, ceilings, floors, and roofs. Available in multiple thicknesses and densities between 45 and 140 kg/m3, these slabs can be customised with black or white tissue facing or foil facing on one or both sides, depending on production capability.

Fire Performance

ROCKWOOL RW 40mm Slabs are non-combustible and achieve an A1 reaction to fire classification under EN13501-1 standards.

Acoustic Performance

Stone wool's random fibre structure and density work together to capture sound waves and reduce vibrations. This makes it highly effective at minimising external noise when used in external walls.

Additionally, 40mm Rockwool insulation maintains its form and thickness over the building's entire lifetime. This consistent structural stability guarantees reliable acoustic insulation performance year after year.

Extras

1. Engineered to provide multiple thermal and acoustic benefits.
2. Ideal for a wide variety of general building applications.
3. Non-combustible with Euroclass A1 rating per EN 13501-1 standards.
4. Supplied in various thicknesses and densities to suit different project specifications.
5. Black or white tissue facings, plus aluminium foil options, can be specially ordered subject to production feasibility and minimum order requirements.

Info

Browse our full Rockwool Insulation range and use the left-hand filters to sort by thickness or coverage. For advice on product suitability for your project or to request a bulk discount quotation, contact us on +4402038839057 , email sales@insulationbee , or use Live Chat - Lowest UK Rockwool Mineral Wool Insulation Prices.