40mm Knauf Rocksilk RS60 Building Slab

The 40mm Rocksilk RS60 Knauf Rock Mineral Wool Insulation Slab is a standard-density (60kg/m3) building material that's non-combustible and engineered for diverse applications with outstanding fire performance, achieving Euroclass A1—the highest classification for non-combustible products.

Sized at 1200mm x 600mm, the Knauf RS60 rocksilk insulation slab delivers exceptional thermal and acoustic performance for both new builds and refurbishment work.

These slabs are odourless, non-hygroscopic, and rot-resistant, manufactured without CFCs and HCFCs, and won't support the growth of fungi, mould, or bacteria.

With a certified thermal conductivity (λ - lambda value) of 0.035W/mK, the 40mm Knauf RS60 unfaced insulation slab provides reliable thermal efficiency.

Produced at a density of 60kg/m3, this 40mm RS60 slab works well for many applications, such as internal partitions, timber and metal stud work, and installation between timber rafters and floor joists.

The 40mm Knauf building slabs feature excellent sound absorption properties, delivering impressive sound reduction performance.

Installation is straightforward—simply cut and shape using a large-bladed knife or saw, making 40mm Knauf Rocksilk RS60 insulation slab practical to fit.

Product specification

• Brand: Knauf®
• Model: 40mm Rocksilk RS60
• Thickness: 40mm
• Length: 1200mm
• Width: 600mm
• Dimensions: 1,200mm x 600mm x 40mm
• Board Coverage: 0.72m2
• Pack Coverage: 8.64m2
• Pack Quantity: 12
• R-Value: 1.10m2K/W
• Thermal Conductivity: 0.035W/mK
• Density: 60kg/m3
• Colour: Brown
• Material: Rock mineral wool
• Fire Classification: Euroclass A1
• Vapour Resistivity: 5.00MNs/g.m.
• Fire Reaction: Non-combustible
• Building Regulations: Class '0'
• Finish: Unfaced
• Shipping method: Articulated Vehicle ǀ Courier
• Applications: Floor ǀ Wall ǀ Roof ǀ Partitions
• Foil faced: No
• ECOSE Technology: Yes
• ETA Notification: Yes
• Features: Thermal and Acoustic Insulation Performance
• Manufacturer: Knauf Rocksilk®

Made to order Facings

For a factory applied foil or tissue facing please request a quotation using the website form or by calling our agents. We do offer single side or double side foil/tissue facings.

Applications

40mm Rocksilk Building Slabs suit a wide range of uses, from pitched roof installations between rafters to intermediate floors, floor separations, internal stud partitions, and light steel frame infill. They're commonly used in OEM (Original Equipment Manufacturer) settings for creating thermal, acoustic, and fire-rated products. Thanks to their non-combustible nature, Rocksilk® Building Slabs come in various densities from 45kg/m3 up to 140kg/m3, making them suitable for many different applications.

Benefits

• One slab type works across multiple applications.
• Factory-applied foil or tissue facing options are available, offering flexibility for different project requirements.
• Made from mineral wool, these slabs provide superior sound absorption and noise control compared to many other mainstream insulation products.
• Built from rock mineral wool with a melting point above 1000°C, delivering extended fire resistance performance compared to many alternative insulants.

Info

Browse our full Knauf Insulation range and refine by thickness or coverage using the filters on the left. Need advice on product suitability for your project or a bulk discount quote? Get in touch by phone on +4402038839057, email sales@insulationbee or use Live Chat - Best UK Knauf Loft Insulation Prices.