150mm Knauf Rocksilk RS45 Building Slab

The 150mm Rocksilk RS45 Knauf Rock Mineral Wool Insulation Slab is a standard-density (45kg/m3) building material, non-combustible and engineered for diverse applications with exceptional fire performance, achieving Euroclass A1—the highest standard for non-combustible products.

Featuring dimensions of 1200mm x 600mm, the Knauf RS45 rocksilk insulation slab delivers outstanding thermal and acoustic properties suitable for both new builds and refurbishment work.

These slabs are odour-free, non-hygroscopic, and rot-resistant, containing no CFCs or HCFCs, whilst resisting fungal, mould, and bacterial growth.

The 150mm Knauf RS45 unfaced insulation slab boasts a certified thermal conductivity (λ - lambda value) of 0.035W/mK for superior thermal efficiency.

With a density of 45kg/m3, the 150mm RS45 slab performs well across numerous applications, from internal partitions to timber and metal stud work, and between timber rafters and floor joists.

150mm Knauf building slabs provide excellent sound absorption qualities, delivering significant sound reduction benefits.

Installation is straightforward—simply cut and shape using a large-bladed knife or saw, making 150mm Knauf Rocksilk RS45 insulation slab practical to fit.

Product specification

• Brand: Knauf®
• Model: 150mm Rocksilk RS45
• Thickness: 150mm
• Length: 1200mm
• Width: 600mm
• Dimensions: 1,200mm x 600mm x 150mm
• Board Coverage: 0.72m2
• Pack Coverage: 2.16m2
• Pack Quantity: 3
• R-Value: 2.85m2K/W
• Thermal Conductivity: 0.035W/mK
• Density: 45kg/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

150mm Rocksilk Building Slabs suit a wide range of uses, including pitched roof installations between rafters, intermediate floors, floor separation, internal stud partitions, and light steel frame infill. Frequently specified in OEM (Original Equipment Manufacturer) applications for creating thermal, acoustic, and fire-rated products, these slabs benefit from non-combustibility. Rocksilk® Building Slabs are supplied across a density range from 45kg/m3 to 140kg/m3, meeting requirements for numerous applications.

Benefits

• One product type addresses multiple application needs.
• Factory-applied foil or tissue facing options are available, expanding the scope of potential uses.
• Rock mineral wool construction provides superior sound absorption and noise control versus standard alternatives.
• Rock mineral wool with a melting point above 1000°C delivers extended fire resistance performance compared to conventional insulants.

Info

Browse our full Knauf Insulation range and refine by thickness or coverage using the filters on the left. For advice on product suitability or bulk pricing, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Best UK Knauf Loft Insulation Prices.