30mm Knauf Rocksilk RS45 Building Slab

The 30mm Rocksilk RS45 Knauf Rock Mineral Wool Insulation Slab delivers standard-density (45kg/m3) performance with outstanding fire safety credentials. This non-combustible material achieves Euroclass A1 classification, the highest rating available for non-combustible building products.

Sized at 1200mm x 600mm, the Knauf RS45 rocksilk insulation slab provides excellent thermal and acoustic performance for both new builds and refurbishment work.

These slabs are odourless, non-hygroscopic, and naturally rot-proof. They contain no CFCs or HCFCs, and resist fungal, mould, and bacterial growth.

The 30mm Knauf RS45 unfaced insulation slab features a certified thermal conductivity (λ - lambda value) of 0.035W/mK for reliable thermal efficiency.

With a density of 45kg/m3, the 30mm RS45 slab works well across multiple applications, including internal partitions, timber and metal stud work, and installation between timber rafters and floor joists.

The 30mm Knauf building slabs deliver excellent sound absorption, providing meaningful sound reduction benefits.

Installation is straightforward—simply cut and shape using a large-bladed knife or saw. 30mm Knauf Rocksilk RS45 insulation slab makes the job easier.

Product specification

• Brand: Knauf®
• Model: 30mm Rocksilk RS45
• Thickness: 30mm
• Length: 1200mm
• Width: 600mm
• Dimensions: 1,200mm x 600mm x 30mm
• Board Coverage: 0.72m2
• Pack Coverage: 11.52m2
• Pack Quantity: 16
• R-Value: 0.85m2K/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

30mm Rocksilk Building Slabs suit a wide range of building scenarios. Use them between rafters in pitched roof construction, within intermediate floors, as separating layers, in internal stud partitions, and for light steel frame infill. These slabs are popular in OEM (Original Equipment Manufacturer) applications for creating thermal, acoustic, and fire-rated products. Thanks to their non-combustible nature, Rocksilk® Building Slabs are manufactured across a range of densities from 45kg/m3 to 140kg/m3, meeting the needs of diverse building projects.

Benefits

• One slab type handles multiple applications with ease.
• Factory-applied foil or tissue facing options are available, expanding the scope of potential uses.
• Rock mineral wool construction delivers superior sound absorption and noise reduction compared to many mainstream alternatives.
• The melting temperature exceeds 1000°C, providing extended fire resistance performance compared to standard 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 for the best UK Knauf Loft Insulation prices.