Knauf Rocksilk RS140 30mm Building Slab

The 30mm Rocksilk RS140 Knauf Rock Mineral Wool Insulation Slab is a standard-density (140kg/m3) building material that's non-combustible and engineered for flexible applications with outstanding fire performance, achieving Euroclass A1—the highest classification for non-combustible products.

With dimensions of 1200mm x 600mm, the Knauf RS140 rocksilk insulation slab delivers excellent thermal and acoustic performance suitable for both new builds and refurbishment work.

These slabs are odour-free, non-hygroscopic, and naturally rot-proof. They're manufactured without CFCs and HCFCs, and won't support the development of fungi, mould, or bacteria.

The 30mm Knauf RS140 unfaced insulation slab features a certified thermal conductivity (λ - lambda value) of 0.034W/mK for reliable thermal efficiency.

With a density of 140kg/m3, the 30mm RS140 slab works well across multiple applications, including internal partitions, timber and metal stud work, and installation between timber rafters and floor joists.

30mm Knauf building slabs provide excellent sound absorption capabilities, delivering significant sound reduction benefits.

Installation is straightforward—simply cut and shape using a large-bladed knife or saw, making 30mm Knauf Rocksilk RS140 insulation slab practical and user-friendly.

Product specification

• Brand: Knauf®
• Model: 30mm Rocksilk RS140
• Thickness: 30mm
• Length: 1200mm
• Width: 600mm
• Dimensions: 1,200mm x 600mm x 30mm
• Board Coverage: 0.72m2
• Pack Coverage: 5.04m2
• Pack Quantity: 7
• R-Value: 0.85m2K/W
• Thermal Conductivity: 0.034W/mK
• Density: 140kg/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 are versatile products designed for various applications, including use in pitched roof constructions between rafters, intermediate floors, separating floors, internal stud partitions, and light steel frame infill. Widely employed in OEM (Original Equipment Manufacturer) applications, these slabs are utilised for manufacturing thermal, acoustic, and fire products. Characterised by non-combustibility, Rocksilk® Building Slabs are offered in a range of densities, from 45kg/m3 up to 140kg/m3, catering to diverse applications.

Benefits

• A single slab addresses multiple applications.
• Factory-applied foil or tissue facing options are available, offering solutions for a wide range of applications.
• Made from mineral wool, it provides superior sound absorption and reduction compared to many alternative insulants.
• Manufactured from rock mineral wool with a melting temperature exceeding 1000°C, delivering extended fire resistance compared to other common insulants.

Info

Explore our Knauf Insulation range and filter by thickness or coverage on the left-hand side of the page. If you'd like guidance on product suitability for your project, or to request a quantity discount quotation, please call us on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Knauf Loft Insulation Prices.