The 30mm Rocksilk RS100 Knauf Rock Mineral Wool Insulation Slab is a standard-density (100kg/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 materials.
With dimensions of 1200mm x 600mm, the Knauf RS100 rocksilk insulation slab delivers exceptional thermal and acoustic performance suitable for both new builds and refurbishment work.
These slabs are odourless, non-hygroscopic, and rot-resistant, containing no CFCs or HCFCs, and resist fungal, mould, and bacterial growth.
The 30mm Knauf RS100 unfaced insulation slab features a certified thermal conductivity (λ - lambda value) of 0.034W/mK for reliable thermal efficiency.
With a density of 100kg/m3, the 30mm RS100 slab suits numerous applications, such as internal partitions, timber and metal stud work, and installation between timber rafters and floor joists.
30mm Knauf building slabs provide excellent sound absorption qualities, delivering significant sound reduction.
Installation is straightforward—simply cut and shape using a large-bladed knife or saw, making 30mm Knauf Rocksilk RS100 insulation slab convenient to fit.
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.
30mm Rocksilk Building Slabs are flexible products suited to many applications, including pitched roof work between rafters, intermediate floors, floor separation, internal stud partitions, and light steel frame infill. Frequently used in OEM (Original Equipment Manufacturer) applications for manufacturing thermal, acoustic, and fire products, these slabs benefit from non-combustibility. Rocksilk® Building Slabs come in various densities ranging from 45kg/m3 to 140kg/m3, addressing a wide range of project requirements.
Browse our Knauf Insulation range and refine by thickness or coverage using the filters on the left. For advice on product suitability for your project or to request a volume discount quotation, contact us on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Knauf Loft Insulation Prices.








