1
Choose what you need
Add products to your basket as normal
Add products to your basket as normal
2
Build a quote
Suppliers will quickly bid their best prices in under 24 hours
Suppliers will quickly bid their best prices in under 24 hours
3
Order
Review the offers and place your order
Review the offers and place your order
Currently in the Southeast
1
Choose what you need
Add products to your basket as normal
Add products to your basket as normal
2
Build a quote
Suppliers will quickly bid their best prices in under 24 hours
Suppliers will quickly bid their best prices in under 24 hours
3
Order
Review the offers and place your order
Review the offers and place your order
Knauf Rocksilk® Flexible Slab 90mm – 600mm x 1200mm (4.32m²)
Knauf Rocksilk® Flexible Slab 90mm – 600mm x 1200mm (4.32m²)
SKU: 226880
Est. £33.00 - £33.00 + VAT
Product Description
Rocksilk® Flexible Slab is a rock mineral wool slab, designed for use in multiple thermal and acoustic applications as well as the fire protection of a loft conversion floor. It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique plant-based binder, ECOSE® Technology.
- Single slab can be used for multiple applications.
- Tested to achieve up to 60 minutes fire resistance when used in the floor of a loft conversion.
- Engineered to adapt to minor imperfections in the substrates and friction fits between studs, joists and rafters.
- Enables existing ceilings to be retained on a loft upgrade whilst meeting building regulations.
- Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants.
Applications: Timber and metal stud partitions; Timber frame walls; Suspended timber floors; Loft conversion floor upgrades; Pitched roofs at rafter level; Internal walls/partitions; Light steel frame walls.
Product Specification
| Applications | Timber and metal stud partitions; Timber frame walls; Suspended timber floors; Loft conversion floor upgrades; Pitched roofs at rafter level; Internal walls/partitions; Light steel frame walls |
| Brand | Knauf |
| Length (m) | 1.2 |
| Length (mm) | 1200 |
| Material | Rock mineral wool |
| Range | Rocksilk® Flexible Slab |
| Thickness (mm) | 90 |
| Width (mm) | 600 |
| Core Material | Rock mineral wool |
| Durability | Odourless, rot-proof, non-hygroscopic; does not sustain vermin; will not encourage growth of fungi, mould or bacteria; life equivalent to that of the structure where installed. |
| GTIN (EAN) | 5012061902198 |
| Manufacturer Product Page | Knauf Insulation Product Page |
| MPN | 457997 |
| Pack Coverage (m²) | 4.32 |
| Pack Qty. (units) | 6 |
| Packs Per Pallet | 12 |
| Pallet Coverage (m²) | 51.84 |
| Thermal Resistance R Value (m²K/W) | 2.4 |
| Board Dimensions (mm) | 1200 x 600 |
| Format | Slab |
| GWP A1–A3 (kgCO₂e/m²) | 3.94 |
| GWP A1–C4 (kgCO₂e/m²) | 4.84 |
| GWP A1–A3 (kgCO₂e/kg) | 1.33 |
| GWP A1–C4 (kgCO₂e/kg) | 1.63 |
| Handling & Storage | Store clean, dry and flat; protect from weather and prolonged sunlight; polyethylene packs are short-term protection only; cover exposed areas during construction; discard damaged or wet products. |
| Reaction to Fire | Euroclass A1 (EN 13501-1) |
| Selling Unit | Pack |
| Standards & Certifications | BS EN 13162:2012+A1:2015; ISO 50001:2018; ISO 14001:2015+A1:2024; ISO 45001:2023+A1; ISO 9001:2015+A1:2024; EUCEB; Declare Red List Free; Indoor Air Comfort® Gold; BES 6001 (Very Good) |
| Sustainability | Made with ECOSE® Technology (plant-based binder); ~35% recycled content; no ozone-depleting substances or greenhouse gases; Eurofins Indoor Air Comfort Gold; Declare ‘Red List Free’. |
| Thermal Conductivity (W/mK) | 0.037 |
| Vapour Resistivity (MNs/g·m) | 5 |
| Availability | In Stock |