Certificates and Standards
Rocksilk® Soffit Linerboard Extra
- Impact-resistant, cementitious facing board ideal for semi-exposed environments.
- Provides a solution to upgrade thermal performance of existing floors without reducing floor height.
- Can be installed without the need to access areas above the floor.
- Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants to reduce the sound transfer between storeys.
Applications
Rocksilk® Soffit Linerboard ExtraRock Mineral Wool
Description & Details
Rocksilk® Soffit Linerboard Extra is a rock mineral wool slab with an impact-resistant cementitious facing board, designed to insulate structural soffits in semi-exposed environments such as open-sided car parks. It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique bio-based binder, ECOSE® Technology.
- Impact-resistant, cementitious facing board ideal for semi-exposed environments.
- Provides a solution to upgrade thermal performance of existing floors without reducing floor height.
- Can be installed without the need to access areas above the floor.
- Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants to reduce the sound transfer between storeys.
- Available with optional fixings which match the colour of Rocksilk® Soffit Linerboard Standard and Extra.
Structural soffit floor
Documents
EN
| Product Data Sheet | ||
|---|---|---|
Rocksilk® Soffit Linerboard Datasheet.PDF /
Feb 2025 /
970.00 KB /
5 pages | ||
Rocksilk® Soffit Linerboard Fixings Datasheet.PDF /
Sep 2024 /
1.61 MB /
5 pages | ||
| Brochure | ||
|---|---|---|
Knauf Insulation Solutions Guide UK.PDF /
Feb 2026 /
19.75 MB /
167 pages | ||
| Manual | ||
|---|---|---|
Rocksilk® Soffit Linerboard Installation Guide.PDF /
Feb 2025 /
2.28 MB /
22 pages | ||
| Safety Data Sheet | ||
|---|---|---|
Rock Mineral Wool with ECOSE® Technology - Safety Data Sheet.PDF /
Sep 2023 /
240.00 KB /
8 pages | ||
| Environmental Product Declaration | ||
|---|---|---|
Rocksilk® Soffit & RS80 EPD S-P-04004.PDF /
Jun 2021 /
1.19 MB /
16 pages | ||
| Sustainability | ||
|---|---|---|
Rock Mineral Wool - BREEAM Helpsheet.PDF /
Feb 2025 /
40.00 KB /
1 page | ||
Declaration of Performance
- Declaration of performance: R4208MPCPR
- Declarations of performance (DoPs), safety data sheets (SDS), and environmental product declarations (EPD) for our offered products can be found via a central Knauf Insulation database.
Technical Data
| Description | Value | Unit | Norm |
|---|---|---|---|
Thermal conductivity declared | 0.034 | W/(mK) | |
Reaction to fire | A1 | EN 13501-1 |
Product Variants & Packaging
Rocksilk® Soffit Linerboard Extra
| Material number | EAN / GTIN | Thickness | Width | Length | Pieces per pallet | m² per pallet |
|---|---|---|---|---|---|---|
682453 | 5056376602619 | 136 mm | 600 mm | 1,200 mm | 18 pc/pal | 12.96 m²/pal |
682455 | 5056376602626 | 166 mm | 600 mm | 1,200 mm | 12 pc/pal | 8.64 m²/pal |
682466 | 5056376602640 | 191 mm | 600 mm | 1,200 mm | 12 pc/pal | 8.64 m²/pal |
682465 | 5056376602657 | 226 mm | 600 mm | 1,200 mm | 10 pc/pal | 7.20 m²/pal |