






Application
Application
Multi-Application, Ground floors, Internal floors, Separating floors, Pitched roofs at rafter level, Internal walls / partitions, Light steel frame walls, Timber frame wallsMaterial
Rock Mineral WoolDescription
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. Rocksilk® Flexible Slab has been tested to provide 60 minutes fire protection when used in the floor of a loft conversion.
It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation's unique bio-based binder, ECOSE® Technology.
Benefits
- Multi-purpose product which can be used to insulate a wide range of applications on site.
- Flexible on all four sides for quick and simple installation.
- Existing ceilings can be retained on a loft upgrade whilst meeting building regulations.
- Tested at both 400mm and 600mm to EN 1365 to provide one hour of fire resistance in a separating floor.
Product
Specifications
Thickness (mm) | Length (mm) | Width (mm) | Thermal Conductivity (W/mK) | R-Value (M²K/W) | Euroclass Reaction to Fire Classification | Facing | Area Per Pack (M²) | Packs per pallet | Quantity per pack | |
---|---|---|---|---|---|---|---|---|---|---|
40 | 1200 | 600 | 0.037 | 1.05 | A1 | Unfaced | 10.080 | 12 | 14 | |
50 | 1200 | 600 | 0.037 | 1.35 | A1 | Unfaced | 8.640 | 12 | 12 | |
60 | 1200 | 600 | 0.037 | 1.60 | A1 | Unfaced | 7.200 | 12 | 10 | |
70 | 1200 | 600 | 0.037 | 1.85 | A1 | Unfaced | 5.760 | 12 | 8 | |
90 | 1200 | 600 | 0.037 | 2.40 | A1 | Unfaced | 4.320 | 12 | 6 | |
100 | 1200 | 600 | 0.037 | 2.70 | A1 | Unfaced | 4.320 | 12 | 6 | |
140 | 1200 | 600 | 0.035 | 4.00 | A1 | Unfaced | 2.160 | 12 | 3 |
Certification & Memberships








Downloads
Filename
Date
Language
File Size
File Type

December 2022
English
6.6 MB
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