HardRock® Multi-Fix (DD) Underlay Slab
Thermal and acoustic insulation for flat roofs.
Application(s)
- Roof
- Flat Roof
Product description
Designed to be installed with HardRock® Multi-Fix DD, HardRock® Underlay is a vital component in a ROCKWOOL flat roof solution. Manufactured from non-combustible stone wool, this robust product offers a thermal and acoustic foundation for a insulated flat roof system.
*Subject to application
- Euroclass A1 in accordance with BS EN 13501-1 Reaction to Fire rating
- Thermal conductivity 0.039 W/mK
- 70kPa Declared Compressive Strength
- Up to 120 minutes of fire integrity and insulation*
Product properties
| Name | Value | Unit |
|---|---|---|
| Declared thermal conductivity | 0.039 | W/mK |
| Reaction to Fire | A1 | Euroclass |
| Long term water absorption | WL(P) | kg/m² |
| Short term water absorption | WS | kg/m² |
| Product standard | EN 13162:2012+A1:2015 | |
| CE certificate number | 0751-CPR-393.0-01 | |
| Facing type, side 1 | No Facing |
Product variants
Areas of application
HardRock® Underlay Slab is suitable for use on the following construction types:
- Flat roof – in conjunction with HardRock® multifix DD
Documentation
Please select and download the documentation pertaining to this product. If you require any certification that is not listed here, please contact us via ukdocumentation@rockwool.com
SUIS ROCKWOOL UK
Safe use instruction sheet ROCKWOOL stone wool insulation products