HardRock® Multi-Fix (DD) Tapered
ROCKWOOL HardRock® Multi-Fix (DD) Tapered is a BBA-approved stone wool insulation board, fabricated to provide a fall across a roof suitable for drainage and water management.
The product is faced with a mineral-coated glass fibre tissue which ensures compatibility with a wide range of adhered and mechanically-fixed waterproofing systems - including bitumen, single-ply, EPDM and liquid membranes, as well as green roof systems.
For ease of specification, HardRock Multi-Fix (DD) Tapered is backed by a complete design to delivery service.
Specification
| NBS Clause | Length (mm) | Width (mm) | *Approved thickness range (mm) |
J21-425 J31-334 J41-425 J42-425 | 1200 | 100 | 60 - 185 |
*Thickness options may be subject to a minimum production volume. Speak to the specification team for guidance.
Standards and Certification
| Product standards | BS EN 13162, ISO 14001 |
| CE Marking | CE Marked |
| BBA Approved | BBA approved (21/5878) |
Technical Properties
Reaction to fire (Euroclass) | A2-s1, d0 |
Thermal conductivity | 0.039 W/mK |
Water vapour resistance | 5.9 MNs/gm |
Thermal Performance
Insulation layer 1 (mm) | Insulation layer 2 (mm) | Single ply membrane U-value (W/m2K) | Bitumen (2-layer felt) U-value (W/m2K) |
| 150 | 60 | 0.18 | 0.18 |
| 150 | 85 | 0.16 | 0.16 |
| 150 | 105 | 0.15 | 0.15 |
Acoustic Performance
| Insulation layer 1 (mm) | Insulation layer 2 (mm) | Airborne reduction (dB) | Rain intensity (dB) | Airborne reduction (dB) | Rain intensity (dB) |
| 150 | 60 | Rw 44 | LIA 48.7 | Rw 45 | LIA 47.5 |
| 150 | 85 | Rw 45 | LIA 47.8 | Rw 46 | LIA 46.7 |
| 150 | 105 | Rw 46 | LIA 47.1 | Rw 47 | LIA 46.1 |
CAD Drawings
Download CAD Drawings here
