HardRock® Multi-Fix (DD)
HardRock Multi-Fix (DD) is a BBA-approved dual-density insulation board suitable for various surfaces, including flat roofs. In addition to thermal comfort, it provides independently tested acoustic and fire resistance properties. This product is part of the RockFall System, please refer to the datasheet for details.
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Application(s)
- Roof
- Flat Roof
- Cold Pitched Roof / Loft
Product description
ROCKWOOL HardRock Multi-Fix (DD) is a high density, non-combustible thermal insulation board for flat roofs which has also been tested for acoustic applications and fire resistance.
HardRock Multi-Fix (DD) has been proven to improve the ability of lightweight flat roof systems to control both noise ingress and egress through the building envelope.
Suitable for areas subject to pedestrian traffic and frequent maintenance, the boards are compatible with all roof covering types, including torch-on, pour-and-roll, single-ply, EPDM, liquid applied and green roofs.
- Euroclass A2-s1,d0 in accordance with BS EN 13501-1 Reaction to Fire rating
- Thermal conductivity 0.039 W/mK
- BBA approved (Certificate No. 21/5878)
- Tested in accordance with ISO 140-18 for rain noise
Areas of application
Application for HardRock Multi-Fix (DD) roofing boards are:
- Fully bonded, partially bonded, mechanically fastened single ply membrane systems and EPDM membrane systems
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
HardRock Multi-Fix (DD) Datasheet
HardRock Multi-Fix (DD) is a BBA-approved dual-density insulation board suitable for various surfaces, including flat roofs. In addition to thermal comfort, it provides independently tested acoustic and fire resistance properties.
HardRock Multi-Fix (DD) Tapered Datasheet
ROCKWOOL HardRock Multi-Fix (DD) Tapered is a stone wool insulation board faced with a mineral-coated white fleece. The product is engineered to a fall for effective rain water management.
RockFall Datasheet
Non-combustible insulation for warm pitched-roofs. RockFall has been specially designed as an over rafter mineral wool insulation system for warm pitched roofs and habitable lofts. The system is made up of HardRock® Multi-Fix (DD) boards that are mechanically fixed over the rafters, NyRock® Frame Slab 032 is then fitted between the rafters
HardRock Multi-Fix (DD) BBA Certificate
Certificate No. BBA-21-5878
HardRock Multi-Fix (DD) Installation Guide
Installation guideline for ROCKWOOL HardRock Multi-Fix (DD)
Product properties
| Name | Value | Test standard | Symbol | Unit |
|---|---|---|---|---|
| Declared thermal conductivity | 0.039 | EN 12667 | λD | W/mK |
| Reaction to Fire | A2-s1,d0 | EN 13501-1 | Euroclass | |
| Long term water absorption | WL(P) | EN 12087 | WL(P) | kg/m² |
| Short term water absorption | WS | EN 1609 | WS | kg/m² |
| Product standard | EN 13162:2012+A1:2015 | |||
| Facing type, side 1 | Mineral Fleece | |||
| Declaration of Performance (DoP) number | RWUK-CE-0144-08_english | |||
| BBA certificate number | 21/5878 | n/a |
Product variants
Industrial development achieves thermally efficient green roof with ROCKWOOL®
Discover how ROCKWOOL helped Southern Water create a 17,800m² green roof using sustainable insulation. It enhances biodiversity, manages rainwater, and blends seamlessly into the landscape.
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