105mm Rockwool Hardrock Multi-Fix DD Boards

Rockwool HardRock Multi-Fix (DD) delivers high-density, non-combustible thermal insulation specifically engineered for warm flat roofs. Rigorous testing confirms superior acoustic performance and fire resistance credentials.

These 105mm boards strengthen lightweight flat roof insulation systems by effectively suppressing noise transmission through the building envelope.

Perfect for roofs experiencing pedestrian activity and regular maintenance access, these 105mm Rockwool Hardrock boards work seamlessly with all roof covering types—torch-on, pour-and-roll, single-ply, EPDM, liquid-applied, and green roofs.

Product specification

• Thickness: 105mm
• Width: 1000mm
• Length: 1200mm
• Pallet Quantity: 12
• Pallet Coverage: 14.40m2
• Density: 160kg/m3
• Weight/m2: 9.6kg
• Weight: 230.4kg
• Thermal Conductivity: 0.039W/mK
• R-Value: 1.54m2K/W
• Fire Rating (Reaction to Fire): A1(Non-combustible)
• Application: Primary base layer for all systems
• Applications: Torch applied, pour and roll bitumen, single ply and EPDM mechanical or adhered systems, liquid applied systems and green roof

This stone wool insulation board features a mineral-coated white fleece surface, delivering compatibility with numerous adhered and mechanically fixed waterproofing solutions including bitumen, single-ply, EPDM, liquid membranes, and green roof systems.

Key features include:

• No smoke hazard—will not fuel fire growth at any stage, including fully developed fire conditions.
• Non-combustible per UK building regulations, meeting Zurich School and Academy Design guide and HTM05-03 healthcare guidance.
• LPCB approved at the highest level, LPS1181: Part 1 EXT – A rated constructions.
• Outstanding acoustic reduction, absorption, and impact (rain noise) performance.
• Complies with all BB93 (Education) and HTM08-01 (Healthcare) acoustic standards.
• Acoustic solutions generate additional BREEAM points.
• Dimensionally stable throughout service life.
• Consistent thermal performance with zero blowing agents, zero ODP and GWP.
• Fully recyclable and reprocessable, minimising landfill impact and reducing costs.

Applications

105mm Rockwool Hardrock Multi-Fix roofing boards suit the following roofing systems:

• Fully bonded, partially bonded, and mechanically fastened single-ply membrane systems, plus EPDM membrane systems.

• Torch-applied, bitumen-based, and mastic asphalt built-up systems.

• Liquid-applied systems.

• Green roof systems.

• Rockwool Acoustic Membrane is a high-density polymer mass layer that, when combined with HardRock Multi-Fix (DD), offers enhanced acoustic performance for the highest specifications.

• Rockwool insulation Acoustic Infills are tissue-wrapped, trapezoidal-shaped trough inserts designed to improve the acoustic absorption of perforated metal decks.

More Information on 105mm Rockwool Hardrock DD

• Manufaturer Link: 105mm Rockwool Hardrock Multi-Fix DD
• Browse our Rockwool Insulation range and refine by thickness or coverage using the left-hand filters. For project suitability advice or bulk pricing, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK Rockwool Insulation prices.