170mm Rockwool Hardrock Multi-Fix DD Underlay Slab

Rockwool HardRock Underlay Slab Multi-Fix (DD) is a premium high-density, non-combustible thermal insulation solution engineered for warm flat roofs. Thoroughly tested to deliver outstanding acoustic performance and fire resistance credentials.

This 170mm Hardrock Multi-Fix insulation board strengthens lightweight flat roof insulation systems by managing sound transmission and reducing noise penetration through the building fabric.

Perfect for high-traffic areas requiring regular upkeep, these 170mm Rockwool Hardrock boards work seamlessly with all roof covering types, from torch-on and pour-and-roll systems to single-ply, EPDM, liquid-applied membranes, and green roofs.

Product specification

• Thickness: 170mm
• Width: 1000mm
• Length: 1200mm
• Pallet Quantity: 7
• Pallet Coverage: 8.40m2
• 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

170mm Rockwool Multi-Fix DD Underlay Slab is a stone wool insulation board featuring a mineral-coated white fleece surface, fully compatible with numerous adhered and mechanically fixed waterproofing solutions including bitumen, single-ply, EPDM, liquid membranes, and green roof systems.

Key features include:

• Zero smoke generation; will not fuel fire development at any point, even during fully developed fire conditions.
• Non-combustible per UK building standards, meeting Zurich School and Academy Design guide requirements and HTM05-03 guidance for healthcare facilities.
• LPCB certified at the highest level, LPS1181: Part 1 EXT – A rated constructions.
• Superior acoustic reduction, sound absorption, and impact (rain noise) performance.
• Satisfies all BB93 (Education) and HTM08-01 (Healthcare) acoustic specifications.
• Acoustic enhancements can earn additional BREEAM credits.
• Maintains dimensional stability.
• Reliable thermal performance without blowing agents, delivering zero ODP and GWP.
• Fully recyclable and reprocessable, minimising waste and reducing costs.

Applications

170mm Rockwool Hardrock Multi-Fix Underlay Slab roofing boards suit the following roofing systems:

• Fully bonded, partially bonded, and mechanically fastened single-ply membrane systems, as well as 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 170mm Rockwool Hardrock DD Underlay Slab

• Manufaturer Link: 170mm Rockwool Hardrock Multi-Fix DD Underlay Slab
• Browse our comprehensive Rockwool Insulation range and refine by thickness or coverage area using the left-hand filters. For expert guidance on product suitability for your specific project or to request a volume discount quotation, contact us via phone on +4402038839057, email sales@insulationbee, or Live Chat - Competitive UK Rockwool Insulation Pricing.