Rockwool Insulation

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Rockwool Mech Fix System Tapered
Rockwool Hardrock Multi Fix

ROCKWOOL is the world’s second largest insulation producer, manufacturing and supplying a full range of sustainable insulation systems and solutions for the entire building envelope. ROCKWOOL insulation solutions protect people from the cold, the heat, the risk of fire and ambient noise – whether it is form outdoors or adjacent rooms. ROCKWOOL products are in demand across the world with manufacturing facilities operating in three continents (Europe, North America and Asia). 

HARDROCK® Multi-Fix (DD) is versatile flat roof insulation board which carries with it exceptional acoustic and fire resistance properties. Suitable for any building type, HARDROCK® Multi-Fix (DD) is compatible with an array of flat roof systems including many Renolit waterproofing systems.

Manufactured with ROCKWOOL Dual Density stone wool technology, HARDROCK® Multi-Fix (DD) is a roof board with excellent dimensional stability that provides a long term, consistent thermal performance. In addition, HARDROCK® Multi-Fix (DD) is FM approved and achieves the highest European and LPCB fire classifications, offering up to 120 minutes fire resistance.


  • Excellent airborne sound and rain noise reduction
  • Euroclass A1 non-combustible
  • LPCB approved (LPS 1181: Part 1 Ext A)
  • FM approved with additional non-combustible core rating (NCC)
  • High dimensional stability with low expansion coefficient.
  • Can be recycled and reprocessed into new insulation
  • Zero ODP and GWP.