The Rockwool HardRock Multi-Fix (DD) is a high-density, dual-density stone wool insulation board engineered for superior thermal, acoustic, and fire performance in flat roof applications. Designed for use across a wide range of roof systems, it provides long-lasting durability, effective sound control, and non-combustible fire protection, making it a trusted solution for commercial and industrial projects.

Benefits

Dual-density design provides a robust upper layer and resilient lower layer for strength and impact resistance
Low thermal conductivity of 0.039 W/m·K, enhancing energy efficiency and comfort
Euroclass A2-s1,d0 non-combustible rating for exceptional fire performance
Proven acoustic performance, reducing rain noise and sound transmission through roof systems
Compatible with all common roof coverings, including torch-on, pour-and-roll, single-ply, EPDM, liquid-applied, and green roofs
Suitable for areas with light foot traffic and regular maintenance access
BBA certified (Certificate No. 21/5878) for proven quality and reliability
Water-resistant and dimensionally stable, ensuring consistent long-term performance
Made from natural stone wool, supporting sustainable and fire-safe construction

Good to Know

Ideal for use in flat roofs, including warm roofs and green roof systems
Suitable for fully bonded, partially bonded, or mechanically fastened single-ply and EPDM systems
Can be easily cut using a serrated or utility knife; wear gloves and goggles to avoid irritation
Store under cover, off the ground, avoiding prolonged exposure to sunlight and rain
Specialist PPE not required, though a dust mask is recommended when cutting in unventilated areas

Loft Insulation Board