ROCKWOOL HardRock® Multi-Fix (DD) Non-combustible flat roof insulation

HardRock Multi-Fix (DD) is a BBA-approved insulation board, that in addition to thermal comfort, provides independently-tested acoustic and fire resistance properties.

Designed for warm flat roofs, ROCKWOOL HardRock Multi-Fix (DD) is a high density, non-combustible thermal insulation board which has also been tested for acoustic applications and fire resistance. ROCKWOOL 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.

Reaction to fire (Euroclass) A2-s1,d0 (BS EN 13501-1)
Fire resistance Up to 120 minutes
Thermal conductivity 0.039 W/mK
Water vapour resistance 5.9 MNs/gm


Product standards BS EN 13162, ISO 14001
CE Marking CE Marked
BBA Approved Certificate 21/5878
LPCB Certified (LPS 1181: Part 1) Certificate 022g

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