ROCKWOOL HARDROCK Multi-Fix (DD) (15 boards) is manufactured from renewable volcanic stone which produces a non-combustible roofing insulation board. The boards are compatible with a range of flat roof systems, including single-ply, EPDM and liquid membranes, bitumen, and green roofs.

HARDROCK® Multi-Fix (DD) boasts an extremely high acoustic performance – especially in conjunction with ROCKWOOL Acoustic Infills and ROCKWOOL Acoustic Membrane – providing a robust, fire resistant and acoustically sound solution to flat roof insulation.

Tested to the highest European fire classification, HARDROCK® Multi-Fix (DD) meets the highest LPCB standards. It has also achieved the European Reaction to Fire Classification of A1 non-combustibility. In the specification of fire-resistant insulation, it is crucial to consider characteristics such as combustibility and toxicity. HARDROCK® Multi-Fix (DD) provides an acoustically sound, non-combustible and non-toxic solution to flat roof insulation.