Mineral Wool
Non-combustible fire core
Non-combustible mineral fibre core providing maximum fire safety for cleanrooms, hospitals, and high-risk facilities.
Technical Profile
Key properties
The story
The only core that does not burn. That is not a marketing claim — it is physics.
Mineral wool is made from rock or slag fibres formed at temperatures above 1400°C. A material created in a furnace does not catch fire — it is chemically incapable of contributing to combustion. This is what Class A1 non-combustible certification means in practice: in a fully developed room fire, a mineral wool core panel will not add fuel, will not produce burning droplets, and will not generate the toxic smoke that causes most fire deaths. For hospitals, data centres, and high-occupancy commercial buildings where insurers and building control officers require non-combustible envelopes, there is no substitute. The trade-off is thermal performance — mineral wool conducts heat more readily than PIR. Royal Havilah offsets this with tighter density specification and precision-bonded facings that hold the fibre matrix under long-term load.
Class A1 non-combustible
Does not contribute to fire — the only rating that fully satisfies non-combustible envelope requirements
Hospital and data centre approved
Meets the insurance and building control requirements of the most stringent occupancy classes
Zero toxic smoke contribution
Inorganic mineral fibre produces no harmful combustion gases
Specify Mineral Wool for your project
Our engineers will help you select the right core, thickness, and facing for your performance requirements.