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Product images: the manufacturer (official).
Fire-rated insulation
Stone wool fire slab
Dense, non-combustible stone wool slabs used in fire walls, cavity barriers, duct and steel protection systems.
- A1
- Reaction to fire
- > 1,000 °C
- Melting point
- Barriers, walls, ducts
- Use
Supplied by World Steel with your steel building or on its own – one order, one shipment, one partner.
Overview
About Stone wool fire slab
Stone wool fibres keep their form at temperatures far above those of a building fire.
Used inside fire-rated walls and floors, as cavity barriers and as duct and steel wraps in tested systems.
See the ROCKWOOL range for branded products.
Key benefits
- Non-combustible insulation in fire walls
- Adds acoustic and thermal performance
- Cavity barriers in façades and voids
- Compatible with boards and steel framing
World Steel · building envelope hub
How we use Stone wool fire slab in steel buildings
World Steel supplies fire boards with the steel structure, sized from the member schedule and packed with the steel, so the encasement contractor starts as soon as the frame is erected.
- 01Specified with the structure – thickness, density and facing matched to the roof, wall and fire design.
- 02Quantities taken from the same 3D model as the steel, purlins and cladding.
- 03Packed and shipped with the steel package – one delivery schedule to site.
Applications
Where Stone wool fire slab is used
- Fire walls and compartment barriers
- Cavity barriers in façades
- Fire-rated duct and steel protection systems
Technical data
Stone wool fire slab – technical properties
Typical properties
| Property | Unit | Value |
|---|---|---|
| Reaction to fire | — | A1 (EN 13501-1) |
| Melting point | °C | above 1,000 (stone wool) |
| Assessment | — | As part of tested walls, barriers and duct systems |
Values as published by the manufacturer for this market. Always check the current data sheet and the approvals required for your project before ordering.
Fire-rated linings
Related products
← Fire-rated lining boards and slabsFire Protection Boards →
FAQ
Frequently asked questions
What thickness of stone wool fire slab do I need?
It depends on the member size (section factor), the critical temperature and the required fire rating – the fire engineer or the manufacturer's tested data gives a thickness for each member.
Does World Steel supply branded products?
Yes – we supply the brand and listed system your specification or authority requires. This page describes the product type.
One partner for structure and envelope
Send us your drawings or bill of quantities – we quote the steel, insulation, boards and ceilings together and ship them as one package.