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Specified with the structure
Insulation thickness, board types and ceiling systems chosen with the roof, wall and fire design – not added at the end.
Building envelope hub · supplied with your steel structure
Building materials – insulation, boards and ceilings from one steel structure hub
World Steel supplies the materials that complete a steel building – ROCKWOOL stone wool and glass wool insulation, reflective insulation, gypsum and fibre cement boards and ceiling systems – specified with the structure and shipped in one package.
Browse materialsRequest a quotation
- 18
- Material categories
- 69
- Products in the catalogue
- 20
- Product families
- 1
- Shipment with your steel
Categories
Everything that completes a steel building
Each category has its own page – what the material is, where it is used, standards and the products we supply.
Structural steel
Plate, hollow sections, pipe and grades for steel structures
Material guide
Steel plate
S275 / S355, A36 / A572 Gr 50, Grade 250 / 350, SS400 / SM490, Q235 / Q355 – plate for built-up members and connections.
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Material guide
Hollow sections (box)
Square, rectangular and circular hollow sections – EN 10219 / 10210, ASTM A500 / A1085, AS/NZS 1163, JIS G3466, GB/T 6728.
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Material guide
Steel pipe
Seamless and welded pipe – ASTM A53 / A106 / API 5L, EN 10216 / 10217 / 10255, JIS G3452 / G3454, GB/T 8163 / 3091.
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Material guide
Steel grades compared
Nearest equivalent grades across five standards – yield strength, toughness and what to check before substituting.
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Insulation
Thermal, acoustic and fire insulation for roofs, walls and plant
36 products
ROCKWOOL stone wool
Non-combustible stone wool for roofs, walls, sandwich panels, fire stopping and industrial plant – the official ROCKWOOL range.
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Material guide
Glass wool
Lightweight glass mineral wool rolls, blankets and boards for roofs, walls, ceilings and HVAC – thermal and acoustic comfort.
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Material guide
Stone wool vs glass wool
Fire, heat, sound, moisture, weight, strength and cost – which mineral wool fits your roof, wall or plant.
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Material guide
Air-bubble insulation
Aluminium foil on polyethylene air-bubble film – a light radiant barrier under metal roofs and in walls.
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2 products
Other insulation
Foam insulation boards and panels – PU/PIR, EPS, XPS and PE foam – and where each one fits.
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Fire protection
Passive fire protection for steel structures and buildings
Material guide
Steel fire protection
Eight fire protection product groups – coatings, sprays, boards, insulation, fire-rated panels, doors and glazing, firestop and curtains – selected per project and market.
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4 products
Intumescent coatings
Thin-film paints that swell into an insulating char in fire – exposed steel stays visible, slim and architectural.
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6 products
Fire boards
Calcium silicate, vermiculite, fire-rated gypsum and stone wool boards – dry encasement of columns, beams, ducts and walls.
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5 products
Sprayed fire protection
Cementitious and vermiculite sprays – the most economical protection for concealed steel in long fire ratings.
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4 products
Fire stopping
Collars, wraps, sealants, compounds and curtain-wall fire stops that close every gap in a fire-rated wall or floor.
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12 products
Fire-rated building systems
Stone wool sandwich panels, fire doors and glazing, fire shutters and fire and smoke curtains – compartmentation for steel buildings.
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Boards & panels
Wall, partition, façade and lining boards
Material guide
Gypsum board · Sheetrock
Gypsum wallboard for partitions, linings and ceilings – regular, fire-rated, moisture- and impact-resistant – and the approvals each market asks for.
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Material guide
Fibre cement board
Cellulose-fibre-reinforced cement sheets for floors, walls, façades, soffits and wet areas – durable, non-combustible and termite-proof.
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Ceilings
Suspended and flush ceiling systems
Product catalogue
69 products, ready to specify
Every product has its own page with technical data, approvals and the official data sheet.
ROCKWOOL Stone Wool Insulation 36
Roof insulationStone wool blankets, slabs and boards for metal roofs, pitched roofs and flat membrane roofs – heat, rain-noise and fire protection.3 products →
Sandwich panel coreConrock lamella and slabs – the non-combustible structural core of metal-faced sandwich panels for walls, roofs and partitions.1 products →
Wall & façade insulationStone wool for façades, curtain walls, partitions and party walls – thermal, acoustic and fire performance in one material.4 products →
Ceiling & soffitInsulation for concrete soffits above car parks, basements and cellars – warmer, quieter and safer floors above.1 products →
Fire stopping (Conlit®)Collars, wraps, sealants, compounds, putty pads and curtain-wall fire stops that reinstate the fire resistance of walls and floors at service penetrations.11 products →
Industrial (ProRox®)Stone wool pipe sections, wired mats, slabs and blankets for pipes, vessels, boilers and ducts in process, power and oil & gas plants.16 products →Fire-Rated Building Systems – Panels, Doors, Glazing, Shutters and Curtains 12
Fire-rated panelsStone wool sandwich panels for walls, roofs, partitions and compartment walls of steel buildings.4 products →
Fire doors & glazingSteel and glass fire doorsets, glazed fire partitions and fire-rated access panels – tested as complete assemblies.4 products →
Shutters & curtainsActive barriers that close openings on fire alarm – roller shutters, fire curtains, smoke curtains and combined curtains.4 products →Featured products
ROCKWOOLRoof insulationCool 'n' Comfort™ Blanket and SlabCool ’n’ Comfort Blanket and Slab is installed below the metal cladding sheet of a single skin roof system, held by reinforced steel wire mesh and aluminium foil. It is available to suit all types of roofs in residential, commercial and industrial buildings.0.034 W/m·Kλ at 23 °CEuroclass A1Reaction to fire (EN 13501-1)View product →
ROCKWOOLRoof insulationThermalrock® B BlanketThermalrock B (Blanket) is a flexible blanket designed for general insulation applications. It is manufactured in a variety of thicknesses which makes it suitable for the thermal insulation in residential, commercial and industrial buildings.0.034 W/m·KThermal conductivity λEuroclass A1Reaction to fire (EN 13501-1)View product →
ROCKWOOLRoof insulationHardrock®Hardrock provides flexibility in terms of design, cost and usage in a membrane roofing system. ROCKWOOL roofing boards offer three different types of roofing insulation systems to allow owners, designers and installers to achieve the desired performance.0.038 W/m·KThermal conductivity λEuroclass A1Reaction to fire (EN 13501-1)View product →
ROCKWOOLWall & façade insulationCurtainrock®ROCKWOOL CURTAINROCK® is a stone wool insulation board designed for a variety of curtain wall systems i.e. Perimeter Fire Containment System and Through-Penetration Firestop System.0.037 W/m·KThermal conductivity λEuroclass A1Reaction to fire (EN 13501-1)View product →Building envelope hub
Why buy materials from your steel supplier
A steel building is finished by its envelope. Sourcing both from one partner removes interfaces, freight and risk.
02
One model, one take-off
Quantities come from the same 3D model as the steel, purlins and cladding – fewer gaps and overlaps on site.
03
Shipped together
Envelope materials packed and loaded with the steel package – one schedule, one set of documents, one partner.
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Standards of your market
US, Australian, European and Asian standards and the certificates buyers ask for – checked before shipment.
Guides
Know your materials
What each material is, how it is made, its pros and cons and the standards your market asks for.
ROCKWOOL vs Glass Wool – Complete ComparisonA complete comparison of stone wool (ROCKWOOL) and glass wool insulation: raw materials, fire behaviour, temperature limits, thermal and acoustic performance, density, handling, cost and uses.ROCKWOOL Stone Wool InsulationWhat ROCKWOOL stone wool is, how it is made and where it is used – with the ROCKWOOL product range World Steel supplies for buildings, fire protection and industry.Gypsum Board (Drywall / Sheetrock®-type Plasterboard)What gypsum board (drywall, plasterboard, Sheetrock®) is, its types, uses, leading manufacturers, pros and cons and the standards and certificates needed for the US, Australia and Europe.Fibre Cement Board (Cement Board / "Cemboard")What fibre cement board ("Cemboard") is, how it is made, uses, leading manufacturers, pros and cons and the certificates needed to export it to the US, Australia, Europe and other high-end markets. 
Structure + envelope
One quotation for the whole building
Send us the drawings or bill of quantities – we quote the steel, insulation, boards and ceilings together.