MINERAL WOOL SHEETS
Mineral wool sheets are semi-rigid, dimensionally stable boards cut from high-density mineral fibre, used as the insulation layer in mineral wall systems, roof decks, curtain wall cavities and acoustic partitions. ISOKING produces them in 1200 × 600 mm modules, in thicknesses from 30 to 100 mm and densities from 40 to 120 kg/m³, with plain, foil-faced and wire-mesh reinforced versions so one product family fits different wall build-ups.
0.036–0.042
W/(m·K) thermal conductivity
Why mineral wall systems specify these sheets
Non-combustible by nature
The mineral fibre core achieves A1 reaction to fire, adds no fuel load to the cavity and produces no burning droplets, so the wall assembly keeps the fire performance it was specified for.
Thermal performance that holds
Conductivity stays between 0.036 and 0.042 W/(m·K) across the service range, so the U-value you calculated at design stage is still the U-value on site years later.
Acoustic control for partitions
The open, entangled fibre structure absorbs airborne sound inside partitions, plant rooms and duct linings, cutting reverberation in mechanically serviced spaces.
Technical specification
Thickness
30, 40, 50, 60, 75 and 100 mm
Panel size
1200 × 600 mm, cut-to-size on request
Thermal conductivity
0.036–0.042 W/(m·K)
Reaction to fire
A1, non-combustible
Maximum service temperature
up to 750 °C
Facing options
plain, aluminium foil, wire-mesh reinforced
Water repellency
hydrophobic treatment available
Square-cut edges and uniform density hold thickness on a mineral wall without sagging.
Where the sheets go
Mineral wall and cavity build-ups
Full-fill or partial-fill insulation behind brick, block and rainscreen cladding, friction-fitted between studs at 600 mm centres.
Curtain wall and metal roofing
Foil-faced sheets act as the thermal break and vapour control layer inside curtain wall pockets and standing-seam roof build-ups.
Acoustic partitions
Density above 80 kg/m³ inside double-stud partitions and plant room lining, with resilient bars to break flanking paths.
Sandwich panel cores and duct lining
Wire-mesh reinforced sheets are laminated into panel cores and pinned into HVAC ductwork where airflow vibration is constant.
Sheets cut to 1200 × 600 mm and laid out for a wall run, with offcuts kept for edge filling.
Packing, loading and OEM
Sheets are compressed into shrink-wrapped bales or cartons on pallets. A 40HQ takes roughly 1,200–1,400 m³ equivalent of 50 mm board depending on density and bale format, and we issue a loading plan with each order so your forwarder can check the container before it leaves. Custom densities, cut-to-size formats, private labels and printed cartons are produced on the same line, which keeps one container able to mix several SKUs.
Quick answers for specifiers
What thickness of mineral wool sheet does a mineral wall need?
Cavity and cladding build-ups are usually supplied at 50 to 100 mm. The exact thickness follows your target U-value and the depth of the stud or rail you are insulating, so send the build-up drawing and we will match the sheet to it.
Can the sheets be foil-faced or wire-mesh reinforced?
Yes. Aluminium foil facing adds a radiant barrier for roof and duct applications, while wire mesh keeps the board intact on vertical walls and in high-vibration equipment where plain board could tear at the fixing line.
Do you supply test reports for export projects?
Reaction-to-fire and thermal conductivity reports are issued with the shipment, and we can prepare project-specific documentation packages for consultants who need to file them before the material reaches site.
Send us your wall build-up
Tell us the substrate, target U-value, thickness and density you need, and we will come back with the sheet format, facing option, packing plan and delivery schedule.
Reply within one working day · OEM labelling available
