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Non-combustible Facade & Cavity Insulation

IROCK non-combustible facade & cavity insulation is a thermal and acoustic stonewool insulation material widely used in both external and internal wall applications that require high levels of fire safety and thermal performance. IROCK is manufactured by spinning a molten mixture of natural rock materials and other additives to create fine wool-like fibres which are bonded together using a thermoset resin to form a rigid insulation board. Compliant with NCC 2019 & NCC 2022, IROCK offers excellent long-term ageing performance and superior resistance to water absorption compared to other common insulation materials.


IROCK is deemed non-combustible when tested to AS 1530.1 meaning it is compliant for use in external walls and cladding systems where insulation is required to be non-combustible for buildings of types A & B construction.

Moisture Resistant

Although it is not suitable for permanent immersion or exposure to drenching, IROCK insulation board's thermal performance will not be adversely affected by condensation or contact with liquid water.

Excellent Acoustic Performance

Along with excellent fire safety and thermal performance, IROCK also provides an excellent acoustic performance of NRC >1.0 in accordance with ISO 354-2006 providing an ideal solution for party walls.

Light-weight & Ultra-durable

IROCK non-combustible insulation boards are both very lightweight and highly durable for safe hassle-free handling onsite and they can be easily cut and formed to suit almost any application.


With a nominal thermal conductivity of 0.036 W/mK and a very economical price-point, IROCK offers excellent thermal efficiency for minimal upfront cost along with life-cycle energy savings for the building.

Environmentally Friendly

Largely manufactured from recycled materials and natural rock, IROCK is environmentally friendly as an initial product. It also offers numerous environmental benefits in application as thermal insulation.

NCC 2022 Compliant

NCC 2022 Clause C2D10 specifically requires all components of external walls including cladding, insulation and framing to be non-combustible and IROCK is one of only a few materials that meet this criteria.

Superior Ageing Performance

Unlike low density batts which tend to slump in vertical applications or PIR and phenolic insulation which lose thermal performance over time, IROCK is anti-slump and has excellent long-term ageing performance.



Irock Product Range + Bicep Facade System

NC Rigid Insulation
Horizontal System
Vertical System
Visible-fix System
Hanging System


Irock Availability



Lead Time


IR301206 R0.83 IROCK 30mm Stonewool Insulation, 1200 x 600mm 8-10 Weeks 2,160m2
IR401206 R1.11 IROCK 40mm Stonewool Insulation, 1200 x 600mm Stock 8 Boards
IR501206 R1.39 IROCK 50mm Stonewool Insulation, 1200 x 600mm 8-10 Weeks 1,368m2
IR601206 R1.67 IROCK 60mm Stonewool Insulation, 1200 x 600mm Stock 5 Boards
IR801206 R2.22 IROCK 80mm Stonewool Insulation, 1200 x 600mm Stock 4 Boards
IR1001206 R2.78 IROCK 100mm Stonewool Insulation, 1200 x 600mm Stock 8 Boards
IR1201206 R3.33 IROCK 120mm Stonewool Insulation, 1200 x 600mm Stock 5 Boards


Bicep Facade System (See seperate webpage)



Lead Time


BICEP BICEP Facade System for Insulated Facades - CLICK HERE Stock 1 Bracket


Irock Technical Data

Test Item


Thermal Conductivity ASTM C518 0.036 W/mK
Acoustic Performance ISO 354-2006 1.0 NRC
Non-combustible (DtS) AS 1530.1 Pass
Ignightability Index AS 1530.3 0
Spread of Flame Index AS 1530.3 0
Heat Evolved Index AS 1530.3 0
Smoke Developed Index AS 1530.3 0-1
Material Density Actual 60*/80*/100 kg/m3
Compressive Strength ASTM C165-07 10 KN/m2
Maximum Service Temperature Actual <750°C
Melting Temperature Actual >1000°C
Mineral Content Actual >95%
Resin Content Actual <5%
Water Absorption EN 1609 <1.1%
Vapour Permeance ASTM E96 2.72 μg/N.s / Class 4
Fungal Resistance ASTM C655 Pass


*60/80kg/m3 density material is non-stock and supply to order only. Accordingly MOQ's and lead times will apply.




Customer Support

For same day design assistance and technical support please contact our sales team directly on the below contact details. All our sales and technical staff are locally based so we can provide the best possible service and support for your project. You can also request a technical data sheet or project quotation using the below email links;

Frank Kutra
Product Manager
1300 945 123
0477 966 027
This email address is being protected from spambots. You need JavaScript enabled to view it.
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