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Cavity Insulation Board

INSULBOARD C8 is a rigid cavity insulation board composed of a closed-cell thermoset polyisocyanurate foam core with two reflective foil facings. Tested in accordance with AS/NZ standards to comply with BCA/NCC requirements, INSULBOARD C8 is manufactured using blowing agents that are CFC/HCFC-free and have zero Ozone Depletion Potential (ODP). Providing higher R-values from less thickness, INSULBOARD C8 gives sustained thermal performance over time and is the go to option for all masonry cavity applications.  



Excellent Thermal Performance

INSULBOARD C8 provides excellent thermal properties with one of the lowest thermal conductivity ratings of any insulation material on the market at 0.022 W/mK.

Fire Testing

INSULBOARD C8 meets or exceeds all mandatory standards of the NCC/BCA and is therefore suitable for all applications including cavities, concrete wall framing and soffits.

Environmentally Friendly

INSULBOARD C8 cavity insulation is manufactured with a CFC/HCFC free blowing agent with Zero Ozone Depletion Potential (ODP) for a greener world.

Proven Performance

Used widely for all cavity applications on projects throughout Western Australia, INSULBOARD C8 can be specified and used with absolute confidence.

BCA Compliant

INSULBOARD C8 is compliant with AS/NZS 4859.1 and relevant Australian standards, giving confidence to builders and contractors for suitability in all cavity applications.

Fibre-free Material

Composed of a uniform closed-cell polyisocyanurate foam core with two foil facings, INSULBOARD C8 is non-irritant to the skin and non-allergenic.

Clear Cavity Maintained

When INSULBOARD C8 is used in wall cavity application a clear cavity is still maintained making the cavity easily accessible for services such as electricity and water.

More Cost Effective

Due to superior manufacturing technology and large volume production, INSULBOARD C8 is a more cost effective high R-value insulation than other alternatives.


INSULBOARD C8 Cavity Insulation Board

Code R-value




IBF272312 R1.23

INSULBOARD 27mm Rigid Insulation, 2300 x 1200mm


1 Board 

IBF3702312 R1.68 INSULBOARD 37mm Rigid Insulation, 2300 x 1200mm Stock 1 Board
IBF4702312 R2.14 INSULBOARD 47mm Rigid Insulation, 2300 x 1200mm Stock 1 Board
IBF5702312 R2.71 INSULBOARD 57mm Rigid Insulation, 2300 x 1200mm Stock 1 Board
IUC250 NA INSULBOARD Universal Retainer Clips, 250 Pack Stock 1 Pack
ITR4850 NA INSULTAPE 48mm Reinforced Foil Tape, 50m Roll Stock 1 Roll


INSULBOARD C8 Product Data

Test Item


Thermal Conductivity (Below 50mm) W/mK 0.022
Thermal Conductivity (Above 50mm) W/mK 0.021
Emittance Actual 0.04
Ignitability AS 1530.3 0
Flame Spread AS 1530.3 0
Heat Release AS 1530.3 0
Smoke Development AS 1530.3 2
Fire Performance ISO 9705 CertMark Group 1
Compressive Strength ASTM C1289-12 >110



INSULBOARD C8 Specification – Cavity Wall

Application: Cavity wall insulation
Project: ________________________________

The cavity wall insulation shall be INSULBLOARD® C8 ____ mm thick, with a thermal value of R____, comprising a closed-cell CFC/HCFC-free and zero ozone depletion potential (ODP) rigid thermoset polyisocyanurate foam core with two reflective foil facings tested in accordance with AS/NZ standards to comply with BCA/NCC and manufactured by BLUECHIP (08 9451 2344).

Fire Properties
In accordance with AS 1530.3, INSULBLOARD® C8 achieves the following results:
• Ignitability: 0
• Flame spread: 0
• Heat evolved: 0
• Smoke development: 2
Download INSULBOARD® C8 Cavity Wall Specification





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