ThermalFlex™ Cavity

Flexible Reflective Insulation

ThermalFlex™ Cavity is a high performance reflective insulation, vapour barrier and radiant barrier.
ThermalFlex™ Cavity consists of cross linked, closed cell foam core for improved thermal performance.
On each side of this foam core there are layers of reflective foil, one side with an antiglare and the inside
reflective face which provides a high quality finish, particularly for shed applications.
ThermalFlex™ Cavity is also a fibre free insulation and non-allergenic.

ThermalFlex™ Cavity is rated Extra Heavy Duty and is strong and durable, making it perfectly suited for use
in wall applications. ThermalFlex™ Cavity is ideal for use in residential homes, commercial buildings and
domestic sheds, and will improve the energy efficiency and comfort of these buildings.

ThermalFlex™ Cavity also assists in reducing thermal bridging and minimising condensation along with
providing high thermal performance as a radiant barrier.
ThermalFlex™ Cavity is easy to install and is manufactured at 1350 mm wide for maximising coverage and
faster installation.

Product Advantages

  • Insulation, vapour barrier and radiant barrier, reflecting up to 95% of radiant heat.
  • Extra Heavy Duty for strength, durability and maximum tear resistance.
  • Low Flammability to suit bushfire-prone areas.
  • R0.11 flexible insulation to help prevent condensation.
  • Antiglare coating on the outer layer for installation safety and high quality foil finish on the inside.

Applications

Premium wall wrap for brick cavities.

Other Roof Products
Other Wall Products
Blank one so all stay closed
Product Details
Product NameReflex Insulation ThermalFlex™ Cavity
Product Thickness4mm
Roll Size1350 mm x 22.25 m (30m2)
R Values
Total R Value SummarySummerWinter
Brick Veneer Wall
110mm clay brick, 35mm unventilated air gap, ThermalFlex™ Cavity, 90mm unventilated cavity, 10mm plasterboard		RT1.6RT1.6
Double Brick Wall
110mm clay brick walls, 20mm
unventilated air gap, ThermalFlex™ Cavity,
25mm unventilated air gap		RT1.6RT1.7
Product Testing

Summary of Testing Results

Flammability IndexAS 1530.2-1993Low ≤ 5
Material Thermal ResistanceASTMC518R0.11
Duty RatingAS/NZS 4200.1:2017Extra Heavy Duty
Vapour ControlASTM E96Class 2 Vapour Barrier
Vapour PermeanceASTM E96< 0.142 µg/N·s
Water ControlAS/NZS 4201.4:1994Water Barrier
Resistance to Dry DelaminationAS/NZS 4201.1:1994Pass
Resistance to Wet DelaminationAS/NZS 4201.2:1994Pass
Shrinkage (Repeated wetting & drying)AS/NZS 4201.3:1994≤ 0.5%
Emmitance ValueAS/NZS 4201.5:1994Anti-glare side: >0.05 to ≤0.15, Foil side: ≤0.05
Fire Hazard Properties and Bushfire Attack Levels (BAL)
Complies with AS 3959 for Construction of Buildings in Bushfire-Prone Areas, and is suitable for use in all BALs including regions with a Bushfire Attack Level (BAL) LOW – FZ. ThermalFlex™ Cavity meets these construction requirements by having a flammability index ≤5.
Specification Notes

When specifying, state the following:

Product Name: Reflex Insulation ThermalFlex™ Cavity

The insulation to be installed shall be Reflex Insulation® ThermalFlex™ Cavity and shall be installed in accordance with AS 4200.2.
The product must have the following properties:

Duty Classification: Extra Heavy Duty
Material Value: R0.11
Flammability Classification: Low (≤5)
Vapour Barrier Classification: Class 2
Vapour Permeability: 0.142 ug/N.s or less
Water Control Classification: Water Barrier

Installation Instructions

ThermalFlex™ 4 Installation Instructions: Please select the following applications for detail:

  • Residential Brick Cavity Walls
  • Residential Walls

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