TradeSelect ThermalBreak 8

Flexible Reflective Insulation

Product Introduction

Trade Select™ Ametalin ThermalBreak 8™ is an Extra Heavy Duty three-in- one reflective insulation, thermal break and medium vapour barrier for use in all roof, wall and floor types. It meets the NCC/BCA requirements for in-situ material R-value of R0.2 for a thermal break in steel framed construction, and is also suitable for use in timber framed construction. Designed to manage heat gain and heat loss, Trade Select™ Ametalin ThermalBreak8™ offers superior thermal performance to conventional insulation, and reduces thermal bridging and conductivity between building elements.

The ThermalBreak 8 product is the highest rated product in the TradeSelect product range, achieving impressive thermal performance coupled with acoustic benefits. It has some of the highest reflectivity values on the market while retaining effective cost savings due to the additional overlap piece, making ThermalBreak 8 one of the premium products available.

Product Advantages

  • 150 mm flap provided for increased coverage and reduced wastage.
  • Made with high-density XPE foam; compression in-situ is minimised.
  • Contributes a reflective R-value when installed adjacent to an air cavity.
  • Highly effective in dampening noise.
  • Fibre-free and non-allergenic.
  • Water resistant, fire resistant.
  • Rigorously tested by independent recognised accredited laboratories in compliance with AS/NZS 4859.1:2002/Amdt 1:2006 to ensure all product claims are met.


Tile roof sarking, Metal roof sarking, Premium wall wrap, Framed sub-floor insulation, Steel framed construction.

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Product Details
Product NameTrade Select™ Ametalin ThermalBreak 8™
Product Thickness8.4mm
Roll Size1350 mm x 22.25 m + 150 mm lap (30m2 coverage)
Roll Weight17.9 kg
R Values
Roof R Values






ApplicationDescriptionWinter R ValueSummer R Value
Metal Roof unventilated22° Pitched metal roof, 190 mm raked ceilingR⊺1.4R⊺3.7
Metal Roof ventilated22° Pitched metal roof with flat ceilingR⊺1.3R⊺2.8
Metal Roof unventilated22° Pitched metal roof with flat ceilingR⊺1.5R⊺2.4
Tile Roof unventilated22° Pitched tile roof with flat ceilingR⊺1.5R⊺2.4
Commercial Office RoofSuspended ceiling at 1000 mmR⊺1.4R⊺4.6
Warehouse Shed Roof5° metal roof 100 mm ceilingR⊺1.5R⊺3.2
Warehouse Shed Roof5° metal roof with no ceilingR⊺1.0R⊺2.0
Wall R Values






ApplicationDescriptionWinter R ValueSummer R Value
Brick Veneer110 mm brickwork to 90 mm studs with liningR⊺2.2R⊺1.9
Double Brick110 mm brickwork with cavityR⊺2.3R⊺2.1
Stud FramedMetal cladding direct to 90 mm stud, with liningR⊺1.3R⊺2.8
Steel Stud Framed WallMetal cladding direct to 90 mm stud, no liningR⊺1.9R⊺1.7
Product Testing

NCC/BCA Compliant
Trade Select™ Ametalin ThermalBreak 8™ complies with AS/NZS 4859.1:2002/Amdt 1:2006 and AS/NZS 4200.1:1994, and therefore meets all the requirements of the National Construction Code and Building Code of Australia for insulation and pliable building membranes.


Flammability IndexAS 1530.2-1993Low ≤ 5
Thermal ResistanceASTMC518R0.21
Duty RatingAS/NZS 4200.1:1994Extra Heavy Duty
EmmitanceAS/NZS 4201.5:1994Bright side: 0.03 Anti-glare side: 0.05
ReflectivityBright side: 97% Anti-glare side: 95%
Resistance to Water PenetrationAS/NZS 4201.4:1994High
Vapour BarrierASTM E96Medium
Resistance to Dry DelaminationAS/NZS 4201.1:1994Pass
Resistance to Wet DelaminationAS/NZS 4201.2:1994Pass
ShrinkageAS/NZS 4201.3:1994< 0.0%
Surface Water AbsorbencyAS/NZS 4201.4:1994Unclassified
Bushfire Attack Levels
Trade Select™ Ametalin ThermalBreak 8™ complies with AS 3959-2009 Construction of buildings in bushfire-prone areas for use in roof systems BAL – LOW to BAL – 40 and wall systems BAL – LOW to BAL – FZ.
Health and Safety

Ametalin has assessed Trade Select™ Ametalin ThermalBreak 8™ according to the criteria outlined in the National Occupational Health and Safety Commission (NOHSC):1008 (1998) and NOHSC: 1005 (1999). As a result of the assessment, this product is classified as non-hazardous according to the NOHSC criteria. To reduce risk of UV damage when installing this product, wear protective clothing, safety glasses and sunscreen, and work in the shade wherever practical.

Specification Notes
When specifying, state the following:

Product Name: Trade Select Ametalin™ ThermalBreak 8™

The insulation to be installed shall be Trade Select™ ThermalBreak 8™ double sided reflective, fibre-free thermo-reflective insulation, comprised of cross-linked, closed-cell core XPE foam with anti- glare foil facing on one side and plain foil facing on the other side, and 150 mm overlap piece included. Material R-value in-situ R0.2. Product is manufactured by Ametalin and shall be installed in accordance with AS/NZS 4200.2: 1994 Pliable Building Membranes and Underlays, Part 2: Installation Requirements.
Emittance Bright Side: 0.03, Anti-glare Side: 0.05
Material R-value: R0.21 uncompressed / R0.20 in-situ
Water Vapour Transmission (WVT): 1.9 g/m2•24hr
Vapour Resistance: 64.89 MN•s/g
Vapour Barrier Classification: Medium
Water Barrier Classification: High
Duty: Extra Heavy in accordance with AS/NZS 4200.1:1994

Installation Instructions
Trade Select™ Ametalin ThermalBreak 8™ is not designed to withstand prolonged direct exposure to the elements. Accordingly, the outer construction envelope should be installed without delay. Aluminium foil should not come into contact with wet concrete or mortar, as the aluminium is susceptible to alkali corrosion. If installed within 500 metres of the sea, or in a non-residential building where foil surfaces may be exposed to a corrosive atmosphere (including agricultural sheds), foil surfaces should face an enclosed, un-vented air space. To ensure optimum thermal insulation performance, as well as satisfactory durability, a 25 mm air space adjacent to each side of the product is recommended.