Polyair - Thermo Reflective Products

Bradford Polyair™ is a range of thermo reflective insulation products that reduce radiant heat gain in roofs and walls. The products can be used in a range of residential applications, commercial applications and in sheds.

Polyair Performa XHD
Polyair Performa
Polyair Unicell

Bradford Polyair Unicell

Polyair Unicell is an extra heavy duty, high grade insulation specifically designed for sheds. This commercial grade product is Australian made, fully compliant and provides a high performing radiant heat barrier and moisture barrier in one product.

Polyair Unicell Images 1

The special antiglare coating significantly reduces the heat gain inside a shed by reflecting up to 95% of radiant heat flow. Polyair Unicell incorporates a 4mm thick internal cell structure that provides an engineered air cavity within the product. This cell structure reduces heat transfer from the antiglare outer foil surface to the inner silver foil surface.

Polyair Unicell Images 2

Have you considered potential future uses for your shed?

At some point in your shed’s life-cycle, you might consider using it as a hobby room, workshop, home office or games room – in which case you’ll need quality insulation to ensure your shed is comfortable.

What valuables will be stored in your shed?

Whether your shed is used for storing a car, boat or motorbike, machinery, furniture or farming equipment you need to take adequate measures to protect these valuables from the sun’s radiant heat.

Specification Table

  Thickness (mm) Roll Size (m x mm) m2 Per Roll (m2) Roll Diameter (mm) Roll Weight (kg) Product Code
Unicell 4 40 x 1350 54 430 21 127418
Unicell - 1.5m wide 4 25 x 1500 37.5 370 15 130301
Unicell - Self adhesive 4 40 x 1350 54 430 21 130304


Duty Table 1 – AS/NZS 4200.1:1994 Extra heavy duty
Vapour Barrier ASTM E96 Medium
Emittance AS/NZS 4201.5:1994/ASTM E408 Double-sided reflective
Antiglare Face E0.05
Silver Face E0.03
Material thermal resistance ASTM C518 0.1m² K/W
Water Barrier AS/NZS 4201.4:1994 High
Absorbency AS/NZS 4201.4:1994 Unclassified
Shrinkage AS/NZS 4201.4:1994 <0.5%
Resistance to dry delamination AS/NZS 4201.4:1994 Pass
Resistance to wet delamination AS/NZS 4201.4:1994 Pass
Surface corrosion AS/NZS 4859.1:2002 Pass
Fire – BCA Classification AS/NZS 3837:1998 Group 1
Flammability index AS 1530.2 Low (≤5)
Early fire hazard Indices AS/NZS 1530.3  
Ignitability AS/NZS 1530.3 0
Spread of flame AS/NZS 1530.3 0
Heat evolved AS/NZS 1530.3 0
Smoke developed AS/NZS 1530.3 2

Polyair Unicell Images 3


Polyair Unicell Images 4

Thermal Classification Results

AS/NZS 4859.1:2002/amdt 1. Total R-Value performance for Bradford Polyair Unicell.


Shed Roof Pitch (no ceiling) Heat Flow Up (winter) Heat Flow Down (summer)

Outdoor Temperature: 12oC
Outdoor Temperature: 36oC
1o - 2o pitch
RT 0.8 RT 1.7
3o - 11o pitch
RT 0.8
RT 1.6
12o - 19o pitch
RT 0.8
RT 1.5
20o - 25o pitch
RT 0.8
RT 1.4

Total R-Value Assumptions

The contribution of Polyair to a Total R-Value depends on the installation and environmental conditions. The Total R-Value will be reduced in the event of the accumulation of dust on upward facing surfaces and in those cavities that are ventilated. Thermal calculations are based on Australian parameters and in accordance with AS/NZS 4859.1:2002/Amdt.1. The contribution of Polyair towards the Total R-Value depends on installation and environmental conditions. For upward facing surfaces of horizontal or sloping reflective insulation in non-vented cavities where no special precautions for prevention of dust ingress have been included, the Total R-Value is calculated based on an emittance for the case of dust cover in accordance with AS/NZS4859.1 Paragraph K3.2(a)(ii), unless otherwise stated. For calculation purposes, the air gaps are assumed as still parallel air gaps unless otherwise stated and the membrane continuous.

Polyair Unicell White

Polyair Unicell provides an extra heavy duty sarking and high grade insulation all in the one product. Download the brochure for more information.


Contact our specialist team

For help with:

  • Technical assistance
  • Specification assistance
  • Pricing and tenders