Home > Companies > Novia Ltd > Aluthermo RoofReflex®

Insulated roof and wall underlay membrane that is airtight and ventilated. Aluthermo RoofReflex® can be used in conjunction with standard insulation products to enhance the achieved U-value of any installation, through an integrated insulation layer that is laminated to a high emissivity surface.

Manufactured using hydrophobic and self-extinguishing polyester fibre, created from recycled material. Aluthermo RoofReflex® has integrated sealing tapes to quickly and easily maintain the airtight seal at all joints. Suitable for use below tiles and cladding.


  • Low emissivity external face.
  • Improved acoustic values.
  • Reduces thermal bridge losses.
  • Fully airtight when installed with the supplied integral tapes.
  • Reduces overheating in summer by providing a cooling effect and lowering air-conditioning costs.
  • Adds up to 1.47 m²K/W in thermal resistance (R-value).
  • Hybrid roof and wall membrane combined with an insulation layer.
  • Lower installation costs than PIR systems.
  • EPC-approved and LABC-approved.
  • CE-marked to EN 13859-1 and -2.
  • Ten-year warranty.

Standard product features

Roll size:

1.4 x 10 m.

Surface area per roll:

14 m².


730 g/m².

Thickness of the polyester fibre:

37 mm.

Technical characteristics:

  • Operating temperature range: -40°C to +80°C.
  • Fire resistance classification: E.
  • Thermal core resistance (R-value): 1 m²K/W.
  • Thermal conductivity (K-value to EN 12667): 0.0366 W/m·K.
  • Thermal resistance together with one unventilated air gap, wall (R-value): 1.47 m²K/W.
  • Resistance to water penetration (to EN 1928): W1.
  • Water vapour transmission: 380 g/m².d.
  • Tensile property, longitudinal: 220–360 N/50mm.
  • Tensile property, traversal (to EN 12311-1): 150–275 N/50mm.
  • Resistance to tearing, longitudinal: 120–230 N.
  • Resistance to tearing, traversal (to EN 12310-1): 175–280 N.
  • Standard deviation (Sd) value (to EN 12572:2003): <0.061 m (±0.01).
  • Emissivity: 0.18.
  • Resistance to air penetration (to EN 12114): 0.000 m³/m³.h.50.pa.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-65-50/323 Vapour permeable sheets
45-45-70/360 Multifoil blanket insulation

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Novia Ltd


+44 (0)1622 678952

Product reference

Aluthermo RoofReflex®


Novia Breather Membrane Lap Tape

Manufacturer details

Unit 12,
Heronden Road,
Parkwood Industrial Estate,
Kent, ME15 9YR
Tel +44 (0)1622 678952
Fax +44 (0)1622 679025
NBS Plus
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