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Tyvek® Reflex Membrane

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Improve Thermal Efficiency With a Heat Reflective Membrane

A Tyvek® Reflex heat reflective membrane helps to improve thermal efficiency by reflecting radiant heat in summer, and reducing convective heat loss in winter.

Tyvek® Reflex - Improved U-value without increased wall thickness

Tyvek® Reflex is a strong, water-resistant breather membrane with a metallised surface. It is suitable for use in any wall system that requires secondary protection from external moisture. This low emissivity membrane is particularly effective in lightweight wall construction such as timber or metal frame systems, and is also popular for masonry and internal insulation upgrades.

Successfully installed in the UK since 2002, Tyvek® Reflex is the first reflective breather membrane for thermal management. Its airtight and water resistant yet vapour-open properties help to create an energy efficient construction that is money saving and lasts the lifetime of the building.

Low Emissivity for Lower U-Values

The emissivity of a material is the ability of its surface to emit energy by radiation. The lower the emissivity value, the more reflective the material is – and the better the material performs as a thermal insulation layer in combination with an air gap. With an emissivity value of just 0.09, Tyvek® Reflex reflects 91% of radiant heat for greater thermal comfort and enhanced airtightness. This in turn reduces the construction’s overall thermal transmittance, or U-value.

Key Benefits of DuPontTM Tyvek® Reflex

  • High thermal performance due to low emissivity surface (0.09)
  • Keeps building cool inside by blocking 91% of radiant heat in summer
  • Lightweight, flexible, easy to install
  • Can be left uncovered for up to 4 months while retaining full performance
  • Trusted performance and proven durability
  • Fully BBA, BRE and TRADA certified; approved by UKTFA – covers Compliance with Codes & Standards
  • CE marked

Key Properties of DuPontTM Tyvek® Reflex

  • Style name: 3583M
  • Composition: High density polyethylene with metallised surface
  • Roll sizes:
    • 0.48m x 100m
    • 1.50m x 100m
    • 2.7m x 100m
  • Roll weights: 4.2kg / 13.1kg / 25kg
  • Mass per unit area:   84 g/m2
  • UV exposure:  4 months
  • Product thickness = functional layer thickness: 220 µm
  • Water vapour transmission (Sd): 0.03m
  • Emissivity: 0.09
  • CE marking: Yes
  • BBA Certificate: 90/2548

INFORMATION & IDEAS