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Reflectiva Silver

Thin reflective membrane, with aluminium on both faces.

Technical content: Bogdan Ivănescu, graduate engineer, PhD candidate at the Technical University of Cluj-Napoca · updated on 16.10.2026

Where to buy Reflectiva Silver →

Benefits

Beneath the roof covering, between counter-batten and batten, it returns radiant heat upwards. On the interior side it acts as a reflective vapour barrier, with the joints sealed with Power Tape.

Reflectiva Silver, an Isoflect product
Where it is used

Applications for Reflectiva Silver

Select the part of the house you wish to insulate.

3D rendering: Reflectiva Silver between counter-batten and batten, beneath the roof covering3D rendering: the reflective package, two layers3D rendering: the four-layer reflective package3D rendering: the reflective package for habitable attics3D rendering: renovation of the attic floor slab3D rendering: internal wall insulation, without OSB

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Warranty

The written warranty depends on the application and is stated on the page of each application.

Calculate the material requirements for your house

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Technical data

From the technical data sheet

95–97%Thermal radiation reflectivityReflectivity: the proportion of the radiant heat reaching the foil that is sent back. What it means →
0.05EmissivityprEN 15976Emissivity: an emissivity of 0.05 means that the aluminium face radiates only 5% of the heat that an ordinary surface would radiate, and therefore does not give off heat by radiation. The lower the value, the better. What it means →
190 mWater vapour diffusion resistance, SdEN ISO 12572Sd (m): the degree to which the membrane resists the passage of water vapour, expressed as an equivalent air-layer thickness; high Sd = vapour barrier, low Sd = diffusion membrane, which allows vapour to escape. What it means →
4 mmTotal thicknessEN 823
40 m²Roll of 1.20 × 33.33 mEN 1848-2
−40 °CFlexible, without crackingEN 1109
Technical data sheet (PDF) ↓Declaration of conformity (PDF) ↓
The Isoflect sample pack: samples of the membranes and of Wolle
The sample pack

See and touch the products before ordering

The Isoflect sample pack contains samples of the reflective membranes and of Wolle wool insulation, so that you can compare the materials at home or on site.

Order the sample pack →
Guides

Guides on this product

Where do you use the Gold. Silver or Multistrat membranes, and where those with variable SD?

When the Reflectiva Gold, Silver and Multistrat membranes are used and when a membrane with variable Sd is required, depending on the build-up.

Read the guide →

Review of the REFLECTIVA membrane for habitable attics

The Reflectiva membrane: when it contributes to the control of vapour and condensation and to thermal comfort in habitable attics, unheated attics and walls.

Read the guide →

The technical component of insulation carried out from the interior (habitable attics, roofs, walls, floors, etc.)

What insulation installed internally in habitable attics, roofs, walls and floors involves technically: the order of the layers and vapour control.

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Reflective insulation versus polystyrene - which should you choose?

Compare reflective insulation versus polystyrene: thickness, installation, vapour control and thermal efficiency for habitable attics, walls and floors. Correctly.

Read the guide →

Does reflective insulation really work?

Learn when reflective insulation works correctly, what conditions the installation requires and how it protects the habitable attic from heat, vapour and condensation in safe conditions.

Read the guide →

Reflective insulation versus stone wool for houses

Reflective insulation versus stone wool: compare thickness, vapour behaviour, acoustic comfort and installation to make the correct choice for your home, without surprises.

Read the guide →

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