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Reflectiva Bronze

Reflective membrane with one aluminium face, for unheated attics.

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

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Benefits

Protection against heatwaves in unheated roof spaces: it stops thermal radiation from the roof covering before it heats the attic. It is installed between the two battens, with the aluminium facing upwards, with a ventilated space at the eaves and at the ridge. It is not intended for occupied habitable attics.

Reflectiva Bronze, an Isoflect product
Where it is used

Applications for Reflectiva Bronze

Select the part of the house you wish to insulate.

3D rendering: Reflectiva Bronze 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

See the application →
GARAN warranty label Reflectiva Bronze
10 years

Commercial durability warranty, with GARAN certificate.

Calculate the material requirements for your house

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Technical data

From the technical data sheet

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 →
140 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 →
3 mmTotal thicknessEN 823
40 m²Roll of 1.20 × 33.33 mEN 1848-2
125 g/m²Mass per unit areaEN 1849-2g/m²: the weight of one square metre of product. What it means →
Facing upwardsAluminium face towards the roof covering
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

Insulating a non-habitable attic: on the ceiling slab, not on the roof pitch

If the attic is not occupied, the insulation is installed on the ceiling slab, not on the roof pitch. The correct layers and the four common mistakes.

Read the guide →

Effective solutions for a cold attic, without condensation

A practical guide to effective solutions for a cold attic: insulation, membranes and sealing for reduced heat loss, without condensation or mould in the dwelling.

Read the guide →

How to prevent mould in the attic without costly repairs

Learn how to prevent mould in the attic through ventilation, sealing, correct insulation and condensation control, for a dry and durable structure over time.

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 →

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 →

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 →

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