A system for managing moisture through the building envelope

Izoterm Izospan combines roll materials that protect insulation from external moisture and wind with an internal layer that limits the flow of water vapour from occupied spaces.

AIzoterm Izospan A2
Izoterm Izospan A1
Izoterm Izospan A2
Izoterm Izospan A3

A series — vapour-open wind and moisture protection for the outer layer

  • 24–90g/m² weight
  • 1600mm width
  • 35–70m² per roll

Two layers. One purpose

Select a material by its position and task in the assembly, not by the letter in its name alone.

A
01

On the exterior

The vapour-open wind and moisture layer helps vapour leave the insulation while shielding the assembly from external moisture and air movement.

  • A1 · 25 g/m²
  • A2 · 50 g/m²
  • A3 · 90 g/m²
B
02

On the interior

The vapour-control layer limits humid indoor air from entering the insulation and structural layers.

  • B1 · 24 g/m²
  • B2 · 35 g/m²
  • B3 · 60 g/m²

For the building's main assemblies

The final layer build-up and installation method must follow the project design and applicable building regulations.

01

Insulated pitched roofs

Moisture management on both sides of the thermal insulation.

02

Timber-frame walls

Exterior wind protection and interior vapour control.

03

Externally insulated walls

Protection for the insulation against air movement and external moisture.

04

Ventilated facades

A protective layer behind the facade cladding.

05

Attic and intermediate floors

Reduced moisture exposure for insulation and timber elements.

06

Floors and lower decks

Control of vapour and moisture movement for the service conditions.

Start with the assembly

A reliable solution comes from the coordinated performance of every layer, not from a single roll in isolation.

  1. 01type of construction to protect
  2. 02layer position relative to insulation
  3. 03required vapour permeability
  4. 04mechanical load during installation
  5. 05temporary exposure to sunlight
  6. 06roll area and installation pace

This page provides general guidance. Final selection must be based on project calculations and the manufacturer's technical documentation.

From web formation to the finished roll

The production line covers polymer web formation, layer bonding, slitting, winding and packaging of the finished material.

Izoterm Izospan production line
Izoterm Izospan production line
Polymer web formation
Polymer web formation
Finished Izoterm Izospan rolls
Finished Izoterm Izospan rolls
  • production control of weight and width
  • printed and unprinted options
  • UV-stabilised versions
  • 35, 50, 60 and 70 m² rolls

Let's work together

Become an official dealer or discuss another partnership format with MARVIK PARTNERS.

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