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
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.




A series — vapour-open wind and moisture protection for the outer layer
Select a material by its position and task in the assembly, not by the letter in its name alone.
The vapour-open wind and moisture layer helps vapour leave the insulation while shielding the assembly from external moisture and air movement.
The vapour-control layer limits humid indoor air from entering the insulation and structural layers.
The final layer build-up and installation method must follow the project design and applicable building regulations.
Moisture management on both sides of the thermal insulation.
Exterior wind protection and interior vapour control.
Protection for the insulation against air movement and external moisture.
A protective layer behind the facade cladding.
Reduced moisture exposure for insulation and timber elements.
Control of vapour and moisture movement for the service conditions.
A reliable solution comes from the coordinated performance of every layer, not from a single roll in isolation.
This page provides general guidance. Final selection must be based on project calculations and the manufacturer's technical documentation.
The production line covers polymer web formation, layer bonding, slitting, winding and packaging of the finished material.



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