OSB Airstop

OSB Airstop core is OSB 3 described by EN 300 standard as OSB 3 type (load-bearing board for use in humid conditions). It is formed by a special press with high temperature and a special film applied on the unsanded OSB board. It reduces the differences in the boards’ heterogeneity therefore giving the precise defined values of airtightness and water vapour transmission. In the diffusion-open structures this allows the installation of reinforced sheathing, airtight barrier and water vapour check in one step. OSB Airstop focuses closely on the needs of current construction trends of modern low-energy and, in particular, passive houses which have higher requirements for airtightness of building envelope.


- Increased resistance to humid conditions
- High load-bearing capacity and stiffness for construction purposes
- High dimensional accuracy and shape stability
- High flexibility and impact resistance
- Easy workability with common woodworking tools
- Airtightness
- Environmentally friendly, recyclable product


- Internal non-load-bearing cladding of walls and ceilings, partitions
- Structural roof decking
- Load-bearing for ceilings and roofs
- Sub-floors and base boards for flooring systems
- Attic conversions or extensions


EN 300 - type OSB 3; EN 13501-1: class D-s1, d0; EN 13986:2004+A1:2015

Emission Class

E1 (EN ISO 12460-5)

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