Products covered by this service
- Vapour control films
- Façade wind barriers
- Diffusion-open roof underlays
Why conformity assessment matters
An unsuitable layer can trap moisture in the building envelope. When reviewing Order No. 435 applicability, we consider membrane composition, structure and function rather than its trade name alone.
Certificate or declaration: the document depends on the specific product and applicable regulation.
Understand the regulationProperties considered in the assessment
- Water vapour transmission by the selected method
- Tensile and tear strength
- Water resistance and performance stability
These are programme-selection considerations. Required tests depend on the specific product, standard and conformity assessment scheme.
Standards to consider
Examples are shown with their scope. A catalogue listing does not make a standard mandatory for every product in this group. The applicable edition and regulatory link are checked for each request.
Details to clarify
GOST 25898-2020 provides water vapour permeability methods for building materials. Method suitability for the particular membrane must be checked.
