Compliance work

Overall migration Sensory analysis

specific migration

Material analysis

Mechanical properties

permeation

PPWR/ Recycling

Water vapour transmission rate (WVTR)/ Sd- value (water vapour diffusion-equivalent air layer thickness)

Determination of the Sd value according to the gravimetric method on diffusion open and diffusion inhibiting materials with Sd values of approx. 0.03- 10 m ( equivalent to a WVTR of approx. 4- 800 g/(m²xd) depending on the material and test conditions) as a quintuple determination. For diffusion-inhibiting, diffusion-blocking and diffusion-proof materials with Sd values of approx. 10- >1500 m (corresponds to a WVTR of approx. 0.005- 125 g/(m²xd) depending on the material and test conditions), we recommend the more rapid and more cost-effective electrolysis method (then deviating from the standard as a double determination).

Test Method Group: permeation

Norms:
  • DIN EN 1931 (2001-03) Flexible sheets for waterproofing – Bitumen, plastic and rubber sheets for roof waterproofing – Determination of water vapour transmission properties
  • DIN 53122-1 (2001-08) Testing of plastic and elastomer films, paper, board and other sheet materials – Determination of water vapour transmission – Part 1: Gravimetric method
  • DIN EN ISO 12572 (2025-03) Hygrothermal performance of building materials and products – Determination of water vapour transmission properties – Cup method
  • DIN EN ISO 15106-3 (2005-05) Plastics – Film and sheeting Determination of water vapour transmission rate – Part 3: Electrolytic detection sensor method

Required Sample Amount: optimum: 5 DIN A 4 sheets without folds, creases or other damages

Standard Tests

WVTR/ Sd- value breathable materials

Specific Norm: DIN EN ISO 12572

Determination of the Sd- value (water vapor diffusion equivalent air layer thickness) of building materials and products, which used as permeable (breathing) materials, gravimetric measurement according to DIN EN ISO 12572 / DIN EN 12086 (suitable for Sd-values in the range of approx. 1 - 100 m).

WVTR / Sd value water vapour barrier materials

Specific Norm: DIN EN 1931

Determination of the SD value (water vapor diffusion equivalent air layer thickness) of building materials and products that are used as vapor barrier, electrolytic measurement according to ISO 15106-3 (suitable for Sd-values in the range of approx. 50 - >1500 m).
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