Geotextile permittivity
Cross-plane water-flow response normalised to hydraulic head under defined test conditions; distinct from in-plane drainage response.
Material family: Construction, roofing and geosynthetics
Where it matters
Use in the related guide and exact application brief.
Testing and verification
State the current method, specimen, exposure and reporting basis; independent claim-level review remains open.
Related guides
Related products and materials
General information for preliminary evaluation; not independently reviewed or certified. Confirm grades, standards and suitability with the manufacturer for your application. Interpret within the exact material, grade and test method.