Hydrostatic Pressure Testing of Membrane Laminates
topic
Hydrostatic pressure resistance testing per ISO 811 applies increasing water pressure at 10 centimetres water per minute to the fabric inner surface and measures the pressure at which three points of water penetration appear on the outer surface, with performance classifications of 1500 millimetres water column for light rain protection, 10000 millimetres for general waterproofing, and 20000 millimetres or above for extreme condition outdoor performance textiles.
Role
Provides the primary waterproofness performance measurement for membrane laminates that determines whether the product meets the waterproofing claims made for each performance category, with hydrostatic pressure being the standard international method for quantifying and communicating waterproof performance that enables objective comparison between products and verification of compliance with the technical specifications required for outdoor performance and protective textile applications.