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DIN EN 1928:2000
Bitumen, plastic and rubber sheets for roof waterproofing - Determination of watertightness; English version of DIN EN 1928
The document applies to factory made bitumen, plastic and rubber sheets for roof waterproofing and specifies procedures for determining the watertightness in particular, the resistance to ponding water or to hydraulic pressure absorbed by a limited part of the surface.
Deutsches Institut für Normung [din]