This European Standard specifies a method to test the resistance against water penetration of underlays for discontinuous roofing and for walls.
BS EN 13111:2001 history
2010BS EN 13111:2010 Flexible sheets for waterproofing - Underlays for discontinuous roofing and walls - Determination of resistance to water penetration
2001BS EN 13111:2001 Flexible sheets for waterproofing - Underlays for discontinuous roofing and walls - Determination of resistance to water penetration