EN 1850-1:1999 Flexible sheets for waterproofing - Determination of visible defects - Part 1: Bitumen sheets for roof waterproofing
EN 1850-2:2001 Flexible sheets for waterproofing - Determination of visible defects - Part 2: Plastic and rubber sheets for roof waterproofing
GOST EN 13416-2011 history
2011GOST EN 13416-2011 Roofing and hydraulic-insulating flexible bitumen-based and polymeric (thermoplastie or elastomer) materials. Rules for sampling