DS EN 1297:2004 Flexible Sheets For Waterproofing - Bitumen, Plastic And Rubber Sheets For Roof Waterproofing - Method Of Artificial Ageing By Long Term Exposure To The Combination Of Uv Radiation, Elevated Temperature And Water Defines the method for exposure of factory made bitumen or plastic or rubber sheets for roof waterproofing to combined effects of long term exposure by UV radiation, elevated temperature and water as