This European Standard specifies the determination of flexibility of reinforced bitumen sheets at low temperatures. Sheets without reinforcement can also be tested using this standard.
The test is carried out on the upper and lower faces of the sheet either at a predetermined temperature or successively at different temperature steps to determine the cold bending temperature which represents a limiting temperature. Therefore the test can be used to confirm a minimum cold bending temperature for a product or to determine the specific cold bending temperature for the product, e.g. to determine the change of these properties as a result of artificial ageing.
BS EN 1109:2000 history
2013BS EN 1109:2013 Flexible sheets for waterproofing. Bitumen sheets for roof waterproofing. Determination of flexibility at low temperature
2000BS EN 1109:2000 Flexible sheets for waterproofing - Bitumen sheets for roof waterproofing - Determination of flexibility at low temperature