Top torch-on polymer bitumen membranes
Flat roofs are subject to particularly exacting requirements because of the high temperatures and mechanical stresses they are exposed to. Bitumen membranes with particularly durable reinforcements and specially modified bitumen compounds satisfy these exacting requirements. By adding synthetic materials such as SBS or APP to the bitumen, the largest possible plasticity ranges can be achieved. BauderKARAT has a plasticity range of 190°C, which makes it ideally suited for use as a waterproofing capping sheet.Worth knowing ...
What is the plasticity range?Bitumen membranes for roof waterproofing are evaluated in terms of their heat resistance and cold bending. Tests are carried out in the lab to determine the temperature at which the upper bitumen coat starts to slide off the bitumen membrane. This temperature defines the heat resistance. The low temperature range of the waterproofing membrane is determined by its cold bending properties. This is done by cooling the membrane in liquid and bending it around a metal rod. The response of the bitumen is assessed. The temperature range between heat resistance and cold bending is the plasticity range.