PTFE-coated glass fabric PTFE - Polytetrafluorethylene This membrane consists of a high-quality glass fibre fabric with a fluorpolymer coating. Fluorpolymer based materials are ideally suited to high-quality permanent roofs and facades, in particular if a maximum life ex-pectancy, fire class and a first class aesthetic appearance with a self-cleaning surface is required. Many of the most prominent membrane projects worldwide have been built from this fabric. The high tensile strength of the material allows wide span structures to be built, and it is mainly used for permanent tensile or pneumatic structures. Detailed characteristics: Life span: Life expectancy is 25 30 years. Due to the molecular structure of the coating, the material is extremely resistant to aggressive environmental conditions, and therefore shows an excellent technical and visual longterm performance. Fire rating: The material is incombustible and it achieves the highest requirements of any of the coated membrane materials used for tensile structures. PTFE coated fibreglass fabric resists temperatures of 260ְC without considerable loss in strength. Cleaning: The self-cleaning effect is achieved by the non-stickӔ surface and any dirt accumulated on the surface will be washed off by rain. Cleaning is not necessary under normal conditions. Any accumulated dirt will be washed off by normal rain, if the shape and the connection details are de-signed correctly. However, depending on the clients requirements and the location of the structure, it may be necessary for some cleaning to be carried out. Cleaning is carried out using ecologically ґgreen deter-gents. Maintenance: Compared to traditional cladding or roofing materials membranes are almost maintenance-free. However, inspections are still recommended in order to find defects, (for example damage caused by mechanical impacts of sharp objects), and to identify and repair such damage as early as possible. It is also recommended that the perimeter clamping system and the primary structure are regularly inspected. >

The inspections should normally be carried out annually. However, the specific intervals need to be as-sessed on a project by project basis. Environmental compatibility: The membrane manufacturers are working on recycling processes and are already accepting some material returns as the storage volume is extremely low (1000 m = 1 mҳ). The clamp details (mainly aluminum clamp plates) can be easily separated from the membrane and can be 100% recycled. Further details: The light transmission depends on the material thickness and is in the range of 5 25 %. A uniform light level of 5 % is by far sufficient...