Both systems provide some capabilities like thermal insulation or light translucency.
Etfe roof disadvantages.
Since the first application of etfe in construction at the burges zoo in 1982 etfe roofing has gradually gained market share and is now successfully used in several buildings.
Properties change with temperature.
Developed over 40 years ago by dupont etfe has similar light transmission to glass but at just 1 of the weight.
The most used technology consist of two or more layer inflated with dry air.
Share this post.
Metal roofs are a significant investment for homeowners.
Disadvantages of etfe foil.
Etfe is a very flexible material and is able to cope with large deformations before breakage.
Elongations of 200 300 are possible.
As being prestressed it can accomodate the live loads.
They are called etfe cushions.
Not as transparent as glass.
In the unlikely case of a power failure the air handling unit will cut out.
Etfe cushions are finally being recognized as a striking piece of architecture in themselves not just being chosen to form roof structures and rooflights they can be used to create striking canopies.
There is no doubt in the fact that glass is the most clear most transparent material but there are many other disadvantages that are associated with this material.
Disadvantages of etfe foil.
The cushions are kept continually inflated at a predefined pressure by a small air handling unit or ahus connected to a control panel which inflates monitors and maintains the pressure in each individual cushion.
Cushions distort the view.
Materials can range from 7 00 to 9 00 per square foot and the installation of a metal roof can cost between 21 000 to 50 000.
Ethylene tetrafluoroethylene etfe is a fluorine based plastic polymer that offers a creative and lightweight alternative to glass.
Creep is very high.
Blurring the division between the inside and the outside somewhat they are as much a feature in themselves as a method of construction.
Disadvantages of metal roofing.
A photo journey of etfe architecture quickly dispels the notion that this is a simple plastic cladding material you might put over your roof or boat on a rainy day.
Benefits of an etfe roof etfe has started ruling the world of transparent materials which once glass was.
The crystallinity of etfe ranges from 40 to 60 and it has a melting temperature of 225 300 c depending on the comonomer ratio and the processing method further the ratio of the two monomers are varied to obtain several grades of etfe with optimized properties for specific end applications.
Relatively weak for a membrane material.
Etfe copolymers are basically alternating copolymers and in the molecular formula they are.
