ETFE (ethylene tetrafluoroethylene) is widely used for skylights because of its strong, transparent, and lightweight characteristics. To achieve optimal results when designing an architectural ETFE skylight, it is crucial to take into account several best practices. The following are key factors to consider:
1. Determine the desired level of light transmission.
ETFE has the capability to allow up to 95% of visible light to pass through, which makes it a perfect option for skylights. Nevertheless, the amount of light passing through can be controlled by incorporating additional layers or prints on the ETFE film, typically on the outer layer. Decide on the preferred level of light transmission for your skylight according to the requirements of the area beneath it and any concerns regarding glare or heat accumulation. Interested in experimenting with this? Check out our complimentary web application linked below:
2. Determine the desired thermal insulation of system U_value (W/k.m2).
The U-value in an ETFE system is influenced by various factors, with the number of layers being the most crucial. ETFE cushions usually consist of 2 to 5 layers, and the more layers there are, the lower the U-value. However, most applications tend to use 2 or 3 layers. To learn about other factors that affect the U-value of cushions, please visit our free web application page and calculate the U-value on your own:
3. Consider the structural loading and wind forces.
While ETFE is robust and long-lasting, it is crucial to take into account the structural loads and wind pressures that the skylight will endure. Make sure that the skylight is adequately supported and that the ETFE film is tensioned properly to withstand these forces, with particular attention to optimizing the width cushion to keep ETFE foil stresses within permissible limits. For further information on selecting the appropriate width, please visit our free web application page:
4. Plan for maintenance and cleaning.
ETFE skylights are relatively low maintenance, but they will still need to be cleaned and inspected periodically. Plan for easy access to the skylight for maintenance and cleaning and consider using a self-cleaning coating on the ETFE film to reduce the frequency of cleaning.
5. Evaluate the fire performance of the ETFE film.
ETFE has good fire performance properties, but it is important to evaluate the specific fire performance of the ETFE film that will be used in the skylight. Ensure that the film meets the required fire safety standards for your project. To know more about ETFE fire behaviour visit our free webapp page:
6. Consider the acoustic performance of the skylight.
ETFE skylights can transmit sound, so it is important to consider the acoustic performance of the skylight. If necessary, incorporate acoustic absorption materials or design features to reduce sound transmission.
7. Coordinate with other building systems.
Skylights can impact other building systems, such as HVAC, lighting, and shading. Coordinate with these systems to ensure that the skylight is properly integrated and that any necessary adjustments are made.
8. Consider the sustainability of the skylight.
ETFE is a sustainable material with a long lifespan and low embodied energy. Consider the overall sustainability of the skylight, including the choice of ETFE film, the manufacturing process, and the end-of-life disposal of the skylight.
Finally:
By following these best practices, you can ensure that your architectural ETFE skylight is well-planned and designed for optimal performance.
We hope this blog post was useful, what do you think about ETFE skylights? Please do let us know or communicate with us for more information.
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