Wind-stable external venetian blinds remain usable for longer, even in windy conditions, thereby contributing to energy efficiency. They are particularly suitable for tall buildings and windy regions and are designed for up to wind force 10, depending on the design.

Wind-stable external venetian blinds are more robust and remain usable for longer when it gets windy. This protects the external venetian blinds and helps to continue shading rooms even on windy hot days. In planning, the guidance, installation, and slats are crucial—not just a "thicker material".

Robust sun shading and visual privacy even in wind

  • Shading often remains possible for longer in wind
  • Protection against damage because the unit is guided stably
  • Sensible for windy regions and taller buildings

Wind-stable means: The external venetian blind is designed to be safely operated up to defined wind speed limits.

These limit values depend on:

  • System size (width/height)
  • Guidance (e.g. guide rails)
  • Installation location (e.g. wind-exposed position)
  • Slat design

Guide rails and installation in the reveal

The more "firmly" the unit is guided and the more protected it sits, the quieter the slats and end rail run in gusts. Therefore, stable lateral guidance is central for high wind stability. Installation in the reveal with guide rails is considered a factor for maximum wind stability.

Slat geometries

Slats differ in shape and stiffness. This affects how calm the external venetian blind remains in wind. The Windra flat slat is a particularly wind-stable slat, for example.

Important: Even wind-stable systems should be lowered in case of a storm. Automatic wind monitoring reduces the risk when wind suddenly arises.

Our reporter Toni has set out to answer this question. To do so, he met with our colleague Lukas from Development to find out more about the top quality of our external venetian blinds. Toni gained an intriguing insight into how we test our products and what happens when WAREMA external venetian blinds are exposed to strong gusts of wind. Check out the results for yourself on a company visit with Toni!

If you're hit by strong winds or storms, you should retract your external venetian blinds to avoid damaging your sun shading system. If your units are connected to a smart control system , this process can be fully automated and take place when you aren't home. The wind force as of which it is necessary to raise your external venetian blinds depends on the structure of your external venetian blinds and on the installation location (for locations exposed to wind). Special wind-stable external venetian blinds can be used up to wind force 10. Thanks to installation in the reveal of the guide rails, you receive top wind stability. The retrofitting or installation is possible at a later time in many cases. Contact a WAREMA Partner for advice.

The wind stability of external venetian blinds depends on several factors, including the size of the units, their material, the quality and design of the fixing and installation. The WAREMA Windra flat slat is a particularly wind-stable slat.

Visit us at one of our Sunlight Experience Centres or contact your local specialised retailer directly to get a quote for your own customised external venetian blinds. You can find an overview of the best qualified specialists in your region here. At the listed companies, you can not only buy a custom-made external venetian blind from WAREMA, but you will also receive outstanding service, including expert advice, professional installation and reliable after-sales management.

Venetian blinds

External venetian blinds with flat slats

Electric venetian blinds

Slat cleaning tools

Slat geometries

The WAREMA brand stands for high-quality sun shading solutions that adapt flexibly to your life. As a leading European manufacturer, the family-owned company develops individual solutions for windows, patios, balconies and outdoor areas. The portfolio ranges from external venetian blinds and roller shutters to awnings and patio roofs, as well as insect screens and intelligent sun shading control systems. In cooperation with qualified specialist companies, all solutions are carefully planned and professionally installed on site. You benefit from long-lasting quality, reliable service and enhanced comfort – for a harmonious interplay of light, shade and living space, today and in the future.