Beaded external venetian blind slats are profiled aluminium slats with roll-formed, reinforced longitudinal edges. Within the range of external venetian blind slat types , this geometry provides dimensional stability, a characteristic curved appearance and adjustable daylight control. Suitability depends on the complete blind, guidance, dimensions and wind-load requirements.

The folded edges stiffen the slat and define its curved cross-section. When installed in a compatible external venetian blind, the slats can be tilted to adjust daylight, glare, view out and privacy.

Closing behaviour, permissible wind load and stack height depend on the slat width, guidance, unit dimensions and selected product.

  • Reinforced profile: the roll-formed edges increase the stiffness of the aluminium slat
  • Adjustable daylight: the slat angle controls direct light and glare
  • View and privacy: intermediate positions allow a project-specific balance between view out and screening
  • External solar shading: correctly positioned slats can reduce solar radiation reaching the glazing; the effect depends on the building and operation

Beaded slats have roll-formed edges along both longitudinal sides. The reinforced edges stiffen the aluminium profile and create the characteristic slightly curved shape used in many external venetian blind systems.

A beaded slat is formed from an aluminium strip whose longitudinal edges are folded into a reinforced profile. This process is also described as roll forming or edge beading.

Effects of the profile

  • the reinforced edges increase slat stiffness
  • the defined cross-section supports consistent alignment and closing behaviour
  • the curved profile creates the characteristic appearance of this slat type

Beaded slats can be considered when a project requires:

  • a curved, established external venetian blind appearance
  • adjustable daylight, glare and privacy
  • a reinforced slat profile within a compatible wind-load configuration
  • a versatile slat type for residential or commercial façades

Final selection must consider dimensions, guidance, fixing, wind exposure and required dim-out.

Beaded slats are used in selected wind-resistant external venetian blinds because their reinforced edges increase profile stiffness. The permissible wind load still depends on the complete product, dimensions, guidance, fixing and installation position.

Beaded slats primarily provide adjustable daylight and privacy. For stronger room dim-out, dim-out external venetian blinds use a different closing geometry and sealing concept. Neither option should be described as complete blackout without a project-specific assessment.

WAREMA offers flat, beaded and dim-out profiles among its external venetian blind slat types . Each slat type has different characteristics for appearance, stack height, daylight control, closing behaviour and compatible systems.

You can view products and operating options at Sunlight Experience Centres or contact a WAREMA specialised retailer. The retailer can assess the installation, take measurements, prepare a quotation and arrange professional installation and service.

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.