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Thermosash Extruded & Composite Louvre and Fins


Thermosash have a variety of extruded sun louvre blades that range from 90mm up to 1200mm - all able to be integrated into our façade suites without the need for additional structure by other trades. The blade systems can be fixed or actuated via integrated BMS functions offering a high quality external building shade system that can lower the heat gain on your building and make it look great.

The added advantage of a Thermosash louvre system is you design it - Thermosash engineers it!

Where your design requires a bespoke solution, Thermosash can engineer a solution and as we manufacture at our premises in Auckland, Wellington and Christchurch can custom clad your blade with almost any durable material.

Product Features

  • Can be designed for light, glare, heat or aesthetics.
  • Fully integratable blades and connection systems.
  • Proprietary or full customisable. 
  • When incorporated into a Thermosash façade do not generally require additional structure and do not penetrate the wet zone of the façade - meaning no leaks. 
  • 100% New Zealand made.
  • Fixed or pivoted.
  • All systems engineered by our in-house structural and façade engineer.

Section Sizes

Refer our resource section for the full range of extruded louvre fins and blades.

Contact us to discuss your own design.


We recommend using Masterspec 4251TS Commercial Windows when specifying these systems.

Surface Finishing 

For all aluminum clad or extruded products, we recommend the following surface treatments:
Polyester powdercoat  - Both standard and special colours available.
Anodised - All anodised colours available - commercial grade 20 micron finish recommended.
PVF2 Flourocarbon finishes - Available on request.

Performance / Testing

  • AS/NZS1170 (Structural Design Actions)
  • NZS4223 (Glazing in Buildings)
  • NZS/AS4284:2008 (Water / Air Pressure/ Air Leakage - Meets and exceeds minimum requirements)

Maximum Spanning Ability

Thermosash specifically engineers the best suite option for your project taking into consideration span, structural system, and environmental loads (e.g. wind). The spanning ability will vary depending on the above. 

Thermosash Suites are recognized as having the largest spanning systems on the market due to our specific engineering capability and the customised nature of the work we complete.


The standard warranty is 5 years from the date of practical completion for these products. This covers workmanship and weather tightness, providing the subcontract includes fabrication, installation and glazing of all components. 

Downloads Available 
Please go to our resource section or click below for the relevant downloads: 
Extruded louvres fins and blades

For window system that these can integrate with seamlessly, please see the following suites and specifications:

Delta Commercial windows  /  
Masterspec 4251TS Commercial Windows
or Unitised systems  /  Masterspec 4211TS Curtainwalling

Also refer to
Thermosash Shadegrate™ and Treadgrate™ systems


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