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CW900 - Granite Wall


The CW900 series "granite" wall is similar in many respects to the CW400 series curtainwall, which is a high performance American pressure glazed stick curtainwall system. It has been a leading system (four-sided, mechanically entrapped) in the USA. It lends itself to automated production and is extremely fast to erect on site (2 floors at a time) from inside the building. Each stage of erection and glazing can be easily inspected to prevent any leaks occurring in the finished curtainwall and the building can be closed in and made water-proof in a mill finished state.   

It is erected on site in mill finish material and the anodised or paint finish external and internal trims are fitted at the end of the contract to avoid marking or damage. The internal trims need not be in the same finish as the external trim. 

The system incorporates neoprene gaskets fully moulded at the corners and with internal tubular gaskets to give a controlled pressure to the glass over the total perimeter. All glazing is carried out from the inside (depending on design application).

Product Features

  • A complete drainage system is incorporated to drain water at every lite. 

  • All internal aluminium covers, cills and head trims are isolated from exterior aluminium against the transfer of heat or cold by the use of PVC isolators, giving a complete thermal break. The work is erected and glazed using mill finish aluminium. 
  • A very wide range of glass and panel thicknesses can be accomodated in the design and opening vents can be incorporated, should this be neccesary. The system, which is designed to span two floors, sets out to use the minimum amount of aluminum to meet the design requirements of the specification or specific aesthetic demands.

Section Sizes

100 / 150mm Mullions
100 / 150mm Transoms


We recommend using Masterspec 4251TS Commercial Windows when specifying this suite.

Surface Finishing 

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)
  • NZS4211 (Performance of Windows)
  • 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 :
CW900 - Granite Curtainwall
Masterspec 4211TS Thermosash Curtainwalling