Heavy Duty Sliding Doors

Product Description

Heavy Duty or Oversize Sliders offer increased Architectural opportunity. Thermosash suite sections allow for large sliders, single or multiple stacking. These are commonly specified where vehicle or over height access is required into a building for example car sales yards and convention centres.

The hardware systems that Thermosash allows for offers easy sliding or integration of automated door opening gear where required and high loading / trafficability over the sliding tracks.

Low-Carbon Aluminium heavy duty sliders

Thermosash partners with a local NZ-owned extruder achieving a lower carbon footprint than the global average - offering reduced upfront carbon emissions. (find out more about our Sustainable Aluminium).

Aluminium is 100% recyclable and all aluminium from refurbished sites and from our manufacturing process is environmentally managed back to our key suppliers and processed back into raw billet form.

Frame Size

An example of one of the largest glazed sliding doors we have installed is located at the Viaduct Events Centre in Auckland measuring 4mtrs x 4mtrs. The limitation is generally with maximum transport loads and glass weight, however larger doors can be transported CKD and assembled on site where necessary.

The stile section for the over-sized sliding doors is generally 100mm and is capable of receiving double glazed units up to 24mm. Depending on the door size and other environmental factors such as wind - stiffeners may be required.

Please Contact Us to discuss your requirements.

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 10 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, and the maintenance schedule is adhered to.


Maintaining glass, metals and stone are all particular to the environment that they are placed in: eg. marine, environmental pollution, exposure to natural washing, etc.

It is recommended by almost all material suppliers that building washing should occur every 3-6 months to prevent staining to glass and prevent environmental pollutants from corroding metals and to maintain the material warranties.

A full maintenance manual is provided on completion of a project for all the elements integrated within a project. Compliance to a maintenance schedule is essential to maintaining the quality of the installed product over time. Using Thermosash-approved facade maintenance contractor/personnel ensures the highest standards are met.

Read more Read less

Key Features

  • Suite options unique to Thermosash and bespoke engineered
  • Options integrate with all Thermosash suites
  • Can be manual or automated sliders
  • Hardened metal track hardware to take door load


We recommend using Masterspec 4521TS Commercial Windows when specifying this suite.


  • Polyester powder coat - both standard and special colours available.
  • Anodised - all anodised colours available - commercial grade 20 micron finish recommended.
  • PVF2 Fluorocarbon finishes - available on request.