Kōata Tioata – Crystal Glass

Here at Hagley Windows and Doors, we are New Zealand window glazing specialists. We know the climate and specialise in providing the right solution for your home.

What is Kōata Tioata – Crystal Glass?

Kōata Tioata – Crystal Glass is a superior solar control glass, more efficient than Low E and ideal for preventing overheating in homes and buildings that would otherwise be subjected to extreme heat due to the large size of their windows, or their predominantly north-westerly aspect.

Where does the name come from?

Glass, with properties akin to takiwai pounamu, was brought to us through the natural elements of Papatuanuku (Mother Earth) and fire from Ruamoko (God of volcanoes and earthquakes).  We can relate this particular glass to two of our Ngai Tahu Mauka (mountains) that are very rich in crystals with their healing and protective properties, Te Kiekie (Mount Somers) in the south, and Mount Tarewa (Torlesse), just beyond Oxford which provides a visual barrier between the Canterbury Plains and Kura Tawhiti (ancient place of learning), a sacred Ngai Tahu site just before Castle Hill on the way through to Arthur’s Pass.

Industry leading technology

All glazing from Hagley comes with the added addition of warm edge spacer technology at no extra cost. The TriSeal Super Spacer we use is one of the most advanced solutions available in terms of optimised energy savings, substantially reduced perimeter condensation and because of its application method is very straight compared to other ‘thermal’ solutions.

The properties and performance characteristics of this spacer are so good it receives Passive House phA+ certificate for Artic Climate. This greatly assists in eliminating the weak point of insulated glass units in an industry dragging the chain still using aluminium spacers.

Benefits and applications

The unique properties of Kōata Tioata – Crystal Glass make it suitable for residential and commercial buildings, where excellent solar control and high light transmittance is desired.  The effectiveness of glass for infrared radiation control is measured as a G-Value. The lower the G-Value, the more radiation resistance the glass has, and the more effective it will be.

An un-treated (standard) double glazed unit has a G-Value of around 1.3, whereas a double glazed unit comprising Kōata Tioata – Crystal Glass, provides a much lower G-Value of around 0.37.