Cooling Brothers Expands IGU Line to Triple Glazing — Available Nationally

Triple Glazed IGUs Join the InsulCool Range — Available Nationally

The Forel IGU line at Cooling Brothers' Perth facility was designed from the outset with triple glazing capability. CNC spacer extrusion, automated stepped unit processing, and the thermoplastic applicator that makes the KÖDISPACE 4SG system possible are all inherent to the line's architecture — triple glazing is the latest natural extension of that manufacturing platform.

Triple glazed units introduce a third glass pane and a second sealed cavity, typically argon-filled, delivering a step-change reduction in U-value over double glazing. Where a high-performance double glazed InsulCool unit addresses the thermal requirements of most commercial and residential projects under NCC 2022, triple glazing is positioned for applications where those requirements are not the ceiling — where design intent, project brief, or climate zone demands performance beyond current code minimum.

KÖDISPACE 4SG: Eliminating Thermal Bridging at the Edge Zone

The edge zone is the thermal weak point of any IGU. Conventional aluminium spacers conduct heat directly across the glass edge, undermining centre-pane performance with a consistent perimeter cold zone — and in a triple glazed unit with two cavities, that edge zone effect is compounded.

The KÖDISPACE 4SG system, engineered by Kommerling in Germany, addresses this structurally. It is a chemically bonded, reactive thermoplastic spacer extruded directly to the glass surface via CNC, incorporating the desiccant within the polymer matrix itself. The chemical bond to both the glass surface and the silicone sealant creates an integrated edge seal — there is no dislocation of the spacer during deflection, which matters particularly in structurally glazed or high-load applications. The matrix has a service temperature range to +90°C and is rated for long-term UV and weathering exposure.

For specifiers and facade engineers, a triple glazed unit with aluminium spacers delivers a materially different thermal outcome to one built with the 4SG system — particularly at the edge zone, and particularly in the condensation and thermal comfort performance that building occupants register at the perimeter of the glazing.

Zero Argon Gas Leakage

Argon fill is a core component of IGU thermal performance. In a conventional spacer system, gas retention relies on mechanical compression — a failure mode that degrades over time and is the primary cause of long-term performance loss in double and triple glazed units.

The KÖDISPACE 4SG system eliminates this risk. The chemical bond between the polymer matrix, glass surface, and silicone sealant creates a permanently sealed cavity with no reliance on compression for gas tightness. In a triple glazed unit, this applies across both argon-filled cavities — the thermal performance delivered on day one is the thermal performance the unit retains across its service life.

For projects where the glazing specification is driven by NCC 2022 compliance modelling, Green Star energy credits, or a passive house brief, long-term gas retention is not a minor detail. It is the difference between a unit that performs to specification over decades and one that does not.

NCC 2022, Climate Zone 7 and Triple Glazing

Triple glazing is the right specification where one or more of the following conditions applies:

• Climate zone 7 and alpine applications — extreme cold-climate projects where minimum U-value targets cannot be met with double glazing at the required glazed area
• Passive house and near-zero energy building briefs — where the whole-of-envelope thermal target demands the lowest achievable U-value from the glazing
• Acoustic performance stacking — triple glazing provides an additional mass barrier and decoupled air gap, relevant where acoustic and thermal performance requirements coincide on the same facade element
• High-rise residential facades — where NCC 2022 Section J compliance on larger glazed areas in cooler climate zones drives the specifier to a higher-performing unit
• Projects pursuing Green Star or NABERS commercial ratings — where glazing contributes to credit points and the energy modelling supports a triple glazed specification

In each of these contexts, the combination of three-pane construction and the KÖDISPACE 4SG warm-edge system produces measurably different thermal outcomes at both the centre-pane and edge zone.

Triple glazing is not the correct specification for every project, and Cooling Brothers' technical team will be direct about that. The InsulCool Ultra series already covers the performance range required for NCC 2022 compliance across Australian climate zones in double glazed configurations, and for most projects in zones 3 through 6, the Ultra Series range will have an appropriate performance solution.

Triple Glazing Manufactured in Perth, Supplied Nationally

Triple glazed units are manufactured at Cooling Brothers' High Wycombe facility and available for supply across all Australian states. Units are produced up to a maximum panel size of 2480x4000mm with a maximum overall thickness of 85mm, accommodating the panel dimensions typical of commercial facade, high-rise residential, and large-format architectural applications. As Australia's only nationally integrated glass processor, Cooling Brothers supplies fabricators in Western Australia, Victoria, and New South Wales — through its Perth, Epping, and Sydney operations respectively — with consistent product specifications regardless of destination market.

For Victorian fabricators and projects in Melbourne's cooler climate zones, triple glazing is now directly accessible through the Cooling Brothers national supply chain. The same applies for NSW projects supplied through Bent & Curved Glass, part of the Cooling Brothers Group, in Revesby.

Lead times and configuration options — including glass substrate selection across the InsulCool Ultra series, argon fill specifications, and stepped or shaped unit requirements — are available from the technical sales team.

Enquire about InsulCool Triple Glazing

Contact the Cooling Brothers technical sales team to discuss triple glazed unit configurations, performance data, or project-specific requirements. Explore the InsulCool Ultra Series or call 1300 040 799 to speak with a member of the team.