Large Glass Skylight Mullion - GXLM
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7-Year Warranty
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Large Glass Skylight Mullion - GXLM
The Skyspan GXLM Mullion Skylight is the ideal solution when your vision exceeds a single pane.
Built on the same thermally broken, self-draining system as the Skyspan GXL range, the GXLM allows for larger spans and modular layouts using one or more structural mullions.
Each unit combines architectural clarity with engineering precision—enabling custom configurations up to 6400 mm (L) × 2400 mm (W) while maintaining the clean lines and performance of a continuous glass roof.
Thermal Break System
The GXL incorporates a thermally broken, self-draining frame system engineered to reduce thermal bridging and support Section J and NatHERS performance requirements.
An integrated condensation gutter and weep-hole drainage system manages moisture at the frame, improving durability and preventing internal water ingress.
Key Benefits
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Thermal Break Frame — reduces heat transfer and helps maintain interior temperature stability.
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Condensation Management — gutter and weep holes control moisture and protect internal finishes.
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Energy Performance — improves thermal efficiency and reduces HVAC load in conditioned spaces.
Glazing Options
Tint Options
Custom tinting options and Ceramic Frit Patterns also available. Above images are for illustrative purposes only—actual tint colors may vary due to lighting and screen display.
| Glazing | U-Value | SHGC |
|---|---|---|
| Centre of Glass Values: | ||
| Single Glazed (Clear) | 3.6 | 0.63 |
| Double Glazed (Clear) | 1.3 | 0.27 |
| Double Glazed (Grey Tint) | 1.3 | 0.26 |
| Double Glazed (White Translucent) | 1.3 | 0.24 |
| System Values: | ||
| Double Glazed (Clear) | 2.7 | 0.25 |
On a project specific basis, higher performance energy ratings up to SHGC 0.18 are available for maximum width of 2,000mm & maximum length of 3,500mm
| System Type | Large-format thermally broken architectural glass skylight |
| Frame Construction | Welded aluminium frame with integrated thermal break |
| Drainage System | Self-draining design with condensation gutter and 6 mm weep holes |
| Trafficable Use | Trafficable for cleaning and maintenance (AS1288 Section 6) |
| Roof Pitch Suitability | 3° – 60° (5° minimum recommended for water runoff) |
| Flashing Material | 0.75 mm Zincalume® (standard) or Stainless Steel / Colorbond® Ultra |
| Finish Options | Powder coated to any Colorbond®, Dulux or Interpon colour |
| BAL Rating | BAL-29 compliant (non-combustible aluminium, steel and glass) |
| Wind Region | Tested to Cyclone Region C3 (AS4285 Debris Impact Test) |
| Compliance Standards | AS 4285:2019 – Rooflights AS 1288:2021 – Glass in Buildings AS 3959:2018 – Bushfire Construction AS/NZS 1170 Series – Structural Design Actions |
| Warranty | 7 Years (manufacturing defects) |
| Made In | Australia |
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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