Stacking door systems occupy a distinct position between sliding and bi-fold systems — panels slide horizontally and stack behind a fixed panel or into a wall pocket, providing a wider clear opening than a standard sliding door without the folding mechanism of a bi-fold system. This makes stacking doors well suited to applications where a wide, unobstructed opening is desired but the ceiling or structural conditions don’t support a top-hung bi-fold track, or where a cleaner, more linear aesthetic is preferred over the folded panel stack of a bi-fold system. Hunter Windows supplies and installs stacking door systems from the AWS Elevate range, available in configurations to suit opening width, panel count and performance requirements.
Stacking door systems are commonly specified across:
System selection should account for:
Commercial Stacking Sliding Door (100mm Framing)
| Maximum Frame Height* | 2700mm |
| Maximum Panel Width* | 1350mm |
| Maximum Glass Thickness | ≤20mm |
*Maximum Frame Height and Panel Widths indicated are interdependent and subject to individual site conditions.
Commercial Stacking Sliding Door (150mm Framing)
| Maximum Frame Height* | 2700mm |
| Maximum Panel Width* | 1200mm |
| Maximum Glass Thickness | ≤20mm |
| SHGC Range | 0.22-0.67 |
| Uw Range | 3.2-6 |
*Maximum Frame Height and Panel Widths indicated are interdependent and subject to individual site conditions.
Thermally Broken Door System
| Maximum Frame Height* | 2800mm |
| Maximum Panel Width* | 2500mm |
| Maximum Glass Thickness | ≤28mm |
| SHGC Range | 0.16-0.45 |
| Uw Range | 2.6-3.4 |
*Maximum Frame Height and Panel Widths indicated are interdependent and subject to individual site conditions.
MAGNUM™ Stacking Sliding Door
| Maximum Frame Height* | 3000mm |
| Maximum Panel Width* | 2000mm |
| Maximum Glass Thickness | ≤24mm |
| SHGC Range | 0.22-0.67 |
| Uw Range | 3.0-6.2 |
*Maximum Frame Height and Panel Widths indicated are interdependent and subject to individual site conditions.
Residential Stacking Sliding Door
| Maximum Frame Height* | 2700mm |
| Maximum Panel Width* | 1350mm |
| Maximum Glass Thickness | ≤20mm |
| SHGC Range | 0.21-0.72 |
| Uw Range | 3.0-6.2 |
*Maximum Frame Height and Panel Widths indicated are interdependent and subject to individual site conditions.
Stacking door systems are WERS rated, providing verified U-value and Solar Heat Gain Coefficient (SHGC) data for use in NCC energy compliance calculations and thermal modelling.
Key energy performance factors for specification:
SHGC and U-value ranges for each series are shown in the Available Range section above. For detailed energy performance data and climate zone guidance, see our WERS & Energy Performance and Thermally Broken Frames resource pages.
Stacking door systems integrate across facade, sector and specification decisions:
Stacking doors slide horizontally like sliding doors but accommodate multiple panels that stack behind a fixed panel or into a wall pocket, providing a wider clear opening than a standard two-panel sliding system. Unlike bi-fold doors, panels do not fold — they remain upright and slide, which produces a cleaner linear aesthetic and avoids the need for a top-hung folding track. Stacking systems sit between sliding and bi-fold in terms of clear opening width and system complexity.
A wall pocket is a cavity within the wall construction that allows stacking door panels to slide fully out of sight when open. Wall pockets maximise the clear opening width and produce a seamless indoor-outdoor connection when the doors are fully open. They require early coordination between the glazing supplier, architect and structural engineer to ensure pocket dimensions, head clearance and structural support are correctly designed.
Series selection and threshold design are important considerations in exposed locations. Weather resistance performance varies across the range and track and threshold detailing is critical in coastal or wind-driven rain environments. Our team can advise on appropriate series and detailing for specific exposure conditions.
Both systems can provide wide clear openings, but they differ in mechanism, aesthetic and structural requirements. Bi-fold systems clear the full opening width by folding panels to the side but require a top-hung track and produce a stacked panel bundle at the edge of the opening. Stacking systems slide panels behind a fixed panel or into a wall pocket, producing a cleaner edge condition but requiring additional wall width or pocket space. The choice between systems depends on structural conditions, aesthetic preferences and opening width requirements.
Yes. Our team can advise on suitable series, panel configurations and wall pocket requirements for stacking door applications. Early engagement is recommended to ensure pocket dimensions and structural requirements are incorporated into the building design. Upload drawings or contact us to discuss your project.
For stacking door system selection, wall pocket coordination or to submit drawings for review, our team is available to assist.
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