Aluminium Stacker Doors

Aluminium Stacker Doors

Custom Aluminium Stacker Doors for Wider Indoor–Outdoor Openings

Aluminium stacker doors use multiple sliding panels that collect behind one another, allowing a greater proportion of the doorway to open than a conventional two-panel sliding door.

They are an excellent option for Australian homes and commercial buildings where the design calls for natural light, large areas of glass and a strong connection between indoor and outdoor spaces.

EZ Windows supplies custom aluminium stacker doors for:

  • New homes
  • Renovations
  • Luxury residences
  • Townhouses
  • Apartments
  • Volume-building developments
  • Alfresco areas
  • Patios and courtyards
  • Hospitality venues
  • Schools and community buildings
  • Offices and commercial projects

Aluminium stacker doors can be manufactured in multiple configurations with single glazing, double glazing, thermal-performance framing, flyscreens, retractable screens, security screens and architectural powder-coat finishes.

Important: Door selection, dimensions, glass, structural performance, installation, threshold design, drainage and compliance must suit the specific project. EZ Windows manufactures or supplies products according to approved information and the agreed scope.

What Is an Aluminium Stacker Door?

An aluminium stacker door contains multiple glazed panels that slide horizontally along separate tracks.

As the door opens, one moving panel engages another so the panels collect or “stack” behind a fixed panel or at one side of the opening.

A common three-panel stacker door contains:

  • One fixed panel
  • Two sliding panels
  • Multiple tracks
  • Interlocking panel profiles
  • Rollers
  • Handles and locking hardware

Other configurations can use additional panels or open from the centre, subject to the selected framing system.

How Does a Stacker Door Work?

The first sliding panel moves along its track. As it continues opening, it collects the next panel so both moving panels stack behind the fixed panel.

This allows a larger clear opening than a conventional two-panel sliding door of the same overall width.

Smooth operation depends on:

  • Suitable panel sizes
  • Correct glass selection
  • Rollers rated for the panel weight
  • Accurate manufacturing
  • A level and adequately supported sill
  • Correct frame alignment
  • Clean tracks
  • Appropriate installation
  • Regular maintenance and adjustment

What Is the Difference Between a Sliding Door and a Stacker Door?

Both systems use panels that move horizontally.

The main difference is the number and arrangement of the sliding panels.

Conventional Sliding Door

A standard two-panel sliding door usually has one fixed panel and one sliding panel. When opened, the moving panel overlaps the fixed panel.

Stacker Door

A stacker door usually has at least three panels. Two or more panels slide and collect behind another panel.

This means a stacker door can provide a wider clear opening relative to its overall size.

Read our complete Aluminium Sliding Doors Guide.

Benefits of Aluminium Stacker Doors

Potential advantages include:

  • Wider clear openings
  • Strong indoor–outdoor connection
  • Large areas of glass
  • Abundant natural light
  • Space-efficient sliding operation
  • Flexible multi-panel configurations
  • No hinged-panel swing area
  • Single- and double-glazing options
  • Flyscreen and retractable-screen options
  • Extensive powder-coat colours
  • Residential and commercial applications

The final result depends on the selected system, panel sizes, glass, hardware, installation and building design.

Wider Access to Outdoor Areas

A stacker door can open approximately two panels of a typical three-panel arrangement, subject to the exact system and configuration.

This can create a broader connection between:

  • Living rooms and patios
  • Kitchens and alfresco areas
  • Dining rooms and courtyards
  • Family rooms and gardens
  • Apartments and balconies
  • Restaurants and terraces
  • Function areas and outdoor spaces

The exact clear-opening width should be confirmed from the approved door configuration rather than assumed from the overall frame size.

Space-Efficient Operation

Stacker-door panels move within their tracks and do not require the swing area associated with hinged or bifold panels.

This can make them suitable where:

  • Furniture is positioned near the door
  • External space is restricted
  • A patio or balcony is narrow
  • Hinged panels could interrupt circulation
  • A predictable opening path is preferred

Space is still required for the panels to collect at the nominated stacking end.

Large Areas of Glass

When closed, aluminium stacker doors can create a broad glazed wall with relatively slim vertical framing between panels.

This can provide:

  • Natural light
  • Garden views
  • Pool views
  • Coastal views
  • Connection to courtyards
  • Visual continuity between spaces
  • A contemporary architectural appearance

Orientation, glass and shading should be considered to manage solar heat, glare, privacy and internal comfort.

Where Are Aluminium Stacker Doors Used?

Stacker Doors for New Homes

New-home projects can coordinate the door, structural opening, floor levels and external drainage from the design stage.

Early planning should address:

  • Overall door size
  • Panel configuration
  • Stacking direction
  • Structural support
  • Internal floor level
  • External paving or decking
  • Threshold
  • Drainage
  • Flashings
  • Glass
  • Energy performance
  • Flyscreens
  • Window furnishings

Stacker Doors for Renovations

A stacker door can replace an existing door or be introduced into a newly enlarged opening.

Renovation work may require:

  • Structural alterations
  • Engineering
  • New lintels or beams
  • Existing-door removal
  • Opening preparation
  • Floor modifications
  • Flashings
  • Waterproofing
  • External drainage
  • Internal finishing
  • External making good
  • Painting
  • Electrical relocation

The door should not be ordered until the responsible parties have confirmed the approved structural opening and manufacturing dimensions.

Stacker Doors for Alfresco Areas

Stacker doors are particularly popular between living spaces and covered alfresco areas.

A successful design should coordinate:

  • Door opening width
  • Outdoor furniture
  • Traffic flow
  • Floor finishes
  • Weather exposure
  • Roof coverage
  • External falls
  • Drainage
  • Flyscreen system
  • Cooking smoke and ventilation
  • Window furnishings

A covered alfresco area can reduce direct weather exposure, but it does not remove the need for appropriate sill, flashing and drainage design.

Stacker Doors for Kitchens

A stacker door can connect a kitchen and dining area directly with an outdoor entertaining space.

Consider:

  • Kitchen island position
  • Door-handle access
  • Traffic paths
  • Outdoor cooking areas
  • Furniture placement
  • Flyscreens
  • Floor-level transitions
  • Wind exposure
  • Cleaning access

The stacking position should not conflict with cabinetry, curtains or circulation.

Stacker Doors for Apartments and Balconies

Stacker doors can provide a wider balcony opening without panels swinging into limited spaces.

Apartment projects may require closer attention to:

  • Wind pressure
  • Water penetration
  • Balcony drainage
  • Threshold height
  • Acoustic performance
  • Energy efficiency
  • Panel weight
  • Building access
  • Body corporate requirements
  • Future glass replacement
  • Cleaning

The selected system must be suitable for the approved project conditions.

Commercial Aluminium Stacker Doors

Commercial stacker doors may be used in:

  • Restaurants
  • Cafés
  • Hotels
  • Function centres
  • Offices
  • Schools
  • Community buildings
  • Display suites
  • Retail spaces

Commercial projects may require specialised framing, hardware, safety glazing, accessibility and operational performance.

The specification should identify the required:

  • Door system
  • Dimensions
  • Number of panels
  • Stacking direction
  • Glass
  • Finish
  • Locking
  • Screening
  • Threshold
  • Structural performance
  • Weather performance
  • Installation scope

Aluminium Stacker Door Configurations

Three-Panel Stacker Door

A common three-panel arrangement includes:

  • One fixed panel
  • Two sliding panels

The sliding panels collect toward the fixed panel.

This arrangement can open a greater proportion of the total doorway than a conventional two-panel sliding door.

Six-Panel Centre-Opening Stacker Door

A six-panel configuration may open from the centre, with moving panels collecting toward each side.

This can create:

  • A wide central opening
  • Balanced visual proportions
  • Access from the middle of the room
  • A strong connection with a large patio or alfresco space

The exact panel sequence depends on the selected system.

Stacking Left or Right

A stacker door can potentially be designed to collect toward the left or right.

The direction should be selected according to:

  • Room layout
  • Traffic flow
  • Furniture
  • Outdoor access
  • Wall space
  • Preferred handle location
  • Fixed-panel position

Because “left stacking” and “right stacking” can be interpreted differently, approved elevations should clearly show the panel movement.

Centre-Opening Stacker Doors

Centre-opening systems divide the panels so they move away from the centre.

They can suit symmetrical façades and large entertaining areas.

These systems require careful coordination of:

  • Panel numbers
  • Tracks
  • Interlocks
  • Locks
  • Screen configuration
  • Structural opening
  • Drainage
  • Threshold

Stacker Doors with Fixed Sidelights

Fixed glass panels can be positioned beside the operable stacker-door frame.

This can increase the overall glazed area without adding further moving panels.

Stacker Doors with Highlight Windows

Fixed or operable windows may be positioned above a stacker door where additional height, daylight or ventilation is required.

The complete structural opening, framing divisions and installation sequence should be resolved before manufacture.

Custom Aluminium Stacker Door Sizes

Aluminium stacker doors can be custom manufactured within the limits of the selected system.

Practical dimensions are affected by:

  • Overall width and height
  • Number of panels
  • Individual panel size
  • Glass thickness
  • Glass weight
  • Roller capacity
  • Frame strength
  • Wind pressure
  • Building height
  • Water-performance requirements
  • Hardware
  • Transport
  • Site access
  • Installation method

Very wide openings may require additional panels rather than oversized individual panels.

Large Aluminium Stacker Doors

Large stacker doors require careful planning.

Consider:

  • Structural opening
  • Beam deflection
  • Head clearance
  • Sill support
  • Panel weight
  • Roller capacity
  • Handle forces
  • Glass availability
  • Wind pressure
  • Frame strength
  • Transport
  • Installation access
  • Lifting equipment
  • Future glass replacement

Movement or deflection in the surrounding structure can affect door operation.

Structural adequacy remains the responsibility of the appropriately appointed project engineer and builder.

How Are Aluminium Stacker Doors Measured?

A quotation generally requires:

  • Overall width
  • Overall height
  • Number of panels
  • Stacking direction
  • Frame system
  • Glass
  • Colour
  • Screen requirements

Final manufacturing dimensions may also need to account for:

  • Structural opening
  • Installation clearance
  • Floor level
  • Head, sill and jamb conditions
  • Flashings
  • Cladding
  • Masonry
  • Internal reveals
  • Building tolerances
  • Drainage
  • Installation method

The project process should establish who measures and who approves the manufacturing dimensions.

Read our How to Measure Aluminium Windows and Doors Guide.

Stacker Door Opening Direction

Opening and stacking direction must be communicated clearly.

For each door, show:

  • Internal and external sides
  • Fixed-panel location
  • Primary opening panel
  • Direction of travel
  • Final stacking position
  • Handle location

A clear elevation or approved shop drawing is preferable to informal descriptions such as “opens left.”

Double-Glazed Aluminium Stacker Doors

Suitable stacker-door systems can accommodate double-glazed units.

Double glazing can contribute to:

  • Improved thermal performance
  • Improved acoustic performance
  • Greater internal comfort
  • Reduced heat transfer
  • Condensation management

The result depends on the complete framing, glass, seals, interlocks and installation.

Double-glazed panels can be heavy. Frame, rollers, tracks, structural support and hardware must be appropriate for their weight.

Read our Double-Glazed Aluminium Windows and Doors Guide.

Thermally Broken Aluminium Stacker Doors

A thermally broken frame incorporates a lower-conductivity barrier between relevant internal and external aluminium sections.

This can reduce heat transfer through the frame compared with a conventional aluminium system.

Thermally broken stacker doors may suit:

  • High-performance homes
  • Cooler climates
  • Luxury residences
  • Large glazed openings
  • Apartment projects
  • Commercial buildings
  • Projects with demanding energy targets

The required whole-door performance should be established through the approved project energy assessment.

Energy Efficiency

Because stacker doors contain large areas of glass, they can significantly affect building energy performance.

Relevant factors include:

  • Whole-product U-value
  • Solar heat gain coefficient
  • Frame system
  • Glass type
  • Door size
  • Panel interlocks
  • Sliding seals
  • Orientation
  • External shading
  • Internal furnishings
  • Installation
  • Climate

Double glazing alone does not determine complete performance.

The frame, glass, configuration, orientation and shading should be assessed together.

Acoustic Stacker Doors

Stacker doors can form part of an acoustic design, but multiple moving panels and interlocks must be considered.

Performance may be affected by:

  • Glass type
  • Glass thickness
  • Laminated glass
  • Double-glazing configuration
  • Frame design
  • Panel interlocks
  • Perimeter seals
  • Sill
  • Installation
  • Surrounding walls and roof

Where a specific acoustic outcome is required, an appropriately qualified consultant should nominate the required complete construction.

Glass Options

Available glass selections may include:

  • Clear glass
  • Tinted glass
  • Toughened safety glass
  • Laminated glass
  • Low-emissivity glass
  • Obscure glass
  • Single glazing
  • Double glazing
  • Acoustic glass
  • Other project-specific performance glass

Because stacker doors are used within circulation areas, appropriate safety-glass selection is essential.

Glass must suit the panel dimensions, location, wind pressure and applicable requirements.

Aluminium Stacker Doors with Flyscreens

A conventional sliding flyscreen may be available for some stacker-door configurations.

However, a wide multi-panel opening can make screening more complex than a standard two-panel sliding door.

The proposed screen should be coordinated with:

  • Door width
  • Number of panels
  • Track system
  • Stacking direction
  • Access point
  • Handle locations
  • Desired clear opening

Retractable Flyscreens for Stacker Doors

Retractable flyscreens can provide an attractive screening option for wide stacker-door openings.

Options may include:

  • Pleated retractable flyscreens
  • Multi-panel retractable screens
  • Roller retractable screens
  • Other system-specific products

A retractable screen can remain concealed or compact when not in use, helping preserve the appearance and access of the opening.

Read our Retractable Flyscreens for Stacker Doors Guide.

Security Screens

Security-screen options depend on the door system and configuration.

A standard insect screen:

  • Is intended principally for insect control
  • Is not automatically a security product
  • Should not be treated as a fall barrier
  • Should not be relied on for security unless designed and tested for that purpose

If security is a priority, it should be included in the project brief before the door is selected.

Locks and Hardware

Stacker-door hardware may include:

  • Standard handles
  • Keyed locks
  • Multi-point locking
  • Internal snibs
  • Pull handles
  • Flush pulls
  • Rollers
  • Panel-engagement hardware
  • Door stops
  • Project-specific access hardware

The primary panel, secondary panels and stacking sequence should be clear from the approved documentation.

Threshold and Floor-Level Design

The door sill must be coordinated with the internal and external floor construction.

Consider:

  • Internal floor finish
  • External paving or decking
  • Sill support
  • Drainage
  • Waterproofing
  • Weather exposure
  • Accessibility
  • Trip hazards
  • Frame tracks
  • Flashings

A low or flush-looking threshold does not automatically provide the same weather resistance as a raised sill.

Accessibility, appearance and water management must be resolved together.

Drainage and Waterproofing

The complete water-management design may involve:

  • Door-frame drainage
  • Sub-sill
  • Flashings
  • Waterproofing membranes
  • External paving falls
  • Balcony drainage
  • Linear drains
  • Decking
  • Cladding
  • Wall cavities
  • Sealants
  • Roof coverage

External surfaces should direct water away from the opening.

EZ Windows manufactures or supplies the door within its agreed scope and does not assume responsibility for the design of the complete surrounding waterproofing system unless separately and expressly engaged.

Powder-Coat Colours and Finishes

Aluminium stacker doors are available in a broad range of powder-coated colours and finishes.

Final documentation should nominate the approved:

  • Colour name
  • Colour code
  • Powder manufacturer
  • Product range
  • Gloss level or texture
  • Coating system

The appropriate coating system should be selected for the building location and environmental exposure.

Stacker Doors vs Sliding Doors

A conventional sliding door generally uses one sliding panel and one fixed panel.

A stacker door uses multiple sliding panels that collect behind one another.

Choose a stacker door where:

  • A wider opening is desired
  • The structural opening can accommodate additional panels
  • Additional track depth is acceptable
  • The project budget allows for the more complex system

Choose a conventional sliding door where simplicity and a standard opening arrangement are the priorities.

Stacker Doors vs Bifold Doors

Stacker Doors

  • Slide horizontally
  • Require no folding-panel swing area
  • Remain supported by tracks and rollers
  • Leave stacked panels within part of the opening
  • Can be compatible with retractable screens

Bifold Doors

  • Fold and stack toward one or both ends
  • Can open a larger proportion of the doorway
  • Require space for folded panels
  • Use hinges between panels
  • Have different sealing and maintenance considerations

Neither option is universally better. The decision depends on opening width, architecture, exposure, operation, screening, maintenance and budget.

Read our Aluminium Bifold Doors Guide.

Advantages and Limitations

Potential Advantages

  • Wider opening than a conventional sliding door
  • Large glazed area
  • Strong indoor–outdoor connection
  • No hinged-panel swing space
  • Multiple configurations
  • Double-glazing options
  • Retractable-screen compatibility
  • Contemporary architectural appearance

Potential Limitations

  • More tracks than a standard sliding door
  • Only part of the total opening becomes completely clear
  • Tracks require regular cleaning
  • Multiple panels increase hardware complexity
  • Large panels can be heavy
  • Sill and drainage need careful coordination
  • Wide openings require appropriate structural support
  • Screening can be more complex

Cleaning and Maintenance

General maintenance may include:

  • Vacuuming all tracks
  • Removing stones and building debris
  • Cleaning drainage openings
  • Washing frames with suitable mild products
  • Cleaning glass
  • Inspecting seals and interlocks
  • Checking handles and locks
  • Inspecting rollers
  • Adjusting panels where required
  • Avoiding abrasive cleaners
  • Avoiding unsuitable chemicals

Every panel should be operated regularly.

Do not force a panel that becomes difficult to move because this can damage the rollers, locks or frame.

Common Stacker Door Problems

Potential issues can include:

  • Debris within tracks
  • Worn or damaged rollers
  • Panels out of adjustment
  • Misaligned interlocks
  • Damaged handles or locks
  • Inadequate sill support
  • Building movement
  • Blocked drainage
  • Failed surrounding sealants
  • Incorrect external paving levels

The cause should be identified before repairs are undertaken.

Water near a door may originate from the surrounding balcony, paving, membrane, wall or roof rather than the aluminium frame itself.

How Much Do Aluminium Stacker Doors Cost?

The cost depends on:

  • Overall width and height
  • Number of panels
  • Number of tracks
  • Frame system
  • Glass type
  • Single or double glazing
  • Thermal requirements
  • Acoustic requirements
  • Hardware
  • Flyscreens
  • Retractable screens
  • Security screens
  • Powder-coat finish
  • Delivery
  • Installation
  • Access
  • Existing-door removal
  • Structural work

A custom six-panel double-glazed stacker door will cost substantially more than a standard three-panel single-glazed system.

For accurate pricing, provide complete dimensions, panel configuration, glass, colour, screen requirements, project location and installation scope.

Read our guide to the Cost of Aluminium Windows and Doors.

How Long Do Aluminium Stacker Doors Take?

Lead time can be affected by:

  • Door size
  • Number of panels
  • Frame selection
  • Glass availability
  • Double-glazing manufacture
  • Powder coating
  • Hardware
  • Screens
  • Shop-drawing approval
  • Manufacturing capacity
  • Delivery location
  • Installation scheduling

Current lead time should be confirmed when placing the order.

Ordering Aluminium Stacker Doors Online

Before requesting a quotation or placing an order, confirm:

  • Width and height
  • Number of panels
  • Primary opening panel
  • Stacking direction
  • Frame system
  • Glass
  • Colour and finish
  • Hardware and locking
  • Flyscreen or retractable-screen requirements
  • Project location
  • Required performance
  • Supply-only or installation scope

Provide a clear elevation for every multi-panel configuration.

Read more about Aluminium Windows and Doors Online.

Supply Only

Under a supply-only arrangement, the builder or purchaser’s nominated installer is responsible for installation.

The responsible installer and project parties must confirm:

  • Opening dimensions
  • Structural support
  • Sill support
  • Frame alignment
  • Fixings
  • Flashings
  • Waterproofing
  • Drainage
  • Floor levels
  • Sealants
  • Final panel and lock adjustment

Installation is not included unless expressly stated in the accepted quotation.

Supply and Installation

Where installation is specifically quoted and accepted, EZ Windows can coordinate the agreed installation scope.

Review the quotation for inclusions and exclusions involving:

  • Existing-door removal
  • Disposal
  • Structural alteration
  • Flashings
  • Waterproofing
  • Paving or decking
  • Linear drainage
  • Internal finishing
  • External making good
  • Painting
  • Access equipment
  • Electrical work
  • Window furnishings

Aluminium Stacker Door Compliance

Project requirements may concern:

  • Structural performance
  • Wind pressure
  • Water penetration
  • Air infiltration
  • Safety glazing
  • Human impact
  • Energy efficiency
  • Bushfire exposure
  • Acoustic performance
  • Accessibility
  • Thresholds
  • Egress
  • Building classification

EZ Windows manufactures or supplies aluminium doors according to approved project information and the agreed scope.

Unless separately and expressly engaged, EZ Windows does not assume the responsibilities of the project architect, engineer, energy assessor, waterproofing consultant, acoustic consultant, building surveyor or certifier.

Aluminium Stacker Door Warranty

Applicable product, glass, hardware, installation and finish warranty conditions depend on the supplied system and agreed scope.

Warranty coverage can be affected by:

  • Incorrect installation
  • Inadequate sill or head support
  • Building movement
  • Misuse
  • Lack of maintenance
  • Debris within tracks
  • Blocked drainage
  • Environmental exposure
  • Damage by other trades
  • Unauthorised alteration
  • Failure to follow care instructions

Powder-coat warranty conditions depend on the coating system actually selected and applied, environmental exposure and maintenance.

Refer to the complete Aluminium Window and Door Warranty.

Frequently Asked Questions

What is an aluminium stacker door?

It is a multi-panel sliding door in which two or more panels slide and collect behind another panel or at one side of the opening.

Is a stacker door the same as a sliding door?

A stacker door is a type of sliding-door system, but it uses additional sliding panels to create a wider clear opening.

How much of a stacker door opens?

The proportion depends on its configuration. A typical three-panel stacker can open approximately two panel widths, subject to the selected system and panel overlaps.

Can stacker doors open from the centre?

Yes. Multi-panel centre-opening configurations may be available.

Can aluminium stacker doors be double glazed?

Yes, where the selected framing, tracks, rollers and hardware are suitable for the additional glass thickness and weight.

Can stacker doors have flyscreens?

Yes. Depending on the opening, conventional sliding screens or retractable flyscreens may be available.

Are stacker doors better than bifold doors?

Neither is universally better. Stacker doors provide sliding operation without folding-panel swing space, while bifold doors can open a larger proportion of the total doorway.

Are stacker doors suitable for exposed locations?

Potentially, but the selected system, sill, drainage and installation must suit the required wind and water exposure.

Can stacker doors have a flush threshold?

Some systems provide lower-threshold options. Accessibility, drainage and weather performance must be assessed together for the specific opening.

Can stacker doors be custom made?

Yes. EZ Windows supplies custom aluminium stacker doors within the limitations of the selected framing, glass and hardware system.

Are large stacker doors heavy?

Individual panels can become heavy, particularly when double glazed. Proper rollers, frame selection, installation and maintenance are essential.

Does EZ Windows install stacker doors?

Installation is available where specifically quoted and agreed. Supply-only arrangements are also available.

Request a Quote for Aluminium Stacker Doors

For an accurate quotation, send EZ Windows:

  • Door dimensions
  • Architectural plans
  • Window and door schedule
  • Number of panels
  • Opening and stacking direction
  • Glass specification
  • Frame colour and finish
  • Locking requirements
  • Flyscreen or retractable-screen requirements
  • Quantity
  • Project location
  • Required time frame
  • Supply-only or installation requirements

We can review the available information from a quotation and manufacturing perspective and identify any further details required.

Request an Online Quote

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