A cavity slider is a sliding door that retracts into a framed wall pocket instead of swinging into the room. It saves usable floor and wall space, creates a clean opening and suits Australian bathrooms, ensuites, studies and living areas. Success depends on choosing compatible doors, hardware, framing and installation details.
If you're renovating a compact apartment, reworking an ensuite or trying to make an open-plan area more flexible, a hinged door can consume valuable space. Its swing arc affects furniture placement, circulation and how comfortably you can use the room.
Cavity sliding doors solve that problem without leaving the door visible along the wall. We've created this simple guide to help you compare systems, check the practical details and order with confidence.
Key takeaways
Cavity sliders work best when the complete system is planned before framing and lining begin. The door, cavity frame, track, rollers, jambs and hardware must suit one another. Room use also matters because bathrooms, accessible spaces and wide living openings impose different requirements.
- A cavity slider removes the floor area required for a hinged door's swing arc.
- Single, double, corner and flush systems serve different layouts.
- Door thickness, weight and construction must match the cavity kit specification.
- Wet areas need suitable door materials, ventilation and compliant waterproofing details.
- Accurate framing and track alignment determine how smoothly the door operates.
- Regular cleaning and adjustment usually prevent dragging, rattling and difficult movement.
Cavity slider types at a glance
The right configuration depends on the opening, available wall length and desired visual result. A single cavity slider is usually the simplest option. Double and corner systems create broader connections, while flush cavity doors and concealed door systems prioritise a cleaner architectural finish.
| Cavity slider type | How it works | Ideal applications | Main consideration |
| Single | One leaf slides into one wall pocket | Ensuites, bathrooms, studies and laundries | Needs an unobstructed pocket beside the opening |
| Double | Two leaves retract into opposing pockets | Living rooms, dining areas and flexible open-plan zones | Both tracks and meeting stiles require precise alignment |
| Corner | Door leaves meet at a corner and retract separately | Entertaining areas and connected indoor spaces | Structure above the corner needs early assessment |
| Flush | The closed door aligns closely with the surrounding wall finish | Minimal interiors and discreet room entries | Jamb, shadow-line and handle details must be coordinated |
| Concealed system | Track, guides and hardware are visually minimised | High-detail residential and architectural projects | Future access to serviceable components must be retained |
How does a cavity slider work?
A cavity slider hangs from rollers running inside an overhead track. When opened, the door travels into a framed pocket concealed within the wall. Floor guides control sideways movement, while stops, jambs and closing hardware keep the leaf aligned and secure in its open and closed positions.
Unlike a surface-mounted sliding door, the open leaf doesn't cover the adjacent wall. You can place furniture, artwork or switches where a barn-style door would otherwise travel, provided those items don't interfere with the cavity structure or services.
The main components
A complete cavity door kit generally brings several coordinated parts together:
- A structural frame or cassette forming the wall pocket
- An overhead track
- Roller carriages and door hangers
- A floor guide
- Door stops or soft-closing hardware, where specified
- Split jambs and finishing trims
- A closing jamb
- Recessed pulls, privacy hardware or edge pulls
- The compatible door leaf
The exact inclusions vary. Check the product schedule rather than assuming the kit contains the door, handle, lock or finishing jambs.
Why the pocket must stay clear
The pocket is not a normal section of wall. Screws driven into it can scratch or stop the door. Plumbing pipes, electrical cables and bulky fittings can also conflict with the moving leaf.
Plan switches, towel rails, cabinetry and wall-mounted accessories before the wall is closed. Use fixings approved for the cavity frame and lining system. Guessing the screw length is an easy way to damage a finished door.
Cavity slider, pocket door or cavity unit?
Australian suppliers commonly use these terms to describe closely related products. The cavity slider is the finished operating door system. The cavity unit or kit usually refers to the frame, track and hardware installed inside the wall. A pocket door is the broader international term for a door concealed in a wall pocket.
Which cavity slider configuration should you choose?
Choose the simplest configuration that achieves your required opening. Single sliders suit most small rooms. Double systems connect larger spaces, while corner and concealed systems need more coordination. Your available wall length, ceiling structure, door weight and preferred closed-door appearance should decide the system, not appearance alone.
Single cavity sliders
A single system is practical where one clear wall section sits beside the doorway. It works well for a compact bathroom, ensuite, pantry, laundry or home office.
You can compare a square cavity slider when you want straight, contemporary trim details. A round cavity slider offers a softer profile that may sit more comfortably with traditional architraves and internal joinery.
Double cavity sliders
A double system uses a pocket on each side. The leaves meet in the centre when closed and disappear in opposite directions when opened.
This arrangement is useful between living and dining areas because it provides both separation and a generous connection. Privacy, acoustics and air movement still need consideration. Two sliding leaves won't automatically seal like a purpose-designed hinged acoustic door.
Corner cavity sliders
Corner sliders can open two adjoining sides of a room. They can create an uninterrupted connection between entertaining zones, but the missing corner post changes how loads are supported above.
Bring a builder, building designer or structural engineer into the discussion before ordering. A door supplier can confirm product compatibility, but shouldn't guess how a load-bearing corner must be supported.
Flush and concealed systems
Flush cavity doors minimise visible architraves and help the closed leaf read as part of the wall. The result can look simple, but the work behind it isn't casual.
Wall thickness, lining build-up, shadow gaps, skirting junctions, handle clearance and paint finishes need to be resolved together. The track should also remain serviceable. A concealed system that requires destructive work for routine adjustment is poorly detailed.
How do you select the right door and hardware?
Start with the cavity kit's published limits and work back to a compatible door leaf. Confirm the required opening, finished wall thickness, leaf dimensions, door construction, weight and hardware preparation. Never assume that an attractive internal door can be fitted to any cavity frame without checking its specification.
Check the door construction
The supplier needs to confirm whether the chosen leaf can accept hangers, recessed pulls and privacy hardware. Lightweight, solid-core, glazed and routed doors behave differently.
A heavy or glazed door may require different rollers and stronger framing. Some door designs also have narrow stiles that leave insufficient material for a recessed lock. Ask before the door is machined.
Our internal door collection gives you a starting point for comparing profiles and finishes from the comfort of your own home. Compatibility still needs to be checked against the selected cavity system.
Match the rollers to the leaf
Rollers should be rated for the actual door, not selected on appearance or price alone. Smooth bearings matter, but so do adjustability and replacement access.
We prefer hardware that can be adjusted without opening the wall. Building movement and normal use can alter door alignment, so access to the hangers is a practical maintenance feature.
Choose handles early
Standard projecting handles can hit the jamb or prevent the door retracting properly. Cavity sliders usually need recessed pulls, edge pulls or purpose-designed privacy sets.
Check whether you need:
- Passage hardware for a living area or study
- Privacy hardware for a bathroom or ensuite
- An edge pull to retrieve a fully recessed leaf
- Accessible hardware specified by the project designer
- A soft-close or soft-open function
- A lock that suits the door's stile and thickness
Decide how much visual privacy you need
Glazed cavity sliders can distribute light between rooms. Solid doors provide better visual privacy, but perimeter gaps can still transmit sound and light.
If acoustic separation is critical, ask for tested system information. A solid-core door may improve the result, but the complete assembly, including jambs, seals and the floor gap, controls performance.
Where do cavity sliders work best?
Cavity sliders are particularly useful where a hinged leaf obstructs fixtures, furniture or circulation. Bathrooms, ensuites, studies, laundries and connected living areas are common applications. The room's moisture, privacy, accessibility and acoustic needs should determine the door material and hardware rather than space saving alone.
Bathrooms and ensuites
A cavity slider can stop a door colliding with a vanity, toilet or shower screen. It can also remove an inward swing that complicates access to a small room.
Wet-area suitability involves more than selecting a moisture-resistant finish. The wall, floor junctions and penetrations must fit the waterproofing design. The National Construction Code sets requirements for wet-area construction, with referenced standards including AS 3740 where applicable. Check the adopted NCC edition and local requirements for your project through the Australian Building Codes Board.
Keep these details in mind:
- Don't place unplanned fixings through the lining into the pocket.
- Select door faces and edges suitable for expected humidity.
- Seal and finish the door as required by its manufacturer.
- Position the cavity away from direct shower exposure where possible.
- Confirm how privacy hardware can be released in an emergency.
- Maintain effective room ventilation.
Studies and multipurpose rooms
A cavity slider allows a small study to close for calls and reopen without leaving a door across the wall. It also gives you more freedom to position a desk near the entry.
Customer feedback supplied for this guide captures the practical benefit:
> "The cavity sliders from Complete Doors Online changed our small study into a versatile space. Installation was straightforward, and the quality is exceptional. Highly recommend." > > Sarah, Sydney
Installation difficulty varies with the wall and system, so straightforward installation in one project isn't a guarantee for every renovation.
Living and dining areas
Double cavity sliders can divide a large room without permanently breaking the visual connection. They suit households that want open space most of the time but occasionally need privacy, noise separation or different heating and cooling zones.
Door storage is built into the walls, leaving both sides of the opening visually cleaner. Coordinate floor finishes carefully so the opening doesn't look interrupted when the leaves are retracted.
Accessible circulation
A sliding door can remove a swing-path obstruction, but that doesn't make every cavity slider accessible. Clear opening width, approach space, operating force, handle height and hardware usability all matter.
Projects with accessibility obligations should be assessed against the applicable NCC provisions and AS 1428.1. Standards Australia lists the standard in its standards catalogue. Have the building designer or access consultant document the relevant requirements before ordering.
What should Australian homeowners check before ordering?
Before ordering, verify the finished opening, available pocket space, wall thickness, structural conditions, services, skirting details and door specification. Renovations also require investigation behind existing linings. Ordering from rough assumptions can leave you with a cavity unit that cannot fit the wall or carry the selected leaf.
Measure the complete wall, not only the doorway
The pocket needs enough uninterrupted wall length to receive the leaf, plus the framing and jamb allowances specified by the manufacturer. Measure around corners, cabinetry, windows and intersecting walls.
Record both the structural opening and intended finished opening. Floor finishes, plasterboard, tiles and jambs can all change the final result.
Check wall thickness and lining build-up
Cavity kits are designed around particular framing and lining arrangements. Additional wet-area sheeting, tiles or flush-wall details can alter the finished jamb relationship.
Provide the supplier with a wall section if the build-up isn't conventional. It is easier to resolve a trim detail before manufacture than after tiling.
Locate structure and services
Establish whether the wall is load-bearing. Then check for plumbing, electrical cables, ducts and data services. Older homes may contain materials requiring specialist assessment before disturbance.
The Australian Government's Asbestos Safety and Eradication Agency provides guidance on asbestos risks. Don't cut into suspect building material to investigate a cavity.
Consider the environment
Internal coastal homes can still experience humid and salt-laden air. Specify corrosion-resistant hardware where the manufacturer recommends it, particularly near frequently opened external areas.
The door finish also matters. Seal required faces and edges, follow care instructions and avoid exposing an internal door system to conditions it wasn't designed to handle.
Confirm supply timing
Check lead times before framing around a particular system. In our experience, a builder once ordered doors with a typical lead time of 3-4 weeks but needed them within a 2 week programme. We coordinated with the manufacturer and courier, and the delivery reached Melbourne before his deadline.
That outcome depended on production and freight lining up. It isn't sensible to build every programme around an exception. Confirm stock, manufacturing and delivery timing before promising an installation date.
How is a cavity slider installed?
Installation begins with a square, level structural opening and a cavity frame assembled to the manufacturer's instructions. The installer secures and aligns the track, hangs and adjusts the door, adds jambs and guides, then tests the full travel before lining and finishing the wall. Errors hidden early become expensive later.
The following sequence is an overview, not a substitute for the kit instructions or project drawings.
Confirm the design and components
Before cutting framing, compare the ordered system with the door schedule. Check handing where relevant, finished floor level, leaf construction, hardware and wall build-up.
Lay out all components and identify any model-specific brackets or stops. Don't substitute fixings unless the manufacturer permits it.
Prepare the opening
The opening must be plumb, level and free from twist. Confirm the header can support the assembly and any loads specified by the building design.
Structural framing changes may require a suitably qualified tradesperson. The National Construction Code and state or territory building rules apply alongside the manufacturer's requirements.
Assemble and position the cavity frame
Build the cassette or frame on a flat surface where the instructions call for pre-assembly. Position it within the opening and check the pocket alignment before fixing.
A bowed pocket can rub against the leaf. Over-tightened fixings can also distort lighter frame members.
Install and align the track
The overhead track controls the door's movement. Set it level and straight, then secure it using the specified fixing points.
Clean debris from the track before fitting the rollers. Plaster, sawdust and metal fragments can create noise or damage moving parts.
Hang the door and fit the guide
Attach hangers where the door construction allows, mount the leaf and adjust its height. Fit the floor guide so the door travels without excessive sideways movement.
Test the leaf repeatedly. It should move freely, remain vertical and meet the closing jamb evenly. Confirm clearances against finished floor levels, not an unfinished surface that will later receive tiles or boards.
Fit jambs and hardware
Install split jambs, stops, trims, pulls and locks in the order specified. Test privacy functions and confirm the handle doesn't obstruct retraction.
Protect the door during plastering and painting. Wet compounds, overspray and sanding dust don't belong in the track.
Inspect before closing the wall
This is the point to photograph concealed framing, check service locations and complete the final travel test. Confirm no fixing projects into the pocket.
Once lining is installed, use only approved fixing zones. Give future trades the photographs so a towel rail or cabinet isn't accidentally screwed into the door path.
What maintenance does a cavity slider need?
Cavity sliders need light, regular maintenance rather than aggressive lubrication. Keep the track and floor guide free from debris, watch for rubbing or changes in alignment, and tighten accessible hardware when required. Use only cleaners and lubricants approved by the system manufacturer because unsuitable products can attract dirt or damage finishes.
A practical maintenance checklist
- Vacuum accessible track and guide areas.
- Wipe recessed pulls and edge hardware with a suitable cleaner.
- Check that the door closes evenly against the jamb.
- Listen for new scraping, clicking or grinding sounds.
- Inspect the floor guide for movement or damage.
- Check wet-area door edges for coating failure or swelling.
- Arrange adjustment if the leaf drops or begins rubbing.
Don't force a sticking door. The cause may be debris, a loose guide, roller adjustment, door swelling or movement in the frame. Continuing to drag the leaf can damage both the door and hardware.
What do the supplied Australian project examples show?
Project information supplied by Complete Doors Online shows that cavity sliders deliver the greatest value when they solve a specific layout constraint. The strongest outcomes were not simply a hidden door. They involved reclaimed floor area, better light distribution, improved circulation and a more flexible connection between rooms.
North Melbourne apartment renovation
A flush cavity slider replaced a hinged door that restricted furniture placement in a compact apartment. According to Complete Doors Online's supplied project data, the revised layout added 2 sqm of usable floor space and increased natural light by 15%.
The lesson is broader than the figures. The door choice worked because the wall pocket, flush finish and room layout were considered as one design decision. Replacing the leaf alone wouldn't have created the same result.
Sunshine Coast coastal home
Double cavity sliders were used to connect major living zones in a Sunshine Coast home. Complete Doors Online's supplied project notes report improved accessibility and a stronger open-plan feel when the leaves were retracted.
For a coastal project, hardware selection and maintenance also deserve attention. Salt-laden air, humidity and frequent use can expose unsuitable components quickly. The complete system should be selected for its location and expected operating conditions.
Why planning beats choosing from a showroom display
Our view is simple: cavity sliders should be selected from verified specifications, not from a quick opening-and-closing test in a showroom. Product photography, drawings, compatible-door information and responsive advice let Australian renovators and tradies compare systems online while making decisions based on the actual wall and project.
The way people buy construction products has changed. We began as a local Sydney operation with a traditional showroom. As showroom traffic declined and online ordering grew, we eventually moved fully online and broadened our service across Australia.
That model works because a cavity slider is a technical purchase. You need clear images, dimensions, inclusions and compatibility advice. A display door can feel smooth while telling you nothing about whether the kit suits your wall thickness, chosen leaf or privacy hardware.
Before ordering online, send the supplier:
- Project location and room type
- Opening and wall measurements
- Photos or drawings of the wall
- Selected door design and construction
- Desired trim profile
- Handle, lock and soft-close requirements
- Wet-area or accessibility considerations
- Required delivery timing
This is how you order with confidence. Convenience matters, but accurate product information matters more.
Frequently asked questions
The most useful cavity slider questions concern sizing, door compatibility, wet areas, maintenance and genuine space savings. There isn't one universal answer for every manufacturer or building. Check the selected kit's technical information and involve your builder or designer where structural, waterproofing or accessibility requirements affect the installation.
What are the standard cavity slider sizes in Australia?
There is no single universal cavity slider size covering every Australian supplier. Manufacturers offer systems matched to nominated door leaves, wall framing and finished openings. Measure the structural opening and confirm the kit's door size, wall thickness and jamb allowances before ordering. Never select from the door width alone.
Can any door be used as a cavity slider?
No. The leaf must fit the kit's dimensional and weight limits and accept the required hangers, pulls and lock preparation. Glazed, solid-core, routed and lightweight doors can require different hardware. Ask the door and cavity supplier to confirm compatibility before machining or finishing the leaf.
What maintenance do cavity sliders require?
Keep the track and floor guide clean, inspect alignment and tighten accessible hardware where required. Don't flood the track with general-purpose lubricant because it may attract dirt. If the door begins scraping, dropping or rattling, identify the cause rather than forcing it through the pocket.
Are cavity sliders suitable for wet areas?
They can be suitable for bathrooms and ensuites when the door, finish, frame and hardware match the environment. Waterproofing and wall penetrations must follow the project design and applicable NCC requirements. Avoid unplanned fixings into the pocket and protect the door edges from persistent moisture.
How much space do cavity sliders save?
A cavity slider removes the swing arc required by a hinged door. The usable benefit depends on the room layout and what can occupy that released area. Complete Doors Online's supplied North Melbourne project data recorded 2 sqm of added usable floor space, but every project should be assessed from its own plan.
How do cavity sliders compare with barn doors for space saving?
Both remove the hinged swing arc. A cavity slider also conceals the open leaf, leaving the adjacent wall available for furniture or decoration. A barn door is easier to install on some existing walls but needs clear wall space along its travel path and remains visible when open.
Ready to choose your cavity slider?
Choose your cavity slider by starting with the room, opening and wall conditions, then matching the kit, door and hardware. If you're uncertain about sizing, finishes or compatibility, send us your measurements and project details. Our team can help you narrow the options before you order or begin framing.
Contact Complete Doors Online for practical product advice and help choosing a cavity slider system for your Australian renovation or building project.
References
These references cover Australian building, accessibility, waterproofing and hazardous-material considerations relevant to cavity slider planning. Project outcomes and customer feedback are based on information supplied by Complete Doors Online for this guide. Always check the adopted rules, product instructions and professional requirements applying to your own site.
- Australian Building Codes Board, National Construction Code: https://ncc.abcb.gov.au/
- Standards Australia, Standards Catalogue, including AS 1428.1 and AS 3740: https://www.standards.org.au/standards-catalogue
- Australian Government Asbestos Safety and Eradication Agency: https://www.asbestossafety.gov.au/
- Complete Doors Online, project data, business experience and customer testimonial supplied for this guide.
