Yes, installing a new sliding door track on a wardrobe is well within reach for a confident DIYer. It requires no licensed trade work, just careful measuring, the right hardware, and a methodical approach. That said, if your wardrobe opening is out of square or you're dealing with a custom-built unit, a qualified joiner can save you a lot of frustration.
Understanding How Sliding Door Track Systems Work
Most wardrobe sliding doors use a top-hung or bottom-rolling system — or a combination of both.
- Top-hung systems carry the full weight of the door from a track fixed to the top of the opening. The bottom guide simply keeps the door from swinging out.
- Bottom-rolling systems run the door on a floor-level track, with a top guide to keep the door upright.
Top-hung systems are more common in modern NZ wardrobes and tend to give a cleaner look. Bottom-rolling systems are often found in older homes and can be noisier over time.
Tools and Materials You'll Need
Before you start, gather the following:
- Tape measure and pencil
- Spirit level
- Power drill and drill bits
- Screwdriver (Phillips and flat-head)
- Hacksaw or metal cutting blade (to trim aluminium track to length)
- Safety glasses
- Replacement track kit (top and bottom)
- Replacement rollers or hangers if needed
- Wall plugs or timber screws appropriate for your substrate
Replacement sliding door hardware is widely available at Bunnings and Mitre 10. Check whether your existing doors are standard sizes — many NZ wardrobe doors are 1800 mm or 2100 mm tall — so you can match the hardware correctly.
Step-by-Step: Fitting the Track
1. Remove the Old Track
Lift the existing doors off the track first. For top-hung doors, tilt the bottom of the door toward you and lift up to disengage the hangers. Unscrew and remove the old top track and bottom guide channel.
2. Check Your Opening Is Square
Measure the width at the top, middle, and bottom of the opening. Measure the height on both sides. If the measurements vary by more than about 5 mm, your opening may be out of square and you may need to pack or shim the track to compensate. Significant racking could indicate a structural issue worth investigating.
3. Cut the Track to Length
Measure the width of the opening carefully. Cut your new top track and bottom guide to length using a hacksaw. Deburr the cut ends with a file or fine sandpaper so they don't snag the door.
4. Fix the Top Track
Hold the top track in position and use a spirit level to confirm it's perfectly horizontal — this is the most important step. A track that isn't level will cause the doors to drift open or closed on their own. Mark your fixing points, pre-drill, and screw the track firmly into the timber header or nogging above the opening. If you're fixing into plasterboard only, use appropriate wall anchors, but ideally locate the timber framing behind it for a solid fix.
5. Fit the Bottom Guide
For a top-hung system, the bottom guide channel sits on the floor or on a small timber threshold. It simply keeps the door from swinging outward. Fix it centrally in the opening, aligned with the top track.
6. Hang the Doors
Attach the hanger rollers to the top of each door if they aren't already fitted. Engage the hangers into the top track, then lower the bottom of the door into the guide channel. Adjust the roller height using the adjustment screws so the door hangs evenly and clears the floor by 5–10 mm.
7. Test and Fine-Tune
Slide each door back and forth. It should glide smoothly without wobbling or binding. Adjust the rollers as needed. Check that the doors overlap correctly in the centre when closed.
Common Problems and How to Avoid Them
| Problem | Likely Cause | Fix |
|---|---|---|
| Door drifts open or closed | Top track not level | Re-level and re-fix track |
| Door wobbles side to side | Bottom guide too loose | Adjust or replace guide |
| Door scrapes the floor | Rollers set too low | Raise rollers via adjustment screws |
| Door jumps off track | Hangers worn or wrong type | Replace hangers to match track |
Painting or Finishing Around the Track
If you're refreshing the wardrobe at the same time, it's easiest to paint the interior before re-fitting the track. Resene and Dulux both offer interior trim paints well suited to wardrobe joinery.
When to Call a Professional
While this is a DIY-friendly job, consider calling a qualified joiner if:
- Your wardrobe opening is significantly out of square and needs remedial framing work
- The doors are heavy custom-made panels (e.g. solid timber or mirrored glass over 20 kg per leaf)
- You're installing a brand-new wardrobe from scratch that involves fixing to walls or modifying framing — this may require a building consent depending on scope, so check with your local council or refer to MBIE Building Performance for Schedule 1 exemption guidance
- The existing structure shows signs of moisture damage or rot
A skilled joiner will have the right jigs and experience to get the job done quickly and accurately. You can find qualified local joiners on tradedirectory.co.nz.
Safety note: When handling large mirrored or glass-panelled doors, always wear safety glasses and gloves, and get a second person to help lift and manoeuvre them.
