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Most people don’t think much about their doors until something goes noticeably wrong. A sticky latch, a draught that wasn’t there before, a handle that wobbles — these are the things that eventually prompt a closer look. But the question that often follows is whether a repair will do the job, or whether the door has reached the end of its practical life.
The honest answer is that it depends on what’s failing and why. Some problems are straightforward fixes. Others are symptoms of deeper issues that will keep recurring no matter how often you patch them. Here’s how to tell the difference.
Some draughts are caused by worn or compressed seals, which can be replaced relatively cheaply. If you run your hand around the closed door frame on a windy day and feel air movement, and the seals look visibly flattened, cracked, or missing, replacing the seals is the first thing to try.
But if the draught persists after seals are replaced, or if you can see daylight around a closed door, the problem is likely in the frame or the door itself. Frames can shift, settle, or warp over time — particularly timber frames in older homes that have experienced moisture ingress. A warped or twisted door slab won’t seal properly no matter how good the seal material is.
When frame distortion is the issue, repair options become limited. You can plane or adjust a door slab to a degree, but significant twisting or bowing in the frame means the geometry is compromised. At that point, replacement is usually the practical option.
Timber doors and frames are susceptible to rot when moisture gets in. The early signs are paint that peels, bubbles, or fails to adhere, and soft spots in the timber when pressed. By the time rot is visible at the surface, it’s usually more extensive beneath.
Small areas of superficial rot can sometimes be treated and repaired with epoxy filler systems. But if the rot is in structural areas — the lower rail of the door, the hinge stiles, or the frame itself — the structural integrity is compromised. A door that doesn’t provide genuine security is not doing its job, regardless of how it looks.
Checking the bottom of external doors is worth doing periodically. It’s the area most exposed to moisture and the most commonly affected by rot. If the wood is soft, discoloured, or crumbly, the door has typically reached replacement territory.
If a door can be forced without the lock actually being broken — if the frame splits, the door flexes significantly when pushed, or the hardware is loose in a way that can’t be properly re-fixed — it’s a security risk. Older door frames that have had multiple sets of hardware fitted over the years often have compromised timber around locking points.
Assess whether the lock actually engages fully with the strike plate, whether the hinges are solid, and whether the door fits tightly in the frame. Multi-point locking systems require a door that fits accurately. A sagging or twisted door won’t allow the locking points to engage correctly.
Security is not an area where persisting with a failing door makes sense. The cost difference between a repair and a replacement is rarely worth a security compromise.
Old single-glazed doors — particularly aluminium sliding doors from the 1970s, 80s, and 90s — can be a significant source of heat loss and gain. If your energy bills feel high relative to your insulation and heating/cooling setup, if you have persistent condensation on door glass in winter, or if you notice cold radiating from the door area in winter, the door’s thermal performance may be poor enough to warrant replacement.
This isn’t always a structural failure — the door might still function and seal reasonably well. But its energy performance is contributing to higher bills and reduced comfort, and upgrading to double glazing could make a meaningful difference to both.
Sliding doors that have become difficult to operate, creak, jump the track, or require lifting to move are telling you that the hardware is worn, the track is damaged, or the door is no longer sitting properly in its frame. These issues can sometimes be resolved with hardware replacement, track cleaning, or frame adjustment — but if the track itself is bent or the rollers have been replaced and still fail, the unit may be at end of life.
For hinged doors, hinges that have pulled from the frame, sagging that causes the door to drag, and latches that don’t catch without a lift or a shove are all signs that the door and frame relationship has deteriorated. Again, some of this is fixable; some is not.
Sometimes a door is structurally sound but cosmetically deteriorated to a degree that impacts your home’s value and appearance. Extensively scratched aluminium, uPVC that has discoloured beyond cleaning, or timber that has been repainted many times and looks rough — these are aesthetic judgements but valid ones.
The question is whether the cost of restoration (stripping, treating, repainting timber; professional cleaning or replacement panels for uPVC) is justified relative to the cost of a new door. For high-quality timber doors on period homes, restoration is often worthwhile. For standard aluminium or entry-level uPVC, replacement is often more cost-effective.
Quality solid timber doors can last many decades with proper maintenance. uPVC and aluminium doors typically have lifespans of 25-35 years or more. The actual lifespan depends heavily on maintenance, climate exposure, and initial quality.
Small areas of rot in non-structural locations can sometimes be repaired with epoxy filler systems. Rot in structural areas, extensive rot, or rot that has compromised the locking points of the frame is generally best addressed by full replacement.
For most Australian homeowners, yes. The combination of improved thermal performance, better operation with new hardware, and improved security with modern locking systems typically represents good value, particularly when the existing doors are 20 or more years old.
Check whether the door fits squarely in the frame — look for uneven gaps around the perimeter. Also check the threshold seal at the bottom. If the door has settled or the frame has shifted, the door may no longer sit square, leaving gaps the seal can’t bridge. This often requires adjustment of hinges or the frame, or replacement if the distortion is significant.