A door that sticks, drags, or refuses to latch properly is one of those everyday frustrations that can quietly drive you mad. In New Zealand, the problem is especially common because our climate swings between humid summers and cold, damp winters — and timber moves with every change in moisture. But humidity isn't always the culprit. Settlement, worn hardware, and poor installation can all cause the same symptoms. This guide walks you through diagnosing the problem and fixing it safely.
Common Causes of Sticking or Misaligned Doors
Understanding why your door is sticking helps you choose the right fix rather than just sanding away and making things worse.
- Timber swelling – Solid timber and MDF doors absorb moisture and expand, especially in bathrooms, laundries, and during humid NZ summers.
- House settlement – New builds and older homes both settle over time, racking the door frame out of square.
- Loose or worn hinges – Hinge screws work loose, letting the door sag and drag on the frame or floor.
- Paint build-up – Multiple coats of paint over the years can reduce clearance to almost nothing.
- Warped door – A door left in a damp or poorly ventilated room can bow or twist.
- Latch or strike plate misalignment – The latch bolt no longer lines up with the strike plate hole.
How to Diagnose the Problem Step by Step
Before reaching for a plane or sander, spend five minutes working out exactly what's happening.
Step 1 – Identify where it's binding
Open and close the door slowly while watching the gap around all four edges (top, latch side, hinge side, bottom). Use a piece of thin cardboard to check the gap is consistent. Mark any tight spots with a pencil.
Step 2 – Check the hinges
With the door closed, grab the handle and try to lift it slightly. If there's noticeable movement, the hinges are loose or worn. Open the door and inspect each hinge — look for loose screws, bent leaves, or a hinge that's been painted over and is no longer sitting flush.
Step 3 – Check the frame for square
Use a spirit level on the hinge-side jamb (it should be plumb) and a long straightedge or level across the top jamb (it should be level). If the frame is out of square, you're likely dealing with settlement rather than a swollen door.
Step 4 – Look at the latch
Close the door gently without latching it, then try to latch it. If the bolt hits the strike plate face rather than entering the hole, the door has dropped or the frame has moved. You can often see a shiny wear mark on the strike plate showing exactly where the bolt is hitting.
Step 5 – Check for a warp
With the door open, sight down it from the top like you would a piece of timber. A slight bow or twist will be obvious.
What You Can Safely Fix Yourself
Many sticking door problems are well within a confident DIYer's ability. Here's what you can tackle:
Tighten or repair loose hinges
This is the most common fix and often solves the problem entirely.
- Tighten all hinge screws. If a screw spins without gripping, the hole is stripped.
- To fix a stripped hole, remove the screw, fill the hole with a wooden toothpick or matchstick and a dab of PVA glue, let it dry, then refit the screw.
- If the hinge leaf sits proud of the timber (not recessed properly), chisel the mortise slightly deeper so the hinge sits flush.
Adjust the strike plate
If the latch is only slightly misaligned (a millimetre or two), you can file the strike plate opening in the direction needed, or unscrew it and reposition it slightly. Fill the old screw holes with toothpicks and PVA before repositioning.
Plane or sand a swollen door
- Remove the door from its hinges (tap the hinge pins out from below using a screwdriver and hammer).
- Mark the binding area clearly.
- Use a hand plane, belt sander, or orbital sander to remove material gradually — take off a little at a time and rehang to test.
- Seal the planed edge immediately with primer and paint. Bare timber will re-absorb moisture and swell again. Resene and Dulux both offer suitable interior primers.
Remove paint build-up
If the door is binding only where it meets the stop bead or frame, carefully scrape or sand back the paint on the door edge and repaint with a single thin coat.
| Problem | Likely DIY fix | Difficulty |
|---|---|---|
| Loose hinge screws | Tighten / toothpick repair | Easy |
| Strike plate misalignment | File or reposition plate | Easy |
| Paint build-up | Sand/scrape edge | Easy |
| Swollen door edge | Plane or sand | Moderate |
| Warped door | Replace door | Moderate–Hard |
| Frame out of square | Structural repair | Call a pro |
How to Prevent It Recurring
- Seal all six faces of a timber door (including top and bottom edges) before hanging. Unfinished edges are the main entry point for moisture.
- Ventilate wet areas — run the rangehood or bathroom fan during and after cooking or showering. This is also a requirement under the Healthy Homes Standards for rental properties.
- Check hinges annually as part of general home maintenance and tighten any screws that have worked loose.
- Use quality hardware — cheap hinges wear faster. Three hinges on taller or heavier doors distribute the load better than two.
- If you're in a new build, be aware that some movement and settlement is normal in the first year or two. BRANZ has good guidance on what's considered normal movement in NZ timber-framed homes.
When to Call a Professional
Some door problems are symptoms of something more serious, and that's when you need a qualified carpenter or builder.
Call a carpenter if:
- The frame is visibly racked or out of square — this may indicate foundation settlement or structural movement that needs assessment.
- Multiple doors throughout the house have started sticking at the same time (a sign of whole-house movement).
- The door or frame is rotted and needs replacement.
- You need a new door hung and trimmed to fit — getting the fit right on a new door requires experience and the right tools.
- The problem keeps coming back despite your fixes.
A note on structural concerns: If you suspect the movement is caused by foundation or structural issues, this goes beyond carpentry. You may need a Licensed Building Practitioner (LBP) or structural engineer to assess the building before any remedial work is done.
Electrical, gas, and plumbing reminder: Sticking door repairs are purely carpentry work — no restricted trades are involved. However, if your door is near a wall you're considering opening up, always check for hidden wiring or pipes before cutting into any framing. Electrical work must only be carried out by a registered electrician (EWRB), and plumbing by a licensed plumber (PGDB).
A skilled local carpenter can diagnose and fix most door problems in under an hour. You can find qualified tradespeople in your area on tradedirectory.co.nz.
