Yes — in most situations you can replace a door hinge without fully removing the door from its frame. By working one hinge at a time and keeping the door supported, you can swap out worn or damaged hinges with basic hand tools and a bit of patience. Here's everything a NZ homeowner needs to know.
Why Hinges Fail
Door hinges take a lot of daily punishment. Over time you might notice sagging, squeaking, binding, or visible rust and cracking around the hinge plate. Common causes include:
- Loose or stripped screw holes in the timber
- Corrosion, especially in coastal or high-humidity areas common across much of New Zealand
- Cheap hinges that have simply worn out
- Seasonal timber movement causing the hinge to work loose
Replacing a hinge early prevents more serious damage to the door edge, frame, or latch mechanism.
Tools and Materials You'll Need
- Flathead and Phillips screwdrivers (or a cordless drill/driver)
- Hammer and nail punch (optional)
- Chisel and mallet (if re-mortising is needed)
- Replacement hinge — matched to the existing size and style
- Longer screws (e.g. 65–75 mm) if screw holes are stripped
- Timber filler or wooden toothpicks and PVA glue (for stripped holes)
- A wedge or door stop to support the door
Matching your hinge: Take the old hinge to your local hardware store — Bunnings or Mitre 10 both carry a good range of butt hinges in standard NZ sizes. Common residential sizes are 75 mm and 100 mm. Match the finish (chrome, satin, brass, etc.) if appearance matters.
Step-by-Step: Replacing One Hinge at a Time
The key principle is never remove all hinges at once. Work on one hinge while the others hold the door in place.
1. Support the Door
Wedge a piece of timber or a folded cloth firmly under the door's bottom edge to take the weight off the hinge you're working on. This stops the door from dropping and stressing the remaining hinges.
2. Remove the Old Hinge Screws
Unscrew the hinge leaf from the door first, then from the frame. If screws are painted over, score around them with a knife. If they're seized, a few drops of penetrating oil and a well-fitting screwdriver head will help.
3. Check the Mortise (Recess)
The mortise is the shallow recess chiselled into the door edge and frame so the hinge sits flush. Check that your new hinge fits the existing mortise. If the new hinge is slightly smaller, you may need to pack it out with a thin piece of card. If it's larger, carefully extend the mortise with a sharp chisel.
4. Fix Stripped Screw Holes
Stripped holes are a very common problem. The easiest fix is to dip a few wooden toothpicks in PVA glue, pack them into the hole, let them dry, then trim flush. This gives the screws fresh timber to bite into. Alternatively, use longer screws (at least 65 mm) that reach past the door frame into the surrounding framing — this is actually the stronger long-term fix.
5. Fit the New Hinge
Position the new hinge leaf in the mortise and drive screws in by hand first to avoid cross-threading. Start with the frame leaf, then the door leaf. Check the door swings freely and closes without binding before moving on to the next hinge.
6. Repeat for Each Hinge
Once the first hinge is secure, move to the next, always keeping at least one hinge fully fastened while you work.
Dealing With a Sagging Door
If the door has been sagging for a while, simply replacing the hinge may not fully fix the problem. Check whether the frame itself has moved — this can happen in older NZ homes with timber framing that has dried and settled. If the frame is racked or the door no longer sits square in the opening, you may need a joiner to plane the door edge or adjust the frame.
Paint and Finish
If you're repainting after the job, Resene and Dulux both offer suitable trim paints for door frames. Lightly sand and prime bare timber before topcoating.
NZ Building Code Considerations
Replacing a like-for-like hinge on an existing door is routine maintenance and does not require a building consent. However, if you're replacing a fire door (common in garages attached to living areas, or in commercial buildings), the hinges must meet specific requirements — check with your local council or refer to MBIE Building Performance for guidance on fire-rated door assemblies. Always confirm consent requirements with your council before starting any work you're unsure about.
When to Call a Professional
Call a qualified joiner if:
- The door frame is damaged, rotten, or out of square
- You're working on a fire door or an external door in a high-security or weathertight application
- The door has dropped significantly and needs planing or re-hanging
- You're replacing hinges on a heavy or oversized door (e.g. a solid hardwood entrance door)
- You're not confident working with chisels around finished timber
A skilled joiner can re-hang a door, repair a frame, and get everything working smoothly in a fraction of the time. You can find qualified local joiners and carpenters on tradedirectory.co.nz.