You’ve just moved into an older Irish home, and the door knobs are either loose, dated, or not your style. Replacing them is one of the quickest ways to refresh a room — but only if you get the right type for your door’s existing mechanism. In Ireland, that usually means choosing between mortice and rim setups, and matching the standard 44mm or 57mm backset. This guide walks through the types, the replacement steps, and where to buy, so you can get the job done without second-guessing.
Ireland’s housing stock using knob-handle sets: Over 1.2 million · Residential door knobs sold annually in Ireland: Approx. 450,000 · Average cost of a premium internal door knob (Ireland): €15 – €89
Quick snapshot
- Standard spindle for Irish doors: 7.6mm square (Period Home Style buying guide)
- Mortice and rim are the primary lock types used with door knobs in Ireland (Handles 4 Homes)
- Screwfix Ireland delivers door knobs next day to Ireland (Screwfix Ireland)
- Exact spindle length needed for all Irish doors (typically 35mm or 50mm, but varies by door thickness)
- Whether IKEA door knobs fit standard Irish doors without modification — compatibility depends on backset and spindle size
- Compatibility of smart knobs with Irish latch systems is not fully documented
- No major industry changes expected — replacement remains a straightforward DIY job for most homeowners
- Demand for keyless entry and smart knobs growing in Ireland, but traditional knob-and-latch sets still dominate
Here are the key specifications for door knobs in Ireland.
| Specification | Value |
|---|---|
| Standard backset in Ireland | 44mm or 57mm (Hiatt Hardware guide) |
| Standard spindle size | 7.6mm (5/16 inch) square (Period Home Style buying guide) |
| Most popular finishes in Ireland | Satin Nickel, Matt Black, Polished Chrome (Handles 4 Homes) |
| Top Ireland retailer (Proline Hardware) | Stocking over 20 styles of knobs and handles (Door Handles Ireland) |
| Dummy knob function | Non-turning, decorative only (The Knobbery) |
| Keyed entry sets | Key-operated lock in knob for external doors (The Knobbery) |
What Types of Door Knobs Are Used in Ireland?
“For mortice type latch/lock, all of its door knobs will fit.” — Period Home Style
Mortice Door Knobs
- Mortice knobs work with a lock or latch set into the edge of the door. They require a traditional mortice lock with a deadbolt (Period Home Style buying guide).
- For mortice mechanisms, all door knobs from most suppliers will fit because the spindle hole and backset are standardized (Period Home Style buying guide).
Rim Door Knobs
- Rim knobs are designed for surface-fitted rim locks, common on older Irish doors where the lock is mounted on the inside face (Handles 4 Homes).
- Only selected rim knobs will fit rim locks, so check compatibility before buying (Period Home Style buying guide).
Rim knobs are less common in new builds but still widely found in pre-1960s homes. If your door has visible screws on the edge of the door, it’s likely a rim lock — you need a rim knob, not a mortice one. Mixing them up means the knob won’t engage the mechanism.
The pattern: choose the knob type that matches your lock mechanism.
How Do I Replace a Door Knob?
“Replacement handles should match backplate dimensions and rose size so they cover marks and holes left by older handles.” — Hiatt Hardware
Tools Needed: Screwdriver, tape measure, pencil
Replacing a door knob is a 20-minute job with basic tools. You need a crosshead screwdriver (usually No. 2), a tape measure, and a pencil to mark new latch positions if needed.
Step 1: Remove the old knob and latch
- Unscrew the fasteners on both sides of the door. Pull the knobs out of the spindle hole. Then remove the latch system from the edge of the door.
Step 2: Check the backset and latch size (44mm or 57mm standard in Ireland)
- Measure the distance from the edge of the door to the centre of the spindle hole — that’s the backset. In Ireland, internal doors use 44mm or 57mm (Hiatt Hardware guide).
- The latch size (height of the latch plate) should match the old one. If cut-out marks remain, choose a larger latch to cover them (Hiatt Hardware guide).
Step 3: Install the new latch and knob set
- Insert the new latch into the door edge, ensuring the spindle passes through the latch’s square hole. Attach the two knobs on either side and screw them together. Test the latch action before closing the door.
Buying a knob set that doesn’t match your backset means the spindle won’t reach the latch mechanism — or worse, the knob will be too shallow to operate. A 5-minute measurement saves a return trip.
What this means: measuring before buying avoids frustration.
What Is the Difference Between an Internal and External Door Knob?
Three key differences, one pattern: internal knobs rely on a simple latch, while external knobs add a locking cylinder for security.
| Aspect | Internal door knob | External door knob |
|---|---|---|
| Locking mechanism | None or privacy turn/lock (bathroom) | Keyed cylinder with deadbolt or latch (The Knobbery) |
| Security rating | No security requirement | Must resist forced entry; often sold as a ‘keyed entry’ set (Handles 4 Homes) |
| Finish durability | Standard finishes (satin nickel, chrome) | Often weather-resistant finishes like stainless steel or powder-coated brass |
Internal knobs are latch-only or include a privacy lock for bathrooms. External knobs always incorporate a key cylinder. Using an internal knob on an external door leaves your home insecure — the knob can be turned without a key.
The implication: never interchange internal and external knobs.
Where Can I Buy Door Knobs in Ireland?
Proline Hardware Dublin
Proline Hardware stocks over 20 styles of mortice and rim door knobs, available for click-and-collect in Dublin or delivery across Ireland (Door Handles Ireland).
Handles & Hinges Ireland
This retailer offers internal door knobs in multiple finishes — satin nickel, matt black, polished chrome — with fast shipping to Irish addresses (Handles 4 Homes).
The Door Centre
A specialist supplier of doors and ironmongery, with a selection of keyed entry and privacy knob sets.
Knobs and Knockers Ireland
Categories for interior and exterior door knobs, including vintage-style designs (Door Handles Ireland).
Screwfix Ireland
Offers trade-quality door knobs with next-day delivery to most Irish postcodes (Screwfix Ireland).
Delivery costs and minimum order values vary. Proline and Handles & Hinges offer free click-and-collect; Screwfix charge a flat delivery fee. Compare total cost, not just the knob price.
For Irish buyers, the pattern is clear: you can shop online from Irish retailers with confidence, but always verify the backset and spindle specifications match your door — most returns happen because the mechanism doesn’t fit.
Why this matters: picking the wrong knob type costs time and money. A 10-minute measurement saves a return. The right knob transforms a room’s feel without an electrician or carpenter.
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Frequently asked questions
Can I use an internal door knob on an external door?
No. Internal knobs lack a locking cylinder, so they offer no security. External doors require a keyed entry set.
What is the difference between a knob and a handle?
A knob turns (rotates) to operate the latch. A lever handle pushes down. Both can be used on the same latch mechanism, but knobs are traditional in Ireland.
Are door knobs safe for people with arthritis?
Lever handles are easier for arthritic hands. If you must use a knob, choose a larger diameter with a textured grip.
How do I unstick a door knob?
Spray a dry lubricant (PTFE or silicone) into the spindle hole and work the knob back and forth. If the latch is sticking, adjust the strike plate screws.
Do I need a door knob or a lever handle?
Lever handles are easier to operate and more modern. Knobs are preferred for traditional interiors and are often cheaper. Both work with the same latch.
How often should I replace door knobs?
Replace a knob when it becomes loose, the finish wears, or the mechanism no longer works. Average lifespan of a quality knob is 15–20 years.
Are IKEA door knobs compatible with Irish doors?
IKEA knobs use a 7.6mm spindle, but the backset may be metric (40mm) rather than the Irish standard 44mm or 57mm. Check before purchase.
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Alex Nguyen is Editor-in-Chief at BuzzLayer, overseeing editorial standards, publication decisions and corrections.