Signs of Outdated Wiring
Not every old house needs an immediate full rewire, but there are several warning signs worth taking seriously.
You may need an electrical inspection if you notice:
Frequent tripping of fuses or circuit breakers,
Flickering or dimming lights
Buzzing, crackling or unusual smells around sockets or switches,
Discoloured, damaged or warm sockets,
Too few sockets for modern appliances,
Old-fashioned switches, sockets or accessories
Fabric-covered, rubber or otherwise outdated cables,
A very old or obsolete fuse board,
Evidence of DIY electrical work,
No recent electrical inspection or certification.
If you're unsure about the condition of your wiring, an inspection is the best place to start. An electrician can assess the existing installation and advise whether repairs, upgrades or a complete rewire are appropriate.
What A Full Rewire Involves
A full rewire means replacing the property's existing electrical wiring and upgrading the installation where required.
Depending on the property, this can include:
New cables and circuits,
New sockets and switches,
New lighting circuits and fittings,
Kitchen and appliance supplies,
Bathroom electrical supplies,
Outdoor electrical points,
Smoke and heat alarm wiring,
Data, TV or other low-voltage cabling where required,
A new or upgraded consumer unit,
Full testing of the completed installation.
A rewire is normally carried out in stages, rather than everything being completed at once.
The aim is to leave you with an electrical installation designed around the way you use your home today — rather than the way it was used decades ago.
Step 1: First Fix
The first fix is where the new electrical infrastructure is installed.
This is generally the messier stage of the project.
Walls, floors and ceilings may need to be opened so cables can be routed to their required locations. Back boxes are installed for sockets and switches, and cables are run back to the appropriate circuits.
At this stage, we can also plan for:
Socket locations,
Lighting positions,
Kitchen appliances,
Electric showers,
Heating controls,
Internet/data points,
External lighting,
Future electrical requirements.
Good planning at first fix is important because moving a socket or cable after the walls have been finished is considerably more disruptive.
Step 2: Plastering
Once first fix electrical work is complete, the areas opened up for the new wiring can be made good.
This may involve:
Filling chases,
Repairing damaged plaster,
Patching walls,
Preparing surfaces for decoration.
The exact level of making good depends on the property and the agreed scope of work.
In older Dublin houses, particularly properties with lath-and-plaster or delicate original finishes, additional care may be needed.
It's worth discussing plastering and decorating before work begins so everyone is clear about what is included.
Step 3: Second Fix
Once the walls and ceilings are ready, the second fix takes place.
This is when the visible electrical accessories are installed.
Depending on your specification, this can include:
Sockets,
Switches,
Light fittings,
Downlights,
Extractor fans,
Smoke and heat alarms,
Appliance connections,
External accessories.
This is also when the installation starts to look like a finished electrical system rather than a building site.
Step 4: Consumer Unit Replacement
A rewire will often involve replacing or upgrading the property's consumer unit.
The consumer unit is effectively the central distribution point for the home's electrical circuits.
A modern installation may require appropriate protective devices and circuit arrangements based on the property's requirements and the applicable Irish electrical standards.
A consumer-unit upgrade may also be appropriate even where a full rewire isn't required.
The right solution depends on the existing installation, the condition of the wiring and the requirements of the property.
Step 5: Testing and Certification
Testing is a critical part of the job — not an optional final step.
Once the electrical work is complete, the installation should be thoroughly inspected and tested to verify that the circuits and protective measures are operating correctly.
The appropriate certification/documentation should then be provided for the completed work.
This gives you a record of the electrical work carried out and provides important information for future maintenance, renovation or property transactions.
Never choose an electrician based solely on price. Make sure testing, certification and the agreed scope of work are clearly included in the quotation.
Timeframe
Every house is different, so there isn't one fixed timeframe for a rewire.
The rewire can be affected by:
Size of the property.
Number of circuits.
Number of sockets and lights.
Condition of the existing wiring.
Accessibility of walls and floors.
Plastering requirements.
Kitchen or bathroom renovations.
Whether the property is occupied.
Changes requested during the project.
Before work begins, you should receive a clear indication of the expected programme and any factors that could affect it.
What Happens To Furniture & Floors?
This is one of the biggest concerns homeowners have.
Rewiring can involve lifting floorboards, accessing ceilings and chasing walls, so some disruption is unavoidable.
Before work begins, furniture should generally be moved away from working areas.
Floor coverings may need to be lifted where cables need to pass underneath.
A good rewire should be planned to minimise unnecessary disruption.
We recommend discussing:
Which rooms will be worked on first,
What furniture needs to be moved,
Whether floorboards need to be lifted,
Protection of floors and furnishings,
Access requirements,
Making good after the electrical work.
The more preparation carried out before the first cable is installed, the smoother the project tends to be.
Rewiring Older Houses
Older Dublin properties can present their own challenges.
Period and traditional homes may have:
Older wiring systems,
Limited access behind walls,
Original plasterwork,
Timber floors,
Extensions added at different times,
Previous DIY modifications,
Electrical installations that have been altered over several decades.
This doesn't necessarily mean a rewire will be difficult, but it does mean the property should be assessed properly before work starts.
Older houses need a practical approach that balances modern electrical requirements with care for the existing building.
Apartment vs. House Rewire
Rewiring an apartment can be different from rewiring a house.
Access to floors, ceilings and walls may be more restricted, while there may also be considerations around:
Communal areas,
Management-company requirements,
Fire safety arrangements,
Shared electrical infrastructure,
Neighbouring apartments,
Access hours,
Restrictions on drilling or chasing,
A house generally gives you more freedom to route new cables and access different areas of the property.
If you're planning a rewire in an apartment, check any building-management requirements before work begins.
