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How often should a house be rewired?

22 Answers

Answered by Baggaley Electrical Services

18th February 2020

Baggaley Electrical Services answered the question "How often should a house be rewired?"

If your home is more than 40 years old or so and has not had any major rewiring done in that time, then it may require a rewire to make sure its safe. Signs that your wiring may be old is if the cabling is covered in fabric or rubber rather than uPVC, and if the consumer unit (often called the fuse box) has large ceramic switches. If you suspect your wiring is old, you can ask an electrician to do a full inspection of your wiring to recommend any work that might need doing.

Answered by Routley & Lemon

14th February 2020

Routley & Lemon answered the question "How often should a house be rewired?"

A house should be rewired if it fails an Electrical Installation Condition Report, if there's a change of use, i.e. more electrical power is needed because of a change of hands, for example or the power output of the property no longer meets the requirements of the user and therefore needs to be rewired to suit.

Answered by R Harris Electrical Services Ltd

3rd February 2020

R Harris Electrical Services Ltd answered the question "How often should a house be rewired?"

It really depends on the quality of the installation and how regularly it has been maintained. Manufacturers of pvc twin and earth will say 40 years before significant degradation of the wiring. However careful consideration should be taken to follow the installers instructions between electrical inspection condition reports. Having regular testing carries out on your installation will show and prevent any significant degrading of the wiring system.

Answered by Hemmings Electrical Services Ltd

13th January 2020

Hemmings Electrical Services Ltd answered the question "How often should a house be rewired?"

I don’t believe there’s an exact timescale that a specific Electrical installation should be re-wired. It’s all down to how well the installation is maintained and monitoring the condition regularly. Signs of over heating, random tripping of RCD’s etc are a good indicator that your installation will need re-wiring. Having condition reports done at the correct intervals is the best way to prolong an installation!

Answered by Keynston Services

2nd December 2019

Keynston Services answered the question "How often should a house be rewired?"

The standard answer seems to around 25 years, but that figure has been bandied around since I was a boy. And a lot has changed since then, materials, household demand, equipment numbers and power consumption. I would say that if there are signs of damage (such as overheating or heat damaged joints), excessive changed & additions, long-term use of extension cables and / or changing internal arrangements within a house then it is a good idea to rewire. A change of ownership might be a good time to review the wiring and the consumer unit and decide whether an upgrade is required.

Answered by Complete-wiring-solutions

24th November 2019

Complete-wiring-solutions answered the question "How often should a house be rewired?"

A house rewire should last 20 or more years, sometimes as long as 40 years, but eventually the insulation on the cables will begin to breakdown and you will need a house rewire.  You can have your wiring checked by an electrician.  However there are not actually any set guidelines for how long a re-wire will last, it’s more to do with how your property has been used and the materials used to carry out the wiring. A lot of older rewires will have used materials which today are deemed not suitable such as lead cabling or tough rubber sheathing. This is why a lot of the advice you will read suggests that you may require a re-wire if your electrics are over 20 years old. This will then ensure your property is up to current regulations. 

Answered by GL Electrical

9th November 2019

GL Electrical answered the question "How often should a house be rewired?"

There are no set guidelines as to when a property should be rewired. Just because your wiring’s old, it doesn’t mean it’s unsafe. Many factors can affect the wear and tear of your electrical installation, including the materials used and how your property has been used. We would advise that a periodic inspection is carried out on owner-occupied properties at least every 10 years and every five years in rented accommodation. The test will certify whether the electrics in a property are safe and tell you if anything needs upgrading. You should carry out regular checks around the house on the condition of your cables, switches, sockets and other accessories. If you notice anything unusual - for example, burn marks on plugs and sockets, sounds of ‘arcing’ (buzzing or crackling), fuses blowing or circuit-breakers tripping - get a registered electrician to check your electrics as soon as possible.

Answered by AJS Essex Electrics

5th September 2019

AJS Essex Electrics answered the question "How often should a house be rewired?"

The average age for a rewire depends on the cable. PVC twin and earth are expected to last 25 years but that doesn't add in factors like damage or overheating. you would need a electrical installation condition report to determine if you need a rewire. The report will point out faults and non compliance to the regulation at the time. sometimes you will find that the cable seems fine and you just need to upgrade certain items. A rewire is determined by the customer at the end of the day.

Answered by RIGS Electrical

12th August 2019

RIGS Electrical answered the question "How often should a house be rewired?"

The average lifespan of an electrical installation is approximately 25-30 years. However, installations beyond this age are not necessarily in need of a rewire. In reality most installations I visit are in excess of 35 years old. At this point I would recommend a regular schedule of inspection and testing (Electrical Installation Condition Report) to verify the ongoing safety of the electrical installation (think of this as an MOT for the fixed wiring within your house). This will identify any faults within the installation and highlight any potential issues arising between scheduled EICR’s.


28th June 2019

STS ELECTRICALS NORTH EAST LIMITED answered the question "How often should a house be rewired?"

The condition of the current installation should be observed carrying out an EICR the age of the wiring and condition 1950s there is a strong chance it will have rubber insulation on the wiring which will perish and start to break down and is likely to fail an insulation test and unlikely to have earthing in the lighting, and the consumer unit which for domestic install should be carried out every 10 years, there are many different opinions about how often you should rewire a house: After a specific time period usually about 25 years. When a specific problem requires the householder to replace the wiring

Answered by Hayer Electrical Ltd

15th June 2019

Hayer Electrical Ltd answered the question "How often should a house be rewired?"

Depends on the condition of the overall installation. Normally anything wired in new should really have at least a 25 year shelf life. However it the current installation is old it does not mean it needs rewiring. As long their are no faults on the circuits and the cables are in good condition then all good imo.

Answered by Thomas Chaney Electrical Services

2nd June 2019

Thomas Chaney Electrical Services answered the question "How often should a house be rewired?"

In my opinion a house should be rewired every 25-30 years. However I have come across properties that are way over this time period and the cabling is still in good condition. The key to the time period is the quality of the equipment used in the system when it was installed. Poor quality cable means it won’t last as long once energised.

Answered by Megaohm

31st May 2019

Megaohm answered the question "How often should a house be rewired?"

Its no rules however this highly depend from condition of the installation. How often was altered or done some additions. Major focus is on inspection every 5yrs Exceptions are for schools and other special locations such as caravan. Domestic occupied by owner should be done every 10yrs. Mentioned inspection will determinate what needs to be done to keep installation up to the current standards and regulation.

Answered by Orman Electrics

18th May 2019

Orman Electrics answered the question "How often should a house be rewired?"

There is no schedule for a rewire. This would come down to the instillation itself and outside Influence It is recommended that a rented domestic property is inspected every 5 years or change of tenancy. Domestic property occupied by owner every 10 years and commercial properties every 5 years. This inspection ( condition report) will determine if a rewire , partial rewire is needed.

Answered by CT Sparks Ltd

3rd May 2019

CT Sparks Ltd answered the question "How often should a house be rewired?"

there’s no Real rule on a schedule of rewires A lot is determined on how well the installation was done in the first place. Electrical installations installed since the 70s in pvc cable had a recommended life of around 25 years. Domestic Installations should be inspected every 10 years which will identify any degrading of the cabling. Commercial premises should be inspected every 5 years. There’s a lot of older installations still in use that are In a potentially dangerous condition

Answered by Karl Chamberlain Electrical Services

17th April 2019

Karl Chamberlain Electrical Services answered the question "How often should a house be rewired?"

A house should be checked every ten years, most electricians recommend 5 years. This is due to ever increasing demand on existing wiring. Its not always the state of wiring that is the cause of concern for faults or fire hazards. some times its down to shoddy workmanship, DIYers altering and adding sockets etc. connections coming loose. A house wired in 1980s, which has had no alterations may not need rewiring for another 20 years. But if Extension leads are being used due to lack of sockets etc, this could be a sign, that this house is not keeping up with the demand of todays requirements and therefor a rewire would be needed . Recommendations that 3 twin sockets are needed as a minimum requirement for todays houses.

Answered by Smart Vision Electrical ltd

24th March 2019

Smart Vision Electrical ltd answered the question "How often should a house be rewired?"

A domestic installation would ideally be rewired after 25 years or so, If you keep having issues with certain circuits or are having major works done to a property. Where older installations have been chopped, changed and added onto over time, it would be best to replace with new and perhaps reduced circuit size to reduce possible issues in the future. If you are to be having any work done on a property it’s always a good time to think about a rewire.

Answered by Electri-Call-Us

23rd March 2019

Electri-Call-Us answered the question "How often should a house be rewired?"

PVC/PVC cables or twin and earth cables have been around since the 70’s these are easily identified as they are stranded cables as opposed to the later PVC/PVC cables that use a solid core conductor. VIR are a vulcanised rubber insulated single cable with a cloth material outer covering run in a metallic black conduit, Then you have black rubber cables. If you have any of the last 2 cable types then your property is definitely in need of a re-wire. PVC/PVC cable was regarded as having a working life of 25Yrs. The best way to tell if your electrical installation is still in a safe condition is to have electrical inspection condition report with detailed written observations and tests carried out, these will vary in price depending on number of circuits but will be between £100-£180, don’t be tricked by companies offering visual inspections as these will not be a comprehensive or thorough inspection but merely based on the type of fuse board and accessories to give an indication of age and condition. Inspections now have to be carried out to the current edition of the regs and reports are based on this criteria. Items are coded C1 immediate danger present, exposed live parts etc, this will result in either the fault is made safe/isolated immediately either by disconnection or removal of fuse on affected circuit. Danger notice issued. C2 potential danger this means that immediate danger is not present but under a fault condition danger could arise. Either of these will result in an unsatisfactory grading of installation. C3 means that there is a non compliance to the current regulations but it is not an immediate or potential danger risk, it is merely an advisory recommendation to bring the installation up to current standard. Example of this would be an RCD protected insulated non AMD 3 metal board made from non combustible material. After testing if wiring is still in good condition rather than re-wiring a fuse board change to a modern AMD 3 board with RCBO protection may be a more affordable alternative to provide latest safety. RCBO protection offers RCD protection of individual circuits so a fault on one circuit will only affect the circuit with the fault rather than tripping the RCD controlling multiple circuits. Surge Protective Devices became a requirement in January 2019 if the risk calculation requires it based on geographical location, overhead supply cables, TT earth electrode, & risk of lightning ground strikes. AFDD or Arc Fault Devices are not as of yet a requirement only a recommendation so you Do Not have them as part of a new consumer unit. AFDD currently are retailing at £120 ea so the cost of a board change jumps from £400/£450 to £1500 for a 10way board.

Answered by Udell Electrical Services

11th February 2019

Udell Electrical Services answered the question "How often should a house be rewired?"

There is no hard and fast rule in terms of when a house needs a rewire. Many years ago rubber butyl cables were installed in houses. Over the years this cable disintegrates and becomes dangerous. If your property has rubber cables still in service then the house needs to be rewired as it’s a safety concern as there could be a risk of fire damage or electrocution due to touching live exposed cables. Newer PVC cables have been used for the last 20 or so years. These generally don’t disintegrate and are much safer than the rubber cables. With the above being said every installation is different and will have been treated differently over the years. It may have been subject to different outside forces such as DIY alterations or attack from rodents and such like. The only real way to determine the safety of the electrical system in your property is to have an Electrical Installation Condition Report (EICR) carried out. The General recommendations periods to have a EICR carries out are listed below although these are just recommendations General house Every 10 years or after severe damage such as fire or flooding Rented properties (landlords responsibility) Every 5 years or change of tenancy

Answered by Electrical Innovations (Derby) Ltd

10th February 2019

Electrical Innovations (Derby) Ltd answered the question "How often should a house be rewired?"

This is all down to how well maintained your installation is. I always advise my customers that their electrics should be checked and if you are planning major works also consider how this will effect you long term. Anything over 25 years is certainly getting towards a needing regular updates to make sure it complies with the latest regulations, but also bear in mind that you never know what previous works were carried out and at what standard.

Answered by RJ Electricians Ltd

9th February 2019

RJ Electricians Ltd answered the question "How often should a house be rewired?"

We used to say around 25years due to the types of cable and connections in use however with the regulations getting firmer and safer as long as the property meets the criteria in the periodic inspection report there in no need to rewire the property. The periodic inspection reports show the condition of your property with the following codes:- C1 immediate danger ie exposed live parts which could cause injury or death C2 in a dangerous condition and could cause injury or death C3 needs improvement ie broken or cracked socket A tick indicates a pass

Answered by Edwards

8th February 2019

Edwards answered the question "How often should a house be rewired?"

There is no straightforward answer here, Guidance has previously suggested 25 years however installations do not expire. Guidance for a domestic installation is that it should be inspected & tested every 10 years privately, 5 years for tenanted properties or in both cases change of occupancy if that is sooner. Landlords must ensure the electrical installation is safe when a tenant moves in and is maintained in a safe condition throughout its duration, in HMO’s (houses of multiple occupation) there is a further legal obligation to carry out a 5 yearly EICR - Electrical Installation Condition Report. Electrical regulations are not retrospective, the inspection and testing procedure is carried out by comparing the installation to the latest regulations at the time of inspection, faults and deviations are coded as follows C1 Immediately Dangerous, exposed bare live cables for example C2 Requires Improvement, a broken switch or socket outlet with no exposed live parts. C3 Improvement Recommended, Missing RCD protection for circuits unlikely to supply portable or mobile equipment outside, with the exception of locations containing a bath or shower. FI Further Investigation, missing or borrowed neutral for a circuit. Any C1, C2 or FI coded items result in an ‘unsatisfactory’ Report being issued. Similar to an MOT failure. There is however no requirement to ‘rewire’ you could for example repair the defects. The number and severity of defects will inform the decision as to whether or not a rewire should be considered.

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