How long does house wiring last?

There is no fixed lifespan, but insulation degrades over decades and connections loosen with thermal cycling. Homes wired before 1970 are worth assessing, and anything with cloth or rubber insulation that has become brittle has effectively reached the end of its service life.

Can I rewire just part of my house?

Yes, and it is often the right answer. Kitchens, bathrooms, additions and specific problem circuits are common partial rewires. A good assessment will tell you whether a partial fix genuinely solves the problem or simply postpones a full rewire.

Why do I get a small shock from my light switch?

Current is finding a path it should not have, usually a wiring fault or a failed device. This is not something to tolerate or work around. Stop using the switch and have it investigated promptly.

Eleven Signs Your Home Needs Rewiring | Phase Three Electric Solutions

Electrical wiring does not have a hard expiry date, but insulation ages, connections loosen, and the demands placed on a system built for 1955 do not resemble the demands of 2026.

Here is what to watch for.

1. Two-prong outlets throughout

No third slot means no equipment grounding conductor. Surge protectors will not function as intended, and sensitive electronics have no path for fault current. This is the clearest single indicator of pre-1960s wiring that has never been updated.

2. A fuse box instead of breakers

Not automatically dangerous, but capacity is almost always far below modern needs, and a fuse can be replaced with an oversized one by anyone with a screwdriver.

3. Cloth or fabric insulated wiring

Visible in basements, attics and inside old boxes. Once the covering is brittle enough to flake off when moved, the run has reached the end of its service life.

4. Warm switch plates or outlet covers

Electrical devices should be at room temperature. Warmth means resistance at a connection, and resistance means heat building inside a wall cavity. This warrants a same-week call.

5. Lights that dim when appliances start

A brief flicker when a large motor starts can be normal. A noticeable, sustained dimming every time the air conditioner or refrigerator compressor kicks in means the circuit or the service is struggling.

6. Breakers that trip during ordinary use

If normal household activity trips breakers regularly, the circuit layout no longer matches how you live. Often solvable with dedicated circuits rather than a full rewire.

7. Buzzing from outlets, switches or the panel

Electricity should be silent. A buzz or crackle is arcing, and arcing generates heat at a point you cannot see.

8. Discolouration or scorch marks

Brown or black staining around outlet slots, or yellowing of the faceplate, means heat has already occurred there. Stop using that outlet.

9. Extension cords doing permanent work

If cords run under rugs, along baseboards or behind furniture permanently, the house does not have enough outlets in the right places. Extension cords are temporary equipment being asked to do permanent duty.

10. Any of the smells

Burning, acrid, fishy or a "hot plastic" odour with no obvious source. Overheating PVC insulation has a distinctive smell that people describe as fishy. Treat all of these as urgent and call an emergency electrician.

11. Mild shocks from switches or appliances

A tingle when touching a switch plate, appliance casing or faucet indicates current flowing where it should not. This is never acceptable and never something to live with.

What to do about it

One item on this list does not mean a whole-house rewire. Several together, particularly in a home built before 1970, means you should get it assessed properly.

A rewire assessment should tell you what is urgent, what should be planned within a year or two, and what is genuinely fine as it is. Anyone who inspects your home and finds only the most expensive possible answer is worth a second opinion.

Read more about whole house rewiring, or call (833) 652-8933 for an assessment.

Eleven Signs Your Home Needs Rewiring