Scratching in the ceiling and a breaker that keeps tripping? Here is how to tell if rats have reached the wiring, and what to do.
Rats in the ceiling gnaw cables to wear down their teeth, and stripped wiring in a roof space is a real fire risk. Signs include a breaker or RCCB that keeps tripping, lights or sockets that stop working, flickering, a burning smell, and droppings or gnawed insulation near cables. Switch off the affected circuit, do not handle the wiring, and have a wireman registered with Suruhanjaya Tenaga inspect and repair it, while the rats are dealt with and their way in is sealed. On our guides a roof-void rat job is RM300–RM800 and a basic electrical safety check RM150–RM400 (indicative 2026, Klang Valley).
A rat's front teeth never stop growing, so it gnaws constantly to wear them down, and electrical cable is a favourite. Roof rats climb into Malaysian roofs from trees, overhead cables and wall cavities, then nest in the warm, quiet space above the ceiling, right where lighting, fan and socket cables run. Our rat and rodent control guide explains how they get in.
Cables that run loose on top of the ceiling boards are the easiest to reach. Suruhanjaya Tenaga's guideline, as quoted on our outdoor socket guide, requires wiring inside a house to run in conduit or trunking; loose, unprotected cable in an older roof space is exactly what rats find first.
| Sign | What it can mean | What to do |
|---|---|---|
| Breaker or RCCB trips, especially at night or in rain | Bare conductors touching each other or damp | Switch off that circuit and get it checked |
| Lights, fan or sockets on one circuit stop working | A cable chewed through | Leave it off; do not keep resetting |
| Flickering lights or buzzing | A loose or partly chewed conductor | Switch off and have it inspected |
| Burning or hot plastic smell | Overheating at damaged insulation | Switch off at the main board and get help urgently |
| Droppings, gnawed insulation or shreds near cables | Rats active along the cable runs | Treat the rats and check the wiring |
Scratching and running in the ceiling at night is the most common first sign of rats. If you hear it and also see any of the electrical signs above, treat it as urgent.
A proper check starts at the distribution board: which circuits trip, what they feed, and how old the installation is. The wireman then opens the ceiling at access points, follows the cable runs through the roof space and looks for gnawed insulation, exposed copper, droppings and nesting. Instrument tests on each circuit show whether the insulation is still sound where it cannot be seen. Our electrical safety inspection guide explains the difference between a visual check and a full test with a written report.
The work must be carried out and certified by a wireman registered with Suruhanjaya Tenaga.
| Situation | Usual repair | Notes |
|---|---|---|
| One or two short sections chewed | Replace the damaged section, properly joined in an enclosure | Only if the rest of the circuit tests sound |
| Several sections on one circuit | Rewire that circuit | Run the new cable in conduit or trunking |
| Old wiring with damage in many places | Partial or full rewire | Often due anyway on an old installation |
| Protection devices old or missing | Upgrade the board and RCCB | Discuss with the wireman at the same time |
Taping over a chewed cable and closing the ceiling is not a repair. Damaged sections should be replaced, and new cable in the roof space should run in conduit or trunking so it is protected if rats return. Our house rewiring cost guide covers partial and full rewiring.
Repairing the wiring without dealing with the rats only resets the clock. The lasting fix is proofing: cutting back branches that touch the eaves, sealing gaps at the eaves, soffits and where services enter, and trapping the rats already inside. Poison alone rarely solves it. Our pest control services guide explains why proofing matters more than baiting.
Clean-up matters too. Our rat control guide notes that rodents and their urine and droppings carry diseases including leptospirosis and salmonella, so droppings and nesting material in the roof space should not be swept up dry or handled bare-handed. Whoever does the clean-up should wear gloves and a mask, dampen the droppings first and bag them, and the ceiling boards should be checked for staining before they are closed up or repainted.
Doing it in this order means the new wiring is not chewed again, and the ceiling is only opened and closed once.
In a rented home, tell the landlord in writing as soon as you notice tripping, dead circuits or rats in the ceiling: wiring and the roof are normally the owner's responsibility. For owners, ask your insurer whether damage caused by rodents is covered under your policy; many policies treat vermin damage differently from sudden events, so check the wording rather than assume.
These are indicative Klang Valley ranges for 2026 from the ClickBina guides named in the sources section. The wiring repair itself is quoted after inspection, because it depends on how much cable is damaged.
| Item | Indicative price | Source guide |
|---|---|---|
| Ceiling or roof-void rat job (access, trapping, proofing the eaves) | RM300 – RM800 | Rat and rodent control guide |
| Initial proofing and baiting (home) | RM200 – RM500 | Rat and rodent control guide |
| Basic visual electrical safety check (condo or small unit) | RM150 – RM400 | Electrical safety inspection guide |
| Full electrical inspection and test report (landed home) | RM400 – RM900 | Electrical safety inspection guide |
| Partial rewiring, per area or circuit | From RM1,500 | House rewiring cost guide |
WhatsApp us your job details for a quote — we reply within the hour.
💬 WhatsApp for a quoteClickBina is an experienced KL & Selangor contractor handling whole-house refurbishment and trade coordination, so the rodent work, the electrical repair and the ceiling can be planned in the right order. WhatsApp us your job details for a quote: the property type, which circuits are affected and what you have noticed in the ceiling. We reply within the hour, the price we agree is a flat price with no hidden charges, and a site visit is RM150, waived if you go ahead.
How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina guides named above. They are indicative Klang Valley market ranges for 2026, not fixed rates.
WhatsApp us your job details for a quote — we reply within the hour.
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