Bed bug treatment, and what each method really costs you

Confirmed identification before anything is booked

Bed bug treatment is expensive and disruptive, and bites alone are not a diagnosis — plenty of things bite and reactions differ hugely between people. A technician should find physical evidence: live insects, cast skins, eggs or faecal spotting. Some companies use trained detection dogs.

Watch for: A quote issued from a description of bites over the phone. Insist on evidence, and keep any insect you catch in a sealed bag for identification.

Mapping the infestation across the whole dwelling

Bed bugs spread outward from where people sleep and sit — beds, sofas, recliners, adjoining rooms, and along shared walls in multi-unit buildings. The inspection defines the treatment area, and an area drawn too small guarantees failure.

Watch for: Treating one bedroom in a house where someone has been sleeping on the sofa to escape the bites. That sofa is now part of the infestation.

Choosing heat or a chemical protocol

Heat treats an entire room or dwelling in one session and reaches harbourage that products cannot be applied into. A chemical protocol is applied to harbourage in stages and leaves residual activity behind. Some jobs combine them — heat for knockdown, residual product at the edges.

Watch for: Heat sold purely on "one and done". Its real weakness is that it leaves no residual, so if a source of re-introduction persists — a neighbouring unit, a commute, a workplace — you can be re-infested the day after a successful treatment.

Preparation — your largest hidden cost

You will be given a preparation list: laundering and bagging textiles on a hot cycle, emptying furniture, moving items away from walls, and for heat, removing anything that cannot tolerate high temperatures — candles, aerosols, pressurised containers, some electronics, medications, musical instruments, vinyl.

Watch for: Preparation is the most common reason a treatment fails, and the most common reason a re-service claim is denied. Get the list in writing before booking and be realistic about whether you can complete it.

Treatment day

For heat, the dwelling is vacated, equipment brings the space up to temperature, air is circulated to reach voids, and monitored sensors track the room. For a chemical protocol, harbourage is treated methodically — bed frame joints, mattress and box spring seams, furniture, skirting, and cracks in the surrounding structure.

Watch for: Heat treatment without sensors placed in the hard-to-reach spots. The cold spot behind a heavy piece of furniture against an exterior wall is exactly where survivors survive.

Encasements and monitors

Mattress and box spring encasements trap anything remaining inside and make future inspection far easier. Interceptor cups under the bed legs both monitor and reduce climb-up. These are cheap and disproportionately useful.

Watch for: An encasement that is torn, or removed before the recommended period. It only works while it stays sealed.

Follow-up visits and verification

A chemical protocol needs repeat visits, in part because eggs are more resistant than adults. Even a heat job should be followed by a verification inspection — this is your evidence that the treatment worked.

Watch for: No verification visit offered. Without it, "no more bites" is the only measure, and bites are an unreliable indicator because reactions vary and some people never react.

Closing off the source

Treatment resolves the infestation you have. Whether it stays resolved depends on where they came from — an adjoining unit, a workplace, regular travel, second-hand furniture. In shared buildings this needs a building-level response.

Watch for: Repeated treatment of one unit in a building with an untreated neighbour. That is a recurring bill, not a solution.