Treatment Timeline

How long does bed bug heat treatment really take?

One day. That is the short answer for almost every domestic property we treat across London, Hertfordshire, Essex, Kent, Surrey, Buckinghamshire, Bedfordshire and Cambridgeshire. The long answer depends on the size of the property, how furnished the rooms are, and how quickly the structure and contents reach lethal core temperature. This guide walks you through the real timeline — what happens hour by hour, what affects the duration, and when you can move back in and sleep in your own bed again.
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The honest one-line answer

For a typical UK flat or house, a complete bed bug heat treatment takes 6 to 11 hours on site, with the lethal kill window (50–60°C held across every harbourage) lasting roughly 2 to 3 hours of that. You will need to vacate the property for the full day.

Hour-by-hour: what a treatment day looks like

Hour 0 — Arrival and inspection

We arrive in an unmarked van so neighbours are none the wiser. The technician does a 15-minute walk-through to confirm harbourage points, flag any heat-sensitive items you may have missed, and decide where to place the industrial electric heaters and high-velocity fans.

Hour 0–1 — Setup and equipment placement

Heaters are positioned for even coverage. Wireless temperature sensors are placed inside mattresses, behind headboards, inside wardrobes, under sofa cushions and along skirting boards — the exact spots bed bugs hide. We monitor these in real time so we know the core (not just the air) is reaching lethal temperature.

Hour 1–3 — Ramp-up

Air temperature climbs to 55–60°C. Furniture, mattresses and structural voids absorb heat more slowly than air, so this phase is about pushing heat into the contents, not just around them. Fans constantly circulate so there are no cold pockets.

Hour 3–6 — The kill window

Once every sensor reads above 50°C, the lethal clock starts. Adults die within minutes. Eggs — the hardest life stage to kill — need sustained heat, which is why we hold the kill window for 2–3 hours. This is the stage that makes heat treatment a true one-and-done solution.

Hour 6–8 — Cooldown and pack-down

Heaters off, fans on, doors and windows opened. The structure cools to a safe touch temperature within an hour. We pack equipment, walk the property with you (or send photo/video confirmation for landlords), and hand you a written report and 6-month guarantee certificate.

What changes the timeline

  • Property size. Each extra bedroom adds roughly 60–90 minutes of ramp-up and cooldown.
  • Furniture density. A heavily furnished Victorian flat in Camden (NW1) or Islington (N1) holds more thermal mass than a minimalist new-build in Stratford (E15) and takes longer to bring up to temperature.
  • Building fabric. Solid brick (common in Hackney E8, Tower Hamlets E1, Westminster SW1) absorbs more heat than timber-frame new-builds in Milton Keynes (MK9) or Bedford (MK40).
  • Outdoor temperature. In winter the building loses heat to the outside faster, adding 30–60 minutes. We compensate with additional heater capacity.
  • Access. Top-floor flats with no lift, narrow stairwells in Westminster mansion blocks, and restricted parking in Kensington can add 20–40 minutes of setup.

How fast can we actually get there?

Our crews are based for rapid response across London and the Home Counties, which means same-day arrival is the norm for emergency bookings. Typical response windows:

  • Inner London (Camden NW1, Westminster SW1, Islington N1, Hackney E8, Southwark SE1) — 1 to 3 hours.
  • Outer London (Croydon CR0, Bromley BR1, Ealing W5, Romford RM1) — 2 to 4 hours.
  • Hertfordshire (Watford WD17, St Albans AL1, Hemel Hempstead HP2) — 2 to 4 hours.
  • Essex, Kent and Surrey — 3 to 5 hours, often same-day depending on call time.
  • Bedfordshire, Buckinghamshire and Cambridgeshire — same-day or first-thing next morning.

When you can move back in

As soon as we sign the property off and surfaces are safe to touch — usually within 60–90 minutes of shutdown. There is no chemical residue, no smell, no airing-out period and no need to wash anything that was inside during the treatment. The bed is immediately safe to sleep in that night.

Where we deliver this service

We respond across London and the Home Counties on the same day. Click any location below for postcode-level coverage, response times and pricing for that exact area.

See all areas we cover

Frequently asked questions

How long does a one-bedroom flat take?

Typically 6–8 hours on site from setup to pack-down. The lethal core temperature (50–60°C across every harbourage) is usually held for 2–3 hours within that window.

How long for a two or three-bed house?

Two-bed flats and small terraces run 7–9 hours. Three-bed semis and townhouses run 8–11 hours depending on furniture density, soft furnishings and how many storeys we have to balance heat across.

How long for a single room or HMO bedsit?

A single bedroom or HMO room is usually 4–6 hours including setup, treatment and cooldown — ideal for landlords who need a fast turnaround between tenants.

Do I need to be out of the property all day?

Yes. Plan to vacate from arrival until we confirm cooldown — usually a full working day. Pets, plants and heat-sensitive items must be removed before we start.

How quickly can you actually arrive?

We operate 7 days a week across London and the Home Counties and aim to be on site the same day for emergency bookings, often within 2–4 hours of your call.

How long until I can sleep in the bed again?

Once we sign off and the room has cooled to a safe touch temperature (typically 60–90 minutes after shutdown), the bed is immediately safe to use. There is no chemical residue and no airing-out period.

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