The short answer
Real fumigation means a toxic gas in a sealed space, handled only by qualified fumigators, and it is very seldom used against bed bugs in British homes. When firms or people say fumigation for bed bugs, they usually mean a professional spray course, fogging, or heat treatment. Shop-bought foggers have been shown in research to do little against bed bugs.
“Fumigation” is one of the words people search most when they have bed bugs. It sounds thorough: seal the house, fill it with something deadly, and every bug dies. The reality in the UK is different, and knowing what the word covers stops you paying for the wrong thing.
What fumigation actually is
In pest control, fumigation means filling a sealed space with a toxic gas, a fumigant, and holding it there long enough to kill insects inside everything, including furniture and wall cavities. It is used for things like shipping containers, grain stores, timber and museum objects.
Because the gases are dangerous to people, the Health and Safety Executive treats fumigation as a specialist, high-risk activity. Fumigators must be trained and qualified, the space has to be sealed and monitored, and nobody can go back in until the gas has been cleared and tested. The BPCA and HSE have published a joint statement on the qualifications fumigators need.
Gas fumigation of whole buildings for bed bugs does happen in some countries, notably the United States. In the UK it is rarely used for bed bugs in homes, because a terrace or a flat cannot easily be sealed from its neighbours, and safer methods work.
What people usually mean by fumigation
When a firm or a friend talks about “fumigating” for bed bugs, they usually mean one of these:
| What it is | How it works | Used for bed bugs? |
|---|---|---|
| Professional spray course | Residual insecticide applied to seams, joints, skirting and furniture, often with steam, over two or three visits | Yes, the most common method |
| Professional fogging or misting | A fine mist of insecticide applied by a technician, usually as an addition to targeted spraying | Sometimes, as a supplement |
| Heat treatment | Rooms and furniture heated to 50°C or more and held there | Yes, kills every stage in a day |
| True gas fumigation | A sealed building or container filled with fumigant gas | Rarely in UK homes |
| Shop-bought fogger or “bug bomb” | An aerosol can that empties into the room | Research shows it does little |
Why bug bombs do not work on bed bugs
A study by Ohio State University in 2012 tested three fogger products sold to the public against bed bugs collected from homes. The foggers had little or no effect on bugs that were hiding, because the mist settles on open surfaces and does not get into the seams, cracks and fabric where bed bugs actually live.
There is a second problem. Foggers can drive bugs deeper into hiding or into other rooms, which makes the infestation larger and the eventual professional treatment harder and dearer. They are also a fire risk if used near a pilot light or a spark.
The BPCA tells householders not to tackle bed bugs with pesticides themselves, and the NHS describes them as very difficult to clear without a professional.
Heat: the nearest thing to fumigation
If what you want is the effect people imagine from fumigation, every bug and egg in the room dead in one go, heat treatment is the closest real option. A specialist raises the room and its contents above the temperature bed bugs can survive and holds it there. The BPCA target is 50°C for two hours, or 52°C for one hour, measured inside the furniture where the bugs hide.
Unlike a gas, heat leaves nothing behind. That is good for people who want no chemical on the bed, but it means there is no lasting protection if bugs come back in on luggage or from a neighbour. Some firms add a residual spray around the edges for that reason. Our heat treatment page sets out how the day runs, hour by hour.
What to ask if a firm offers fumigation
If a quote mentions fumigation, ask:
- What exactly will you use? A gas, a professional mist, a residual spray or heat?
- Who carries it out, and what qualification do they hold? True fumigation needs a qualified fumigator.
- How long must we stay out, and how will you check it is safe to return?
- How many visits are included? A mist or spray rarely kills eggs, so expect a follow-up.
- What happens to the neighbours? In a flat or terrace, gas or mist can travel.
A firm that cannot answer these clearly is not one to let into your home with toxic products.
The practical choice in Birmingham
For most Birmingham homes the choice is between a spray course and heat. A spray course is cheaper and leaves a residue that keeps working; heat is faster, costs more and leaves nothing behind. Our cost and schedule planner shows typical prices for each by size of home and puts dates on the visits.
If you would like a specialist to recommend a method after seeing your home, send a request below.
Where our information comes from
- Health and Safety Executive: Fumigation
- British Pest Control Association: Fumigation qualification, joint HSE and industry statement
- Ohio State University: Over-the-counter foggers ineffective against bedbugs (2012)
- British Pest Control Association: Everything you need to know about heat treatments for bed bugs
- British Pest Control Association: Code of Best Practice for Bed Bug Management and Control (December 2020)