A Course, Not an Appointment
Chemical treatment works in stages because the insecticide does not reliably kill eggs. The first visit deals with the bedbugs that are there; the eggs hatch over the following days and the young bugs cross the treated surfaces. The second visit, about 10-14 days later, catches what has hatched. Some flats need a third. The London chemical treatment page has the full explanation of how the product works and where it goes.
On an estate, that means booking two or three dates with gaps between them and keeping them. A missed second visit is the most common reason a course does not finish the job, so when you ring we fix both dates at the start rather than leaving the second to be arranged later.
Getting Into the Block
Each visit takes one to two hours inside the flat, but getting there can take planning. Tell us about the entry system, which block and which entrance, and whether the lift is reliable. If the lift is out and you are several floors up, we still come; it just helps to know.
Someone over eighteen needs to be home to let us in and to go through the checks with us. If you work shifts, say so on the phone and we will look for dates that fit both visits. If a relative or support worker is helping you prepare, they are welcome to be there.

Before Each Visit
- Strip the beds and hot-wash the bedding, then keep it bagged until the treatment has dried.
- Clear the floor around the bed and along the skirting, so we can reach the edges and the sockets.
- Empty the drawers of the bedside tables into sealed bags; clothes that can be washed on a hot cycle should be. Deciding what else to clear is covered in the guide on whether clutter makes bedbugs worse.
- Leave the mattress and bed where they are. Dragging them along a walkway or into the lift carries bugs past every door on the way.
- Do not use shop sprays or foggers between visits; they drive bugs deeper into the walls and towards the flats next door.
The Flats Either Side
In a block, your flat shares walls, a floor and a ceiling with others, and pipes and cables run between them. We cannot treat a neighbour’s flat without them asking, but we can tell you what to say. A plain word to the people next door, above and below, asking them to look at their mattress seams and bed frames, costs nothing and may save the course from being undone.
If your housing provider is arranging the treatment, ask them in writing whether they are checking the neighbouring flats too. Many will want to. Who organises and pays depends on your tenancy and on the cause, and we are pest controllers rather than legal advisers; if blame becomes the argument, the guide on when the landlord says you brought them in helps you keep things moving.
Living in the Flat Between Visits
You stay at home throughout. Once the treated surfaces are dry you can use the rooms again, and you go on sleeping in your own bed. That is deliberate: the bed draws the bugs out across the treated areas. Moving onto the sofa or into a relative’s flat usually spreads them to a new place instead.
Expect to see an odd bug in the days after the first visit, often slow or dying. That is not a sign the treatment has failed. Keep a note of where and when, and tell us at the next visit. Bites should settle over the course; for a skin reaction a pharmacist or GP can advise, and for signs of a severe allergic reaction call 999.
When Chemical Is Not the Right Fit
If the bedbugs are in several rooms, or you cannot manage two or three visits, heat may be the better choice even though it costs more. The heat treatment page for Lambeth covers that. Chemical treatment starts from £220 and the figure depends on the number of rooms; ring 0800 955 1018 for it on the phone before anything is booked. The Lambeth bedbug control page covers renting with bedbugs more widely.
← Bedbug Control Lambeth · Bedbug Chemical Treatment London, in full
Bedbug Chemical Treatment Lambeth — Questions
Do I have to leave the flat during chemical treatment?
Only while we are working and until the surfaces are dry. After that you use the rooms as normal and follow the instructions we give you on the day.
Why do I need a second visit if the first one worked?
Because eggs laid before the first visit can still hatch. The second visit catches the young bugs before they breed.
Can you treat my neighbour's flat at the same time?
Only if they, or the housing provider, ask us to. We can give you the words to explain it to them.
What if the lift is broken on the day?
We still come. Tell us the floor and the block so we can plan for the stairs.
Should I throw the mattress out?
No, not unless we advise it. Carrying it through the block spreads bedbugs, and a treated mattress can usually be kept.
How much does it cost?
Treatments start from £220. The figure depends on the rooms involved and is given on the phone before booking.
Bedbug Treatments in Lambeth
Every service has its own page for Lambeth: heat, chemical, hotels, commercial premises and inspections.
Chemical Treatment Advice
The guides that go into bedbug chemical treatment in more depth.

How Professional Chemical Treatment Works
What is actually in a professional treatment, and why it is not the tin from the hardware shop.
Read more →
How Many Treatments Does It Take?
The bedbug life cycle sets the number, not the pest controller. Here is the timetable.
Read more →
What Happens After the Treatment
Day one to week six, what you will actually see, and when to stop worrying.
Read more →
Why Bedbugs Reappear After Treatment
Hatching, survival or re-introduction. Three different problems that look identical.
Read more →
Where Pest Controllers Actually Treat
Why bedbugs choose the places they do, and the places we deliberately leave alone.
Read more →Bedbug Control Across Lambeth
Each area page is written around one situation we deal with.
Tell Us About the Property
Tell us the block and floor, how many rooms have signs, and who arranges repairs for your flat.