Bedbug Chemical Treatment Bromley

When Room by Room Makes Sense

Chemical treatment suits a house where the problem has stayed put. Typically that is one bedroom, or two that the same people use, with no signs in the other beds, the sofa or the spare room. The residual goes where bedbugs live in those rooms and nowhere else, so you are not paying to treat bedrooms that never had them.

How the insecticide works, where it is applied and why it is a course rather than a single visit is on our London chemical treatment page, for the full explanation. What follows is the part particular to treating some rooms of a house and not others.

Deciding Which Rooms Are In

The line between treated and untreated rooms has to be drawn from evidence. We look for live bugs, eggs, cast skins and spotting, and we also check the rooms either side and any room the same people use. A bedroom where someone has been sleeping to get away from the bites goes on the list for checking even if it looks clean.

If you have found only one bug and are not sure it means anything, the Hayes page on a single bedbug covers that first step. For the question of whether the whole house needs doing instead, see the Orpington page on big family houses.

Keeping the Untreated Rooms Clear

Between the first and second visit, bugs that hatch in the treated room have to cross the residual to feed. That only works if the person they feed on keeps sleeping there. Move out to another bedroom and you give them a reason to follow, and a clean room becomes a new one to treat.

• Keep sleeping in your own bed in the treated room. It feels wrong, but it is what draws them across the treated edges.
• Do not move furniture, bags or boxes out of a treated room into the rest of the house during the course.
• Bag bedding and clothes inside the treated room, carry the sealed bag straight to the washing machine, and hot-wash it. Do not leave it on the landing or in another bedroom.
• Keep the door of the treated room shut when nobody is using it, and keep visitors, children and pets from napping on that bed.
• Leave the skirtings and bed frame alone. Hoovering or wiping the treated edges strips off the residual before it has done its work.

Watching the Other Rooms Between Visits

Use the gap to keep an eye on the bedrooms that were not treated. Once a week, lift the corner of each mattress and look along the seams and the piping, then at the joints of the bed frame and the edge of the headboard. You are looking for small dark spots, pale shed skins or a live bug. The guide to hiding places that get missed shows where to look.

If you find something, do not start spraying or moving things around. Put a bug in a sealed bag or pot if you can, photograph any marks, and tell us before the next visit. The room can then be added to that visit instead of being left for a separate job.

How Many Visits and What It Costs

Residual insecticide does not reliably kill eggs, so a course is usually two visits and sometimes three, about 10–14 days apart. Each visit takes one to two hours for the rooms being treated, and you are back in once the surfaces are dry. The guide to how many treatments it takes explains when a third is needed.

Treatments start from £220. The figure depends on how many rooms are in the course, and you have it on the phone before anything is booked. Chemical costs less than heat for the same rooms, which is much of the reason to treat room by room with it. Where the evidence covers most of the house, or repeat visits are hard for the household, our heat treatment page for Bromley covers the other route. The Bromley borough page has the wider picture.

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