Pest Control
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Wasp control in London
A wasp nest is usually straightforward to treat and genuinely risky to disturb. The judgement is in how it is reached, not what is applied.
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The problem
What you are dealing with
A wasp nest starts in spring as something the size of a golf ball, built by a single queen. Through the summer it grows into a papery structure that can hold thousands of workers by August and September — which is exactly when most calls come in, because that is when the colony is largest and the workers are most defensive.
In London houses the nest is most often in a loft, in a soffit or fascia void, behind a bargeboard, inside a cavity wall reached through an airbrick, under roof tiles or in a shed or garage. Sometimes it is in the ground, in a bank or an old burrow. The steady stream of wasps entering and leaving one fixed point is the giveaway.
Wasps defend the nest. Unlike a bee, a wasp can sting repeatedly, and a disturbed nest can produce a mass response. For anyone with a known sting allergy, or where a nest is beside a door, a bedroom window or a play area, it is not something to experiment with.
Signs to look for
Signs of wasps in a property
What points to an active nest rather than passing wasps:
- A continuous two-way stream of wasps in and out of one fixed point — an airbrick, a gap under the eaves, a hole in the ground
- A grey, papery, layered structure visible in a loft, shed, garage or under the eaves
- A large increase in wasps indoors, particularly in an upstairs room or near a loft hatch
- A faint rustling or tapping from a cavity, ceiling or loft space on a warm day
- Wasps chewing at fence panels, sheds or bare timber — they use the fibres as building material
- Aggressive behaviour from wasps near one particular part of the building
Why it needs doing properly
Why professional treatment may be needed
Almost every serious wasp incident starts with someone approaching a nest without the right protection, or treating it from a ladder. A disturbed colony responds in numbers, and a sting reaction on a ladder is a fall as well as a sting.
Blocking the entrance is a common instinct and a poor idea — the colony usually finds another way out, and in a cavity wall or roof void that new route can end up inside the building rather than outside it.
A shop-bought aerosol also tends to reach only the wasps at the entrance rather than the nest itself, which leaves the colony intact and considerably more defensive than it was.
A professional treatment is applied at the nest entrance in protective equipment, so returning foragers carry it in and the colony is dealt with properly.
What the inspection involves
- We locate the actual nest rather than working from where wasps have been seen, since the flight line and the entry point are often several metres apart.
- We assess safe access — height, roof pitch, ladder footing, loft access, and what is directly below the nest.
- We check how close the nest is to doors, windows, footpaths and any area people use regularly.
- We ask about sting allergies in the household or workforce before deciding how the treatment is carried out and what you need to do during it.
How the treatment works
- Treatment is applied at the nest entrance so returning workers take it into the nest, which deals with the colony rather than the wasps at the surface.
- Activity around the entrance often increases briefly before it drops. That is expected — we will tell you how long to stay clear and which windows to keep shut.
- Where a nest can be safely removed after treatment we will say so; where removal would mean opening up a cavity or roof structure, we will explain that rather than cause damage.
- An untreated nest is not reused the following year, but the same sheltered location often attracts a new queen, which is worth knowing when you think about proofing.
Open 24 hours
Dealing with wasps? Talk it through with us.
Call and describe what you have found. We will tell you what it is likely to be, what the inspection would involve and what happens next. The line is open 24 hours.
Open 24 hours · London and nearby areas
Preventing it happening again
Treatment deals with what is there now. These are the things that reduce the chance of it coming back.
- Check lofts, sheds and eaves in spring for small early nests — they are far easier to deal with in May than in September.
- Fit mesh to airbricks and close gaps at soffits, fascias and bargeboards where you can do so safely.
- Keep bin lids closed and clear fallen fruit, which draws foraging wasps in late summer.
- Cover food and sweet drinks outdoors in August and September, when workers switch to sugar.
- Do not block a nest entrance — the colony will look for another route, and that route may come out indoors.
Wasps in London properties
Loft conversions and older roofs across London give wasps plenty of options — soffit voids, gaps behind fascias, open airbricks and the junctions where an extension meets the original roofline. Terraced rows also mean a nest under one set of eaves is often close to a neighbour's bedroom window, so access and timing get discussed alongside the treatment itself.
- Wasps in Hammersmith
- Wasps in Fulham
- Wasps in Chiswick
- Wasps in Kensington
- Wasps in Chelsea
- Wasps in Earls Court
- Wasps in Notting Hill
- Wasps in Bayswater
- Wasps in Mayfair
- Wasps in Central London
- Wasps in Wandsworth
- Wasps in Mitcham
- Wasps in Gerrards Cross
EVO Pest Control works across London and nearby areas, in homes and in commercial premises, from 1 Fulham Palace Rd, London W6 8AB.
Areas we coverQuestions
Wasps — common questions
If your question is not here, call and ask. It is a quick conversation and it usually saves a visit either way.
07886 109682A wasp nest is grey and papery, built in layers, usually in a void or cavity. Honeybees build waxy comb and a swarm looks like a dense hanging cluster. It matters, because bees are treated very differently — see our bee control page.
Please do not. A blocked colony tends to find another route, and in a cavity wall or roof void the new exit can come out inside the building. It also makes the remaining wasps considerably more defensive.
No — a nest is used for a single season and is not re-occupied. But the same sheltered spot often attracts a new queen the following spring, which is why proofing the gap is worth doing.
By August the colony is at its largest and the workers switch from hunting insects to seeking sugar, which brings them to bins, fallen fruit and outdoor food. They are also more aggressive at that point in the season.
Tell us when you call. It changes how we plan access and timing, and what we ask you to do during and immediately after the treatment. Keep everyone well away from the nest in the meantime.
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