What Happens When a Wasp Nest Is Treated

Most people have never seen a wasp nest treated, so the whole thing feels like a mystery. You hear a van arrive, someone in a protective suit disappears into the loft or garden, and a short while later it is over. What actually happens in between is fairly simple.

Here is the sequence from start to finish, including the odd things you may notice afterwards. Knowing it in advance also helps you avoid the common mistake of poking at the nest once the wasps start to look sluggish.

Before anyone touches the nest

The first job is a proper look. A technician needs to know where the nest is, what it is made of, how big it has grown and how the wasps are getting in and out. A nest in a loft, a wall cavity, a shed, a hedge or an old air brick can each need a slightly different approach.

They will also check that the insects really are wasps. Bees are a different matter and are not something Essex Pest Solutions would treat. If a colony turns out to be honey bees or bumblebees, the right move is to contact a local beekeeper or follow bee guidance instead.

Access matters too. The technician will want to know about children, pets, nearby windows and anyone who is allergic to stings, so the work can be planned around them.

• Where the nest is and how it can be reached safely
• Whether the colony is wasps, not bees
• Who and what is nearby, including children and pets
• Which route the wasps use to come and go

The treatment itself

Professionals use products and protective equipment that are not available to the public, and they apply them to the nest entrance or into the nest cavity. The aim is for returning workers to carry the treatment inside, so the colony is affected as a whole rather than just the wasps in the air at that moment.

The nest is usually left in place at the time of treatment. Knocking it down while it is active is exactly how people get stung, and it is not part of a sensible job. The visit itself is often fairly short.

What you will see over the next few days

Do not expect silence straight away. Wasps already out foraging return to the nest and meet the treatment, so activity can continue for a day or so before it fades. You may see slow, disoriented wasps near the entry point, or a few drifting indoors towards a window.

Dead wasps may fall inside a loft, a cavity or a shed. That is normal and is a sign things are working. Keep children and pets away from the area until the technician says it is fine, and never try to block the entrance, because wasps that cannot get out will look for another way, often into the house.

• Reduced traffic at the entrance within a day or two
• Sluggish or dying wasps near the nest
• A few stray wasps indoors, usually heading for windows
• Leave the entrance open and the nest undisturbed

What happens to the nest afterwards

Wasp nests are made of chewed wood fibre, a paper-like material, and a nest is not reused the following year. Once the colony has died, an empty nest in a loft or cavity is generally harmless and can be left, though a technician can advise on whether it is worth removing in your situation.

If there is a visible nest in a spot where it will bother you, such as a shed roof, the technician can talk through your options once the colony is dead.

If wasps are still active well beyond a few days, or you spot a second entrance, let the technician know rather than investigating yourself. Occasionally a second nest has been built close by.

Frequently asked questions