Wasp Nest in a Cavity Wall – How Professionals Treat Hidden Nests in Sandwich
If a builder is due to work on a wall that has wasps in it, the nest should be treated first, because tradespeople and live colonies do not mix.
A job booked for the wrong wall
It often goes like this. A repointing job, a new coat of masonry paint or some wall work is booked for the summer. Then somebody notices wasps going into a gap. The builder arrives, and the colony does not take kindly to scaffolding, ladders and drills.
In Sandwich, in east Kent, as in any other area, the right order is simple: treat the nest, wait for the wall to go quiet and then do the work. Anything else puts tradespeople at risk and often leads to a delay and an argument about whose problem it is.
This article is for anyone who has work planned and a nest in the way.
A related situation arises with insulation work. Gaps in a wall that are being filled or treated can hold a nest, and the builder may not notice until the work has begun. Walk the wall with them beforehand, and point out any activity.
Roofers and gutter cleaners are another group at risk. A ladder resting against a wall with an entrance, or a hose pointed at the eaves, will disturb a nest above and around it. If any trade is due to work at height, check the walls for activity first.
Why trades and nests are a bad mix
Building work is noisy and involves vibration, ladders and scaffolding. All of that disturbs a nest. A tradesperson at height next to an active entrance has little room to retreat, and the stings can come from many directions at once.
Common problems include:
- A builder abandoning a job on the day after being stung
- Scaffolding erected within reach of the flight path
- Gaps being filled with wasps still inside
- Work disturbing the cavity and releasing the colony into the building
- Delays and extra costs while the problem is dealt with
Tell any contractor about the nest as soon as you know of it. Most will appreciate the warning and will postpone the work for a few days.
Painters and window cleaners are as vulnerable as builders. Anyone with a ladder, a hose or a roller near an entrance is at risk, so tell them too.
The right order of work
A sensible sequence avoids trouble.
- Spot the nest and note the wall and entrance.
- Book a treatment and tell your builder the date.
- Wait until the wasps have gone and the wall has been quiet for several days.
- Have the builder carry out the repair or other work.
- Make sure the entrance is sealed as part of the job.
If the builder is already on site, stop work on that wall and keep everyone away from it. Do not carry on and hope. If someone is stung, wash the area, remove the sting if visible and use a cold pack, and call 999 for swelling of the face, lips or throat, breathing difficulty, dizziness or a widespread rash.
If you have to push a start date back, most tradespeople would rather do that than risk a sting. A short delay is usually a minor inconvenience.
What to tell the technician
When you book, mention that building work is planned. This helps us understand the timing, and it lets you ask for a visit before the builder arrives. Evening and weekend appointments are available, and same-day service is offered, which can help if a start date is close.
Describe the wall, the height and the opening. If scaffolding is up, say where it is. If anyone on site is allergic to stings, tell us at booking so it can be prioritised.
The technician treats the nest through the entry point, so the wall is not opened. You can ask whether the empty nest can be taken down, which may matter if the wall is about to be worked on.
Include details about the work. If it is the same wall that has the entrance, we can plan the treatment accordingly.
Price and practicalities
The charge for treating a nest is a flat £120 per nest, with a guaranteed single visit and no call-out charge. It does not change for evenings or weekends. Should another nest be found, it is £60 more. These are the same for domestic and commercial work.
The cost of the treatment is separate from the cost of the building work. If you are unsure who should pay, such as when the work is for a landlord or a customer, check your contract or agreement, as it depends on the terms.
Allow a few days between treatment and building work, so that you can be confident that the wall is quiet.
If you are managing the job on behalf of a client or landlord, put the wasp treatment in writing along with the dates. That way everyone knows what has been done, and the builder has a clear starting point. A short note is enough.
Making the wall wasp-proof
Once the nest is gone, the building work is an ideal chance to close the entrance properly. Ask the builder to fill gaps, repoint loose joints and fit mesh to vents. Do it as part of the job, rather than as an afterthought.
Ask them to look at the rest of the building too. A wall that has hosted one nest may have other weak spots.
Ring 01622 410 019 when you are ready, or use the contact page form if you prefer to write. The technician is fully insured and qualified, and we work seven days a week.
Ask your builder to leave the entrance until last, so that it is the final job and nothing else is in the way.
A wall that is both sealed and repainted tends to stay tidy for years. If you are already paying for access equipment or a tradesperson's time, adding the gap to the list costs little extra and removes a likely nesting spot before next spring.
Wasps on your property in Sandwich?
Fixed price £120 per nest, no call-out charge, same-day service available.