Wasp Nests Under Roof Tiles – A Common Problem for Chalk Homes
A nest found in May is far smaller than one in August, but it is the same colony and it is easier to handle. Early action is the calmest route.
The quiet start of the wasp year
A wasp that has come through the winter looks for a site as soon as the weather warms up, usually from late April, depending on how the spring behaves. It picks a sheltered spot, such as a gap in the eaves or beneath a roof tile, and builds the first cells on its own.
For several weeks the colony is tiny. A single wasp lays eggs, feeds the grubs and goes out foraging alone. Only when the first workers hatch can it stay put, and the nest begins to grow in earnest.
It means that in Chalk, as anywhere, a spring sighting is the colony in its earliest and most manageable form.
The weather matters at this stage. A cold snap in late April can delay the whole business, so the first signs may come in May or even June in some years. The timing varies, but the pattern does not.
What you might see in May
At this stage the signs are modest, and many people miss them or put them down to a stray insect. Be alert for the pattern rather than a single wasp, because the pattern is what separates a nest from a visitor.
- One or two wasps going repeatedly to the same corner of the roof, and not leaving by a different route.
- A wasp hovering at a gap at the edge of the tiles, then slipping inside.
- A single, rather large wasp seen on a warm morning, exploring the same corner of the house.
- A very faint papery sound if you stand close to a wall on a quiet day.
A single wasp indoors in spring is not necessarily a nest. A wasp coming out of a winter hiding place sometimes wanders into rooms. If it keeps returning to the same part of the roof, though, a nest may be starting.
Another clue is where the wasps come from. In spring the colony starts from one wasp, so you tend to see a single insect making repeated trips. When the first workers appear, there are suddenly several of them moving in and out of the same gap.
Why waiting for it to get bigger helps nobody
Some householders think it makes sense to wait and see, in the hope that the wasps will move on. They seldom do. A wasp that has chosen a site stays with it, and the colony only expands, and by midsummer you are dealing with hundreds of wasps where there were once a handful.
The reassuring thing about a young nest is that it can be treated promptly and without drama. You are not facing thousands of wasps, and the household has had little time to be disturbed by the colony.
None of that makes it a job for you. A young nest still has wasps who will defend it, and the usual rule remains: keep your distance and let a technician do the work.
There is also the matter of the roof timbers. Over a few weeks the colony may extend its nest into the surrounding space, and a nest that began the size of a walnut can be the size of a grapefruit before the end of June.
Leave the entry open and the ladder alone
The urge to act is strongest when the nest is small, because it feels harmless. Do not go up to look at it, and do not push anything into the gap. A ladder placed against the gutter near an entry, and a hand stretched out towards the tiles, is how a minor problem turns into a major one.
Sealing the gap with foam or mortar might feel safe at this stage, but the wasps are inside, and the colony will find another way out. It is easy to end up with a wasp in the loft or a bedroom.
Better to do nothing to the roof at all, keep clear of the area, and ring for a treatment. Once the nest is gone, repair the gap properly so a later colony does not move in.
If you are planning any roof work, such as repointing or replacing tiles, this is also the time to mention it. The wasps should be dealt with before the builders arrive.
A small-nest checklist for the household
There are a few quick things worth doing on the day you notice the problem:
- Note the position of the entry from a distance and take a photograph.
- Keep windows closed on that side of the building during the day.
- Tell the family not to stand or sit directly beneath the entry.
- Check the other sides of the roofline for similar gaps.
- Call to arrange a treatment, and mention any allergy to stings.
Stung? Wash the spot, remove the sting if you can see it, and cool it with a cold pack. Swelling of the face, lips or throat, a wheeze, difficulty breathing, dizziness or a spreading rash mean you should call 999.
Cost, booking and afterwards
One nest is priced at a fixed £120 per nest, with nothing added for the visit itself. If a second nest is found at the property, it is charged at £60 extra. The price does not rise because a nest is old or young, and it is the same at any hour. The price graphic is clear that you receive one visit guaranteed.
The office is open seven days a week and can offer same-day service. Evening and weekend appointments are available. Ring 01622 410 019 or fill in the booking form on the contact page; the form also serves for urgent cases outside normal hours. The person who attends is insured and qualified, and the service is open to homes and businesses.
Once the nest has been dealt with, you may notice a few wasps checking the old spot for a short time. Ask the technician if the small empty nest can come down. In the autumn, ask a roofer to look at the gap, so that next April's nest-builders find it closed.
Booking early in the year also leaves you free to enjoy the garden through the summer, rather than watching a nest swell above the patio.
Wasps on your property in Chalk?
Fixed price £120 per nest, no call-out charge, same-day service available.