Wasp Nests Under Roof Tiles – A Common Problem for Swillington Homes
A nest under the tiles that is a small worry in May can be a major one by August, and the way the season unfolds explains why early action matters.
The short answer: the nest keeps growing
Wasps nest under roof tiles because the space is sheltered, and from the moment the queen settles there, the nest only gets bigger. Nothing about a roof void makes it stop. A colony that starts as a handful of cells in late April, depending on the spring, is likely to be a very large presence by the end of the summer.
That growth is why the right time to deal with a nest is as soon as you notice it, rather than when it becomes impossible to ignore.
Spring: a queen and a few cells
In spring the nest is tiny, and the single queen builds the first cells and rears the first workers by herself. If you see one large wasp investigating gaps under the tiles at this time of year, that is often a queen looking for a site.
This is the quietest stage. The traffic is a single insect and there is little to see. Many people are unaware of the nest at all during this period. If you do spot a queen going into a gap, make a note of it, since it will help the technician later.
The risk of being stung rises through the season, and it does so for reasons that have nothing to do with how you behave. A larger colony has more defenders, so a small disturbance produces a bigger response. A nest in May might send out a handful of wasps if provoked; a nest in August can produce a great many.
This is also why a gap near a door, window or washing line is more of a hazard than one at the far end of the house. The more often you pass the nest, the more chances you give it to react.
Mid-season is a good time to look
If you have not checked your roofline this year, July is a sensible time to do so. Walk round the house on a warm, dry day, standing well back, and look at each elevation for a few minutes. It costs nothing, and finding a nest while it is still modest in size gives you more choice about when to deal with it.
As the first workers hatch, they take over the building and foraging, and the queen stays inside. Traffic at the entrance grows, and you may start to see wasps going back and forth every few seconds. This is a good moment to arrange a treatment, since the nest is still comparatively small.
The wasps are not usually aggressive away from the nest at this stage, but they are defensive close to it. Keep people clear of the wall and roofline.
August: the peak
By August the colony is at its largest, and a nest can contain between 2,000 and 10,000 wasps or more. The traffic at the entrance is constant, and wasps are everywhere around the house, drawn to food, drinks and bins.
Late in the season the colony’s workers have less to do and become more irritable around sugary food. People are stung at picnics and in gardens at this time of year, and a nest close to the house makes those encounters more likely. If there is a nest under your tiles, September is not a time to wait and hope.
- Keep drinks covered and bins closed.
- Avoid leaving fallen fruit beneath trees near the house.
- Bring pet food indoors.
- Keep seating away from the wall with the nest.
As the weather turns, the colony winds down and the old nest is abandoned. Wasps do not reuse the nest the following year, but the same gap may attract a new queen. This is why repairs are worth doing once the roof is free of wasps.
If you notice an old paper nest in the roof space in winter, there is no live colony, and a roofer can deal with it as part of repairs. Ask the technician at booking whether an empty nest can be taken down.
What to note for the technician
Whatever stage the nest is at, the information the technician needs is the same. A few clear details save time on the phone and on arrival.
- The date you first noticed the wasps, even roughly.
- The wall and approximate height of the entrance.
- How busy the traffic seems at different times of day.
- Any sounds or stains indoors.
- Whether anyone in the household has a known sting allergy.
You do not need a perfect picture. A few honest observations are plenty, and the technician will take it from there.
Wasps are attracted to sweet food, and they will use any food source that is easy to reach. A tidy garden and kitchen will not make a nest go away, but it will lower the chance of wasps lingering around the house and finding their way indoors. Wipe down outdoor tables, rinse cans and bottles before binning them and keep lids on bins.
Booking at any point in the season
Treatment costs a fixed £90 per nest, with an additional nest on the same property at £35, and there is no call-out charge. We are open seven days a week and offer same-day service for homes and businesses. Trained technicians carry out the work, and it is fully insured.
Ring 0113 347 0014, or use the contact page form. We confirm the price on the phone before a visit and carry out no work without your agreement. If the nest is high on the roof, say so when you book so that any special access equipment is agreed up front. If someone in your household is allergic to stings, tell us at the same time.
We cover Swillington and the surrounding area throughout the season.
Wasps on your property in Swillington?
Fixed price £90 per nest, no call-out charge, same-day service available.