Wasp Nests Under Roof Tiles – A Common Problem for Queniborough Homes
A roof nest follows a predictable calendar, from one queen in late April to a colony of thousands by August, and knowing it shows when to look and when to act.
One queen, late April
Every roof nest begins with a single wasp. After winter, a mated queen emerges, usually from late April though the date shifts with how mild the spring has been. She is on her own and she needs somewhere to start. She goes looking for a sheltered cavity, and gaps under tiles, in eaves and behind fascias suit her perfectly.
You are unlikely to notice her. She works alone, building a small papery starter nest and rearing the first few workers. At this stage there is nothing to see except, perhaps, one wasp going into the same crack on several occasions. Most households miss it, understandably.
May and June, a quiet build-up
Once the first workers hatch, they take over foraging and building, and the queen stays inside to lay. The nest begins to expand. In May and June the activity at the entrance is light. Two or three wasps in and out over a few minutes is typical.
This is the best time to deal with a nest, in the sense that it is smallest, but it is also the time it is hardest to spot. If you live in Queniborough or anywhere else and see wasps repeatedly using one gap in the roofline in early summer, it is worth taking seriously, even if the numbers are low.
- Look along the eaves and fascia once a week when you are in the garden.
- Note any gap where wasps appear to go in and not come back out at once.
- Watch from a safe distance rather than trying to look inside.
July, when it becomes obvious
By July the colony has grown a good deal, and the entrance is busier. This is when most people notice. A steady two-way stream of wasps is hard to ignore, and the sound from inside the roof may start to carry.
Wasps are also now looking for food in larger numbers, which is why gardens, bins and barbecues suddenly seem full of them. The nest is not necessarily nearby, but the traffic to it has become heavy. If the flight path leads towards your roof, the nest is probably in it.
This is a perfectly good time to book. The colony is large enough to be a risk, but nothing about the treatment is different from earlier in the season.
August, the peak
August is when a nest is at its largest, and it can hold anywhere from two thousand to ten thousand wasps or more. The nest may now be a considerable size inside the roof structure. Wasps are also more irritable at this stage, since the workers are older and the colony is defending a lot.
If you have not acted by now, do not wait for autumn on the assumption it will sort itself out. A nest does not disappear in September. Treating it in August is no less effective than in June, although fewer people want to be near the roof, which is a good reason to leave it to a professional.
Reading the calendar for your own roof
The calendar above is a general pattern rather than a rule. Wasps follow the weather, so a mild spring can bring the first queens out earlier and a cold one can hold them back. A warm summer lets a colony grow faster. That is why we avoid giving dates for when a nest will appear on your house, and why the best approach is to watch rather than assume.
A sensible routine is to take five minutes each week from late April, in the garden or on the way to the car, and glance along the eaves, the fascia and the lines where the tiles meet the wall. You are not inspecting anything. You are simply looking for the one place where wasps seem to go in and out repeatedly.
If you find such a spot early, note it down. If you are away for part of the summer, ask someone to keep an eye on it, because a nest left alone for six weeks can change from nothing to a very busy colony. Neighbours are often the first to spot it, since they can see your roof from an angle you cannot.
Finally, think about the season's other effects. Windows open on warm nights and doors propped for ventilation give wasps a way indoors, and a nest above the room doubles the chance of a visitor. Keeping insect screens in place helps while you arrange treatment.
If the nest turns out to be at roof level, remember that it is still a good idea to check outbuildings, the garage and any porch roof, since a queen that chose one gap may have chosen another elsewhere on the property.
What to do at any point in the season
The advice is the same whenever you notice it. Stay away from the nest, do not block the entrance, and do not use a ladder. Note where the wasps are entering and book a treatment.
We treat wasp nests at roof level for a fixed £95 and £35 covers an additional nest on the same property. There is no call-out charge. We confirm the price by phone before a visit and carry out no work without your agreement. Our technicians are trained and fully insured, we handle domestic and commercial jobs, and we work seven days a week with same-day service available.
Ring 0116 214 9259 or use the booking form at /contact-us/. Let us know if anyone is allergic to stings. Once the wasps are gone, ask about taking down the empty nest, and have the gap repaired by a roofer.
Wasps on your property in Queniborough?
Fixed price £95 per nest, no call-out charge, same-day service available.