Wasp Nests Under Roof Tiles – A Common Problem for Whitkirk Homes
Wasps do not need a large hole to get under your tiles, and a slipped or cracked tile is often all it takes. Here is what to check and what to leave alone.
A small gap is enough
The short answer to why wasps nest under roof tiles is that tiles leave small openings, and wasps only need one. A queen can fit through a space of a finger’s width or less, and she is looking for a dry cavity in which to start her nest from late April, depending on how mild the spring has been.
A roof that has been through winter storms, frost and thaw is more likely to have a tile that has shifted a little, a cracked edge, or a crumbling bed of mortar under the ridge. None of this needs to look dramatic from the ground. A slight tilt in one tile can open the way in.
Light and shelter draw wasps to these places. The gap leads to a warm, dry hollow, and from there the colony can expand into the void under the tiles. By high summer it can hold thousands of wasps, so a small flaw at roof level can become a large problem.
What to check, and from where
You can learn a surprising amount without leaving the ground. Stand back and look along the roof slope rather than at a single tile. Binoculars, if you have a pair, help you stay at a safe distance.
- Any tile sitting at a slightly different angle to its neighbours.
- Dark or broken edges where a tile has chipped.
- Gaps along the ridge or at the point where the roof meets a wall.
- Moss or debris disturbed around a particular spot.
- Wasps going in and out of the same place, which matters more than any flaw you can see.
The last point is the one that decides it. A damaged tile with no insects around it is a repair job for a roofer. A damaged tile with a steady stream of wasps entering is a live nest.
Reading the signs in the loft and ceilings
Sometimes the first clue is indoors. A faint rustling or dry scratching in the ceiling on a warm afternoon can be wasps working inside a nest. A brown, damp-looking stain on the plasterwork may appear if the nest has grown against the ceiling board. Neither sign proves a nest on its own, but together with traffic at a tile gap, they paint a clear picture.
Do not go into the loft to investigate. A hatch opening a few feet from a nest is a good way to meet the colony at close range. Keep the hatch shut and ask the household to keep out of that space.
If a bedroom lies directly beneath the affected part of the roof, think about sleeping elsewhere for a night or two until the treatment is done, particularly if the activity is heavy.
Why you should not push the tile back or fill the gap
It is natural to want to close an opening as soon as you see wasps using it. Resist that. If the nest is active, sealing the entrance traps the colony inside, and wasps with nowhere to go will look for another way out. That can be through the ceiling and into your rooms.
Pressing a tile back into position, stuffing the gap or poking products into it from a distance all disturb the colony without solving anything. Wait until the nest has been dealt with, and only then sort out the roof.
Reaching a gap in the tiles means leaning out on a ladder at height, one hand perhaps occupied, with a defensive colony a short distance from your face. It is difficult to think of a worse set-up. Even a confident person could be knocked off balance by a sudden sting.
The technician who comes to you is trained for this work and has the means to reach the spot safely. If the gap is at a height that needs more than a standard ladder, tell us when you ring and the access arrangements can be agreed on the phone before anybody visits.
Questions to ask yourself before you ring
A short list of answers makes the phone call efficient, and it lets us agree the arrangements for your property before the technician comes.
- Which elevation of the house are the wasps using, front, back or side?
- How high is the opening, in storeys?
- Is there a garage, extension or porch roof that might offer a lower route to the spot?
- Does anyone at home have a wasp allergy?
- Are there other places where wasps seem to be gathering?
None of these needs a perfect answer. A best guess is enough, and the technician will confirm the details on arrival.
After the nest has been treated
Once the nest has been treated, the damaged tile can be put right. Ask the technician at the time of booking whether the empty nest can be taken down, since that may be of interest if there is any chance of it being left in the roof void. A roofer can then replace or refit the tile and close the gap so that no new queen finds it next spring.
Keep an eye on the area through the season. A repaired roof is much less attractive to a queen than one with an obvious way in.
Wasp treatment is a fixed £90 per nest, or £35 for an additional nest on the same property, with no call-out charge. The lines are open seven days a week, and same-day service is available. We do domestic and commercial work, the technicians who attend are trained, and their work is fully insured. The price is agreed on the phone before a visit, and we only go ahead when you say yes. In Whitkirk or the villages around it, ring 0113 347 0014 or use the form on the contact page. If anyone at home is allergic to stings, tell us at that point.
Wasps on your property in Whitkirk?
Fixed price £90 per nest, no call-out charge, same-day service available.