Wasp Nests Under Roof Tiles – A Common Problem for Charlton Homes
A nest beneath the tiles is usually invisible, but the wasps give it away. Here is how to read their flight path from the ground and what to do next.
A nest you cannot see
Most people who find a wasp nest at roof level never actually see the nest. What they see is traffic: a thin, steady line of wasps heading to and from one small spot beneath the tiles, the eaves or the fascia board. The nest itself is a papery structure tucked into a cavity, and the only part of it that shows to the outside world is the entrance.
That is why a nest under the tiles can go unnoticed for weeks in spring. A new colony starts small, founded in early April or thereabouts, depending on how mild the weather has been. It grows quietly through the early summer and peaks in August, by which point there can be as many as 2,000 wasps coming and going. The same gap that was barely noticeable in May becomes a busy doorway by high summer.
If you are reading this in Charlton because you have spotted wasps disappearing into the roofline, the practical question is not how to get rid of them yourself. It is how to gather enough useful detail from the ground so that a technician can plan the visit properly.
Reading the flight path safely
You can learn a great deal without going anywhere near the roof. Choose a spot well back from the building, ideally on the far side of the garden or across the road, and watch for a few minutes on a warm, dry day. Wasps keep to a route, so you will see the same line repeated over and over.
- Where the line ends. Note the exact point where wasps vanish: a gap between two tiles, the corner of the eaves, a join in the soffit or behind the fascia.
- Which side of the house. Say whether it faces the front, the back or a side wall, and roughly how high up it is.
- How busy it is. A few wasps now and then is different from a constant stream. Describe it in your own words, because this helps with planning.
- Time of day. Traffic tends to be heaviest when it is warm, and it slows towards dusk.
If you have a phone with a decent zoom, a short photo or video taken from a distance is useful. Stay back while you take it. There is no need to get closer than the width of a garden.
What not to do while you are watching
It is tempting to walk right up for a better look. Do not. A nest that is disturbed can send out a defensive swarm, and wasps that feel threatened will sting more than once. Keep clear of the area directly beneath the entrance, since wasps fly out and down from it.
Avoid banging on walls or ceilings, shining a torch into the gap or blocking the line of flight with a ladder, a washing line or a garden chair. Keep children and pets away from that side of the property, and think about whether a door or window close to the entrance should stay shut for now.
It also helps to hold back on garden jobs nearby. Mowing, strimming or hedge-cutting beneath the entrance creates vibration and noise, which wasps can read as a threat. Postpone anything of that kind until the nest has been dealt with.
Do not try to follow a wasp across the garden with a spray or a rolled-up newspaper. Swatting individual workers achieves nothing, as the nest produces more, and an agitated wasp is more likely to sting.
Why this is not a ladder job
Roof-level work is where most DIY attempts go wrong. You would be standing on a ladder, probably leaning slightly to one side, reaching up towards a spot that wasps are actively defending. If they come out, you cannot step back, cannot cover your face quickly and cannot hold the ladder steady at the same time. A fall from height is a far more serious injury than a sting.
There is also the matter of the nest itself. Tiles, battens and the edges of the eaves can hide the true position of the cavity, so even someone who reaches the entrance may be treating the wrong spot. A technician works with the right access and the right protection, and has the training to judge where the nest actually sits.
For the same reason, resist the urge to fill or seal the gap while wasps are still using it. Trapped wasps tend to look for another way out, and that can be through a ceiling or a light fitting into the house. Leave the entrance open until the nest has been treated.
Booking the visit
Wasp Exterminator Hertfordshire treats nests under roof tiles for a fixed £70 per nest, with £30 for each additional nest on the same property. There is no call-out charge. The price is confirmed on the phone before anyone attends, and nothing goes ahead until you have agreed to it.
The one exception is difficult access. If the nest can only be reached with special equipment, the price might be more, and you will be told before any work starts. This is why your notes on the height and position of the entrance are worth having ready.
You can ring 07852 111 437, or use the online booking form or the contact page. The technician covering your part of the county is alerted by SMS and email, seven days a week. Same-day visits, evenings and weekend appointments are all offered. If anyone in your household is allergic to wasp stings, say so when you book so that the booking can be prioritised.
Once the nest is treated, wasp activity at the entrance should fall away over the following days. Ask the technician at booking whether the empty nest can be taken down, and leave any repair of the gap until you have been told it is safe.
Wasps on your property in Charlton?
Fixed price £70 per nest, no call-out charge, same-day service available.