Wasp Nests Under Roof Tiles – A Common Problem for Tovil Homes
The top of a roof, where the ridge tiles meet, has joints and gaps that wasps find easy to use. Here is how to recognise a ridge-line nest and what to do about it.
The ridge is the highest and warmest part of the roof
The ridge is the line along the very top of a pitched roof where two slopes meet. It is capped with ridge tiles, and under each one is a sheltered space that gets the most sun in the day. For a wasp looking in spring for somewhere dry and warm, it can look ideal.
The joints between ridge tiles, and the place where the ridge ends at a gable wall, are the most common ways in. Hip ridges, the slanting lines on a hipped roof, work in the same way.
Because it is so high, a nest here is easy to miss. You see wasps reach the top of the roof and vanish, and that is usually the whole of the evidence.
If you see a mass of wasps flying around a chimney stack, do not assume the nest is in the chimney itself; the roof beside it is just as likely.
What you will notice from the garden
A ridge nest does not tend to produce wasps indoors, since it is a long way from your ceilings. What it produces is traffic. Look up on a warm day and you may see wasps landing on the top edge of the roof, crawling in under a ridge tile, and a stream of them leaving again.
- A thin, steady line of wasps going in and out at one point along the ridge.
- Wasps landing on the tile surface before disappearing underneath.
- More wasps around the highest point of the roof than anywhere else on the building.
- Chewed grey fibres or tiny crumbs of mortar on a ledge below, if the wasps have been working the joint.
Looking up safely, and why you should not go up
Observe from well away from the house, using binoculars or your phone camera if you have one. Daylight is best, because the traffic is heaviest then, and a warm afternoon makes it easiest to follow. A short note on where along the ridge the wasps enter will save time on the day, particularly if there are chimney stacks or a neighbouring roof close by.
Climbing up is a bad idea at any height, and the ridge is the hardest place to reach. You would be standing on a slope with nothing to hold, close to a nest that can hold several thousand wasps in late summer. Tovil is full of ordinary homes where a roofer or a technician with the right equipment is the better person for this.
The wasps defend a nest against anything that shakes it, and tiles transmit vibration well. Tapping on the roof or knocking a tile loose is the quickest way to get a swarm out.
Leave the joints as they are for now
If you can see an open joint, you may be tempted to push mortar or sealant into it. Please wait. The wasps are inside, they are busy, and if you block the opening they will look for another route out. That is sometimes through the roof timbers and into the property.
The proper order is to treat the nest, wait until the activity has died off, and then have the ridge repaired. A roofer can rebed ridge tiles, which is the lasting fix, and doing it too early only hides the wasps instead of removing them.
If you rent your home or the building is managed for you, what happens next depends on the tenancy agreement or your policy, so it is worth checking that and telling whoever manages it.
Be wary of anyone who offers to cover the ridge with sealant as a quick fix while the wasps are still active. The workers that are away from the nest at the time will return to find the entrance shut and become agitated, hovering around the spot or searching for another entry. That makes the roof more dangerous to approach, not less.
What the visit involves and what it costs
The charge for a nest is a fixed £120 per nest, with a second nest on the same property at £60 more. There is no call-out charge and no extra for working at height or in the evening. One visit is guaranteed, as the price graphic says.
Wasp Exterminator Kent works seven days a week, and can often attend the same day. Evening and weekend slots exist. Call 01622 410 019 or use the booking form on the contact page, and say that the wasps are going in along the ridge.
Afterwards, expect some stragglers for a short while. They will drift around the old entry point before they stop. The technician can tell you whether the empty nest can come down, which is worth asking when you book.
Gable ends, chimneys and where the ridge finishes
Ridge nests are often at the ends of the ridge rather than in the middle. Where the ridge meets a gable wall, or runs up to a chimney stack, the mortar bedding and the junction between brick and tile tend to open up first. If wasps are heading for one of these places, say so when you book.
It is also worth looking at the other side of the roof if you can. Wasps may leave on the sunny slope but go in on the shaded one, and what looks like two nests can turn out to be a single entrance seen from two angles. A second nest on the same property is charged at £60 extra, but only the technician can confirm whether there really are two.
Take a few photographs from different positions, all from a safe distance, and keep them to show the technician. Clear pictures help them bring the right access equipment.
The key point about this kind of job is that the height does not alter the cost. A ridge nest is £120 for the treatment, exactly like a nest anywhere else on the property, so there is no reason to delay in the hope that it will go away. It will not; a colony only gets bigger until the late summer.
Wasps on your property in Tovil?
Fixed price £120 per nest, no call-out charge, same-day service available.