Wasps Around Your Guttering and Fascias? How to Find the Nest in Althorne

When wasps turn up inside the house but a nest is not visible outside, the cause is often a gap at the soffit that opens into the roof space.

The soffit is the underside of the eaves

The soffit is the board running along the underside of the overhang, between the wall and the edge of the roof. In many homes it contains small vents to let air into the loft, and it is joined to the fascia at its outer edge. That makes it a long, narrow, sheltered space with a handy ceiling above it, which is why wasps like it.

A nest behind or above a soffit is often not visible at all. What you notice are the signs of traffic at the eaves, and sometimes wasps appearing indoors, on the ceiling light, at a bedroom window or by the loft hatch. If you are seeing wasps inside the house on warm days and the pattern repeats, a roofline entrance is a good suspect.

Wasps start building from late April depending on the weather, so a hidden nest can be growing for weeks before anyone notices.

Reading the outside of the eaves

Walk around the house and look upwards at the underside of the overhang from a few metres out. You are checking for places where the soffit board has lifted from the wall, where a corner has cracked, where a vent cover is missing or where a hole has formed at the junction with the fascia. Plastic soffits can warp in the sun and timber ones can soften. Either leaves openings of exactly the size a wasp needs.

Choose a sunny, dry moment and watch the length of the eaves for ten minutes. Wasps going into the same small area again and again are using it as their entrance. Mark the spot in your head by reference to a window, a downpipe or a corner, and keep your distance.

Remember that vent slots are meant to be open. A wasp resting near a vent is not necessarily a sign of a nest, but a stream of wasps is.

Clues from inside the house

Indoors, the signs are different. You may hear a faint scratching or buzzing from the ceiling, particularly on a warm afternoon. You may see wasps on the glass of a window or crawling along the ceiling near the loft hatch. In some cases a discoloured patch appears on the plasterboard, which may indicate that something is happening behind it, although stains also have many other causes.

If you notice any of these, avoid the temptation to open the loft and look. A nest that connects with the roof space may be only metres from the hatch, and opening it releases a rush of warm air and vibration into the colony. Keep the hatch closed, keep the room's door shut if wasps are coming in and report what you see.

• Wasps repeatedly found in the same room.
• A buzzing sound from above the ceiling.
• Wasps appearing in the evening around lights.
• Stains or a damp smell around the loft hatch.

Why you should not seal the gap yourself

Blocking an entrance while a nest is active can send wasps hunting for another way out, and the ceiling is often the nearest alternative. People then find a dozen wasps in a bedroom within hours. Please resist the urge to stuff a rag into a hole or fill it with expanding foam.

For the same reason, do not shut a loft hatch and leave the household's sleeping area directly underneath a mature nest without telling anyone. Let us know about it when you call, so the visit can be planned around the layout of the house.

If a sting happens indoors, wash the area, remove the sting if you can see it and use a cold pack. Swelling of the face, lips or throat, wheezing or difficulty breathing, dizziness or a widespread rash means calling 999. People with known allergies should speak to their GP, and should be mentioned when booking.

What the technician will do

A technician will want to know where in the house you have seen wasps and where you have seen them outside, then work out the line between the two. They carry suitable access equipment and protective clothing, and they treat the nest at its source, which may be reached from outside the eaves rather than from the loft. After treatment you may still see a few wasps over the following days as returning workers find the entrance quiet.

If you want to know whether the empty nest can be taken down, ask when you book. Where it is possible depends on where the nest sits, and the technician will tell you honestly.

Before the visit, make sure the technician can get to the wall outside the affected room, move any cars or bins from underneath and keep pets indoors. If the entrance seems to be above a bedroom, let the technician know which room it is, because that helps them follow the wasps’ line from inside to out. Afterwards you may find a few dead wasps on window sills or the floor, which can simply be swept up.

Keeping wasps out of the rooms meanwhile

While you wait for the visit, use a few practical measures. Close the door of any room where wasps are appearing and put a rolled towel at the bottom of the door. Keep the windows shut in the daytime, or fit a fine mesh. Switch off lights near the ceiling in the evening if wasps are gathering at them, and draw the curtains so they are not drawn to the glass.

If a wasp lands in the room, open a window on the side away from you and let it leave, rather than swatting. Wasps are not usually aggressive when not defending the nest, though they may sting if pinned, trapped in clothing or crushed. Check shoes and towels on the floor before using them.

Once the colony has been treated, the opening should be repaired. Ask a builder or carpenter to replace lifted soffit panels, refit missing vent covers with a fine mesh that still lets air through, and seal any cracks at the corner with the right filler. The loft needs ventilation, so the repair should keep the vents but make them wasp-proof.

Our nest treatment costs a fixed £90 per nest, with one visit guaranteed, and an additional nest on the same property is £35 more. We cover Althorne and the surrounding villages seven days a week and can offer same-day visits, for homes and commercial buildings alike, fully insured. Ring 01245 327274 or use the booking form on the contact page to arrange it.

Frequently asked questions

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