Wasp Nests in Lofts, Sheds and Walls: Where They Hide

Most people picture a wasp nest as a football-sized ball hanging from a branch. In reality, many are tucked away where you cannot see them: in a roof space, behind a shed wall, in a cavity or inside an old air brick.

The first sign is often the wasps themselves. Knowing where to look, from a safe distance, helps you understand what you are dealing with.

Why wasps pick enclosed spaces

A queen looks for a dry, sheltered, undisturbed spot in spring. Lofts, sheds, garages, wall cavities and gaps under roof tiles tick every box. Once she starts building, the colony grows through summer.

A small start in spring can become a large nest by late summer, which is why the problem often seems to appear suddenly.

Mild springs and warm summers help colonies get established, and a nest in a well-insulated loft can be warm enough to keep growing well into the autumn.

Lofts and roof spaces

Wasps can enter through gaps at the eaves, loose tiles, soffits and fascia, or ventilation points. Inside, they attach nests to rafters or insulation, and the paper nest can grow quite large.

Signs include wasps entering a single gap near the roof edge, a rustling or scratching sound from the ceiling and wasps emerging from a light fitting or loft hatch.

A damp ceiling stain or a patch of fine, chewed fibre on the floor of the loft may indicate a nest above, but only a trained eye can tell what is causing it. Do not climb up to look.

• A steady stream of wasps at the same gap in the roofline
• Buzzing or rasping noises from the ceiling
• Brown stains or papery debris on a ceiling
• Wasps appearing indoors near the loft hatch

Sheds, garages and outbuildings

Sheds are popular because they are quiet and seldom visited. Nests can hang from the roof, sit behind stored items or hide in gaps between boards.

Do not go in to check. If you hear buzzing or see wasps going in and out of a gap, leave the door shut and keep people and pets away until it has been looked at.

Keep ladders, bikes and tools out of the way of the shed door, and avoid strimming or hammering nearby. Vibrations carry through the timber and agitate the colony.

Walls, airbricks and cavities

Wasps use small gaps in brickwork, vents and airbricks to enter cavity walls. The nest may be out of sight, yet you will see wasps constantly arriving and leaving.

Never block the hole. Trapped wasps will look for another way out, and that might be into your living space. Blocking also tends to make them more agitated.

If wasps start appearing inside the house through a light fitting, a ventilation grille or gaps around pipes, there may be a route in from a cavity. Close the door to that room and let a professional take a look.

What to do when you suspect a hidden nest

Watch from a distance and note where the wasps go in and out, plus roughly how busy the traffic is. Keep windows near the entrance closed and warn the household.

Essex Pest Solutions treats wasp nests in roof spaces, outbuildings and walls. Access, height and construction all affect how the job is done, so a technician will assess it first. Nests found in winter are usually dead and are not reused.

Once a nest has been treated, sealing the gap and repairing any damaged soffit or brickwork can help stop another queen from moving in next spring.

Frequently asked questions