Trace it rather than wipe it away
Each worker that repeats the same trip to food and back adds to the scent trail, which is why a line only seems to get busier the longer it's left alone - the same pattern holds near Holloway, where dense terraced housing and larger ex-GLC estates along the Holloway Road corridor. Wipe the trail away and the ants simply lay a new one, following it instead shows you where the colony actually is, true near Canonbury too, where georgian squares and terraces close to the Regent's Canal.
Small rear gardens around Canonbury and Highbury
The terraced houses with small rear gardens around Canonbury and Highbury typically have a patio close to the back door, and the warm, dry ground under paving slabs there is exactly what an ant colony looks for. A nest doesn't have to sit right against the house - a crack in a path or the base of a garden wall a few metres away can still send a trail all the way indoors.
Flats without their own garden
In the many converted flats and estate blocks across Holloway and Finsbury Park with no private garden, a trail is more likely to be following a crack in a shared path or communal courtyard, or gaps around pipework entering the building, rather than anything under a private patio.
What to leave alone for now
- Spraying the trail, which kills the foragers you can see and leaves the colony intact
- Pouring boiling water into paving, which can damage mortar without reaching the queen
- Filling the entry gap before the nest is dealt with, which sends ants to a new gap instead
- Scattering powders along the trail, which can split a colony into several smaller ones
Closing the way in afterwards
With the colony gone, the last step is sealing the exact gaps the ants were exploiting, a threshold, a pipe hole, a mortar crack, and nothing more - the same pattern holds near Angel, where the busy junction and shopping streets. Keep weep holes and air bricks open, blocking them as well only creates a damp problem inside the wall, whether that's near Canonbury, where georgian squares and terraces close to the Regent's Canal, or elsewhere in the borough.
Booking ant control in Islington
Ant control in Islington runs £190 for a flat and £220 for a house, and because around Archway, where terraced streets and estates on the borough's northern edge, it helps to say roughly whereabouts in the garden the nest might be when you book ant control, with the rest on the Islington ant control page.
