
The original tiled path running from the gate to the front door is one of the nicest things about these houses and one of the best pieces of ant habitat in the street. The tiles sit on a bed of sand and lime that has been settling for a century, the joints have opened here and there, and the whole thing holds the afternoon heat long after the sun has gone round.
If a trail keeps reappearing in the same corner however often you wipe it away, book ant control: £190 for a flat, £220 for a house. Call 0800 955 2347.

Black garden ants want ground they can tunnel through that drains freely and warms up quickly, and they are not fussy about how old it is. The sand bed beneath an encaustic path, the loose material under a low front wall, the strip of dry earth between the path edge and the bay, and the crumbling mortar at the base of the steps all qualify. A colony can hold the same position for years, which is why the trail arrives at the same door every summer instead of wandering. Fine granular soil pushed up in small heaps between tiles or slabs in June is the giveaway. Where ants nest around houses has the wider list, and how to find an ant nest shows what to watch for without lifting anything.

Ants almost never come in at head height. Look at the worn stone or tiled doorstep, the gap under a front door that has dropped a little, the hole where a waste pipe or a boiler condensate pipe leaves the wall, an air brick at floor level and the joint where the path butts up against the brickwork. Follow the line indoors to the point it vanishes into a skirting, then go out and look at exactly that spot from the other side; the answer is usually within a foot of it. Why ants keep coming into the kitchen explains what draws them the last few feet.
The back of these houses is a small yard or garden with brick walls on three sides and often an alley beyond, and the same materials repeat there: paving on sand, a path down one side, bare earth at the foot of a wall, a step down from the back addition. Old brick walls are ideal, because soft mortar joints give a colony a dry, sheltered run right up to the level of the ground floor. A trail that climbs a rear wall and stops at a first-floor window is not lost — it is heading for a kitchen that happens to be upstairs. Where the yard is shared between flats, note where the ants surface rather than lifting paving yourself, and mention it when you call.

When a terrace is divided up, the kitchens usually end up in what were back rooms or in the back addition, with pipework and cables boxed in behind the units and a good deal of warmth trapped in a small space. A ground-floor kitchen there is a few feet from soil on two sides. Crumbs behind an appliance, a wet cloth left overnight and a bin under the sink finish the job. Ants in a kitchen on an upper floor are worth a closer look, because they may be following a warm pipe run inside the building rather than walking in at a door; can ants nest inside walls? covers when that happens and when it does not.
Ants barely two millimetres long, pale yellowish and faint enough to be mistaken for moving dust, are a different insect with different habits. Pharaoh ants nest inside heated buildings near hot pipes and behind units, pay no attention to the seasons and run several queens at once, so an aerosol that kills the workers on a worktop can prompt the colony to split and set up in new places. Put shop-bought products away, leave the trail where it is so it can be followed, and read Pharaoh ants vs garden ants before doing anything. Ask the flats above and below whether they have seen the same thing, since one colony can feed trails into several. Small brown insects that scatter from behind the kickboard when the light goes on are more likely cockroaches than ants.
On a few close, humid afternoons in July or August, every colony in a street sends winged queens and males up together, and a front garden laid mostly to tile and paving can look as though it is steaming. Outdoors it is over in a day or so and needs nothing but a closed front door, and it does at least tell you precisely which joint the nest is under. Winged ants coming up inside the house — through a gap in the floorboards, from behind a skirting or around a hearth — mean the nest is under the building rather than out by the path, and that is worth saying when you book. Why flying ants suddenly appear indoors explains the flight itself. Insects using one fixed opening on the roofline steadily for weeks are not ants but a wasp nest.
Ants can still be about for a while after a visit, and how long that lasts depends on the species and how far the colony runs under the path or the yard; how long ant treatment takes goes into what affects it. If the trail is as heavy a while later, ring back and describe where it runs now. When an ant problem needs treatment is useful if you are still weighing up whether to book at all.
Once the colony has been dealt with, everything useful happens at ground level around the doors and the path. How to stop ants entering your home covers more of it, why ants come back after DIY treatment explains the usual disappointment, and Ant Control Brent covers the rest of the borough, including neighbouring Harlesden.
Ant control in Kensal Green is £190 for a flat and £220 for a house. A whole terraced house in single occupation is priced as a house; a converted flat, a garden flat and a flat over the shops on Chamberlayne Road or Harrow Road are each priced as a flat, whichever floor they are on and whether or not the front garden goes with them. The price is for dealing with the ant problem at your address, and we talk through what the visit involves before you confirm anything.
| Treatment | Price |
|---|---|
| Ant Control – Flat | £190 |
| Ant Control – House | £220 |
Almost never. A colony spreads further than any one tile, the path is worth keeping, and taking it up tends to move the ants along rather than remove them. Watch which joint they disappear into, note it, and tell us when you book.
Garden ants climb without difficulty, and an old brick wall with soft mortar joints, a downpipe or a boxed-in pipe run gives them a sheltered route up the back of the house. Trace the trail to the point it leaves the room. Ant control for a flat is £190.
Better not. Treating ground that other households use is not a resident's job, and powder washes away at the first rain. Note where the ants come up out of the paving, then book ant control for your own kitchen and say what you saw.
It suggests a nest beneath the floor or against the foundations rather than out in the front garden. Vacuum them up, keep that room shut for the afternoon and tell us when you book, because it changes where we start looking.
Probably not. Very small, pale ants indoors in winter fit Pharaoh ants, which live inside warm buildings rather than in the ground. Do not spray them, as that can split the colony into several, and say how small they are when you ring.
A surface product usually reaches the foragers and not the nest, so the colony simply sends more along the same scent trail. Our Brent ant advice goes through dealing with the source instead of the symptom.
It can explain a lot. Ants take no notice of a party wall, and the front paths of a terrace run as one continuous strip of warm, sandy ground, so a single colony can feed trails into two or three houses. It is worth comparing notes with the neighbours.
They are a nuisance rather than a structural problem: they do not eat timber and they are not hollowing out the wall. A trail running over food surfaces is still worth stopping, and one that returns every few weeks means the colony is settled very close by.





















Tell us whether it is a house or a flat, which floor the kitchen is on, where the trail crosses into the room, what size and colour the ants are, and your NW10 postcode. Borough-wide prices are on Ant Control Brent.
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