German Cockroaches Where a Kitchen Stays Hot
The small light-brown species with two dark stripes behind its head lives indoors all year and never needs to go outside. What keeps it going is an appliance that holds its heat: a fridge motor, a dishwasher that runs at midnight, a boiler in a cupboard, an oven cooling slowly after service. Every one of those has a warm cavity beside it, which is where the insects spend daylight, and it makes no difference whether the kitchen belongs to a restaurant, the flat over it or a household whose side-return extension is now the warmest room in a large house.
Daylight tells you very little, and a torch late at night tells you most of what there is to know. Open the cupboard beside the cooker, look at the gap under the plinths on the run nearest the boiler, and pull the fridge out if you can move it. There is a guide to the hiding places in a kitchen, and another on the signs to look for - droppings like coarse pepper, small brown egg cases tucked into corners, a stale smell in a cupboard.
Flats Above the Shops, and the Houses Immediately Behind
A parade is one structure, not a row of separate buildings. The flats reached by a door between two shopfronts share a roof void, party walls and boxed-in pipe and extraction runs with every unit along it, and the first houses in the side streets have rear walls, yards and bin standings close up against the back of it. So the flat that gets them is not always the one directly over the kitchen. How cockroaches spread between flats describes that movement, and how they get into properties covers what arrives in crates, cardboard and second-hand appliances carried up a stair.
Oriental Cockroaches at Garden Level
The other species runs to two and a half centimetres, is almost black, moves slowly and climbs smooth surfaces poorly, so it tends to stay at the bottom of a building. In these houses the bottom means a lot: a kitchen at garden level, a lightwell with a gully at the foot of the front steps, the old vault or coal hole under the front path, and brickwork that holds damp against the earth on one side. Telling the two apart is worth doing early, because it decides where you look. Drains are a subject in their own right and the Kensal Green page deals with them.
What to Do Before the Visit
- Which direction they bolt in is worth more to us than how many you counted, so watch one and tell us
- Unclip the kickboard on the run beside the boiler if it comes away, and shine a torch into the void
- Clear out whatever is stored in the cupboards that will need opening, including the one the boiler stands in
- A wet cupboard floor or a slow leak under a bath keeps them going long after the food is locked away
- Do not stack cardboard, crates or bags in the lightwell, the vault or a garden studio - put them out
- Buy nothing from a shop shelf: a spray moves them into wall voids and next door and leaves the egg cases
An orderly procession of small insects on a worktop is a different animal altogether: that is what ant control in Queen’s Park is for.
Booking, and What Happens Afterwards
Useful things to say when you book: the type of address, the floor the sightings are on, and whether anybody else in the building has mentioned them. Afterwards, an insect or two in the days that follow is part of the normal pattern rather than a sign of failure, since eggs go on hatching and disturbed insects move about more - the guide to sightings after treatment explains it. The building and the size of the problem set the pace. Ring us again if they are still around beyond the period we give you.
Cafés, Restaurants and Takeaways: Quoted Per Site
A kitchen that trades is quoted on its own terms, not at a domestic price, because its size, storage, yard, deliveries and hours all bear on the job. Call and describe the site, and say whether there are homes above or behind it. The law requires a food business to keep pests out of areas where food is prepared and stored, which is reason enough to act on one insect rather than wait for a second.
Closing the Way Back In
With the insects dealt with, the openings they were using are the next job: the hole a waste pipe leaves under a sink, the space a boiler flue passes through, the void behind a kickboard, and the point where a service pipe crosses a wall at garden level. Rodents take the same shortcuts, so mouse control in Queen’s Park is worth a look if something is also moving overhead after dark. Prevention is covered in full in its own guide, and Cockroach Control Brent covers the service across the borough.
