Cockroach Infestation in London: How to Identify and Eliminate Them

Cockroaches in London

Two species dominate London: the German cockroach (Blattella germanica) — small, light brown, loves warm kitchens — and the Oriental cockroach (Blatta orientalis) — larger, darker, found in drains and basements. Both are nocturnal and extremely fast breeders.

Signs of a Cockroach Infestation

• Droppings — small, dark, cylindrical, resembling ground coffee or black pepper
• Egg cases (oothecae) — brown, purse-shaped capsules containing up to 40 eggs
• Musty smell — a distinctive oily, musty odour from cockroach pheromones
• Smear marks — brown irregular marks on surfaces near water sources
• Shed skins — cockroaches moult several times before reaching adulthood
• Live cockroaches — seeing them during the day indicates a severe infestation

Health Risks

Cockroaches are one of the most dangerous household pests:

• Spread Salmonella, E. coli, and Staphylococcus
• Trigger asthma and allergies — cockroach droppings and shed skins are a major allergen
• Contaminate food preparation surfaces
• Can cause food business closure by environmental health officers

Why Professional Treatment is Essential

Cockroaches are notoriously difficult to eliminate without professional help:

• They hide in inaccessible areas (behind appliances, inside wall cavities)
• They develop resistance to over-the-counter insecticides
• A single surviving pregnant female can restart the infestation
• Professional gel baits and insect growth regulators (IGR) are far more effective

Our Treatment Process

1. Thorough inspection to identify species and harborage areas
2. Application of professional-grade gel bait in targeted locations
3. Residual insecticide spray to wall/floor junctions and harbourages
4. IGR treatment to prevent egg development
5. Follow-up visit to assess results and re-treat if necessary

For food businesses, we provide full EHO-compliant documentation.

Call 07586 072087 or book online for same-day cockroach treatment across London.