Expert Guide on How to Get Rid of Cockroaches Yourself

In any home, cockroaches are among the most dreaded and unwelcome guests of all. They're famous for their resilience and their capacity to survive in the most adverse conditions – and they can pose real risks to health by spreading germs and triggering allergic reactions.

The good news is that, in many cases, you can control cockroaches yourself without calling expensive professional help. This guide sets out easy-to-follow steps to identify, prevent and remove cockroaches from your home. One thing to hold onto throughout: the mistake we see most often is relying on spraying alone – knocking down the roaches you can see while leaving the food, warmth, moisture and harbourage that caused the problem. Spraying is only ever part of the answer.

What Are Cockroaches?

Cockroaches are insects belonging to the order Blattodea. They're infamous for enduring some of the most difficult conditions. Typically brown or black, they have flat, oval-shaped bodies with very long, whip-like antennae. Cockroaches are incredibly fast and can hide in small, dark places.

There are over 4,000 species in the world, but only a few of these are found in the UK. The two most notable are the German cockroach (Blattella germanica) and the Oriental cockroach (Blatta orientalis). The German cockroach is light yellow/brown with two dark "go faster" stripes and is 10–15mm long. The Oriental cockroach is shiny black or brown and larger, at 20–25mm. In our experience, UK homes throw up both in roughly equal measure, so it's worth identifying which one you're dealing with.

Cockroach Behaviour

Cockroaches are nocturnal and prefer to stay hidden in dark, damp places during the day. They're opportunistic scavengers, feeding on a wide variety of organic matter including food scraps, decaying materials, and even paper or glue. They're omnivores, eating both meat and non-meat.

Cockroaches are highly adaptable. They can survive in almost any environment, but they thrive best in warm, humid areas close to food and water.

Cockroach Lifecycle

All cockroaches start in the egg stage: the female deposits an ootheca (a case of eggs) in a safe, dark place. After gestation, the nymphs hatch and grow through stages into adults. The process takes multiple months and involves the cockroach casting off its skin 5–6 times as it grows.

German cockroaches

German cockroach eggs come in an ootheca containing around 30 eggs. Adult females can produce around 5–7 oothecae in their lives, equivalent to 150–210 eggs. Gestation is around a month. Once hatched, the nymphs take around 6–12 weeks to become fully grown adults, and adults can live for up to 6 months.

German cockroaches are great climbers and prefer warmer areas, such as boiler rooms or machinery motors.

Oriental cockroaches

Oriental cockroach eggs come in an ootheca containing around 15 eggs. Adult females can produce around 8 oothecae in their lives, equivalent to about 120 eggs. Gestation is around two months, which can prolong treatment. Once hatched, the nymphs take around 12 months in optimal conditions to become fully grown adults, and adults live for between 1 and 6 months.

Oriental cockroaches are nocturnal and can withstand cooler temperatures. They're commonly found emerging from sewers, drains and other void areas in buildings.

Identifying Cockroach Infestations

Recognising a cockroach infestation as early as possible is key to effective control. Here are the main tell-tale signs:

Physical Sightings

The most obvious sign is spotting them. Cockroaches are most often seen scurrying across floors or walls at night with a jagged movement. During the day, they hide in dark, secluded areas such as cracks, crevices and behind appliances.

Droppings

Cockroach droppings resemble small, black or brown specks and are often found where they're active. They can easily be mistaken for dirt or coffee grounds, so inspect closely.

Egg Casings

Cockroaches lay their eggs in capsule-like cases called oothecae, often hidden in cracks or behind furniture. These casings are typically brown and can contain multiple eggs, leading to a rapid increase in population if not addressed.

Unpleasant Odour

A strong, musty odour can be another sign of an infestation. This smell comes from the pheromones cockroaches release, and it's particularly noticeable where there's a high concentration of them.

Preventing Cockroaches

Prevention is always the best strategy. Here are several effective methods we recommend:

Eliminate Food Sources

Cockroaches are drawn by food and water, so keep your home clean and free of food debris at all times. Store food in sealed containers, clean up spills immediately, and dispose of rubbish regularly in sealed bins.

Seal Entry Points

Regularly inspect your home for cracks and gaps, especially around doors, windows and walls. Once found, seal them to prevent cockroaches and other pests from entering. Weather stripping and caulk work well.

Reduce Moisture

Cockroaches are drawn to moisture, so fix any leaky pipes, dripping taps or other sources of water and damp. Keep kitchens and bathrooms well-ventilated and dry.

Natural DIY Cockroach Control

Natural methods are often preferred before chemical solutions are considered. They work best as part of a wider plan (hygiene + proofing + monitoring). On their own, they may not clear an established infestation – especially German cockroaches. Here are several non-chemical methods:

Diatomaceous Earth

Diatomaceous earth is a fine, food-grade powder made from fossilised algae. Some people apply it in thin layers in dry cracks and crevices where cockroaches travel, as a gentle, low-toxicity option. It works only while completely dry, so keep it out of damp areas and reapply if it's disturbed. You'll find it in our natural powder and cockroach powder ranges.

Boric Acid

Boric acid is a long-established cockroach treatment, but it needs to be used carefully. The safest way is in a ready-made bait or gel labelled for cockroaches, rather than as a loose powder. If you do use a powder, apply only a very light, precise amount deep into cracks, crevices and voids where cockroaches hide – never in open areas, on surfaces, or anywhere children or pets could reach it, as boric acid is harmful if swallowed. Always follow the product label.

Natural Repellents

Essential oils such as peppermint, eucalyptus and lavender are believed to repel cockroaches. Mix a few drops with water in a spray bottle and apply around entry points and common cockroach locations. Treat these as a supporting deterrent, not a standalone fix.

Ultrasonic Repellers (can help as a supporting measure)

Ultrasonic cockroach repellers can be useful as an extra layer in a wider cockroach plan – especially combined with deep cleaning, drying up water sources, sealing gaps and targeted baiting. For best results, place them in open areas (not behind sofas or under cupboards), keep them switched on continuously, and use them alongside monitoring traps so you can see whether activity is dropping.

Chemical Solutions for Cockroaches

If cleaning, proofing and monitoring haven't reduced activity after 1–2 weeks, you can consider targeted DIY products. Focus on baits and crack/crevice application at known travel routes (under sinks, behind appliances, wall/floor junctions). Avoid blanket spraying – always follow the label, ventilate well, and keep children and pets away until safe. And remember: sprays knock down what they touch but won't fix the conditions drawing cockroaches in, so pair any treatment with the hygiene, moisture and proofing steps above, or you'll be back to square one.

Sticky Traps

Cockroach traps use a strong, non-toxic adhesive to attract cockroaches and trap them as they cross. They're great for monitoring infestation levels and catching individual cockroaches, but they don't target the source. Cockroach traps are generally safe around people, children and pets.

Monitor where you're catching cockroaches and concentrate cleaning, proofing and bait-station placement there. If trap counts aren't clearly falling after a few weeks, expand checks to adjacent rooms (cockroaches often spread through wall voids and service gaps).

Insecticide Sprays and Powders

Insecticide sprays can kill cockroaches on contact, especially for visible activity. For best results, treat likely harbourages and travel routes (where the label allows), such as cracks and crevices, along skirting boards, around pipe entry points, under sinks, behind appliances, and around cupboard edges.

For light activity, some customers prefer to start with a pesticide-free insect control spray labelled for cockroaches. These are usually best for spot treatment and quick knockdown of visible roaches, but may not be enough on their own for established infestations.

For longer-lasting control, residual insecticide sprays (where labelled for cockroaches) can be applied to suitable hiding places and routes. Once dry, they leave an active deposit that keeps working for a period, helping control cockroaches that move through treated areas later.

Residual powders and dusts can also be useful in dry cracks, crevices and voids (where labelled), particularly in areas hard to reach with a spray. Apply powders lightly and precisely – avoid overapplying.

Insect growth regulator (IGR) products (where labelled for cockroaches) can be a useful part of a wider plan for recurring infestations. IGRs don't usually provide quick knockdown of adults; instead they target immature stages and disrupt the breeding cycle over time, which can reduce re-infestation when combined with other controls.

For best results, combine insecticides with good sanitation, decluttering, moisture control, and cockroach baits/gels or traps where appropriate. Always follow the manufacturer's instructions exactly, and keep products away from children, pets and food-preparation areas.

Bait Stations

Cockroach bait stations are an effective way to control populations. The baits are designed to attract cockroaches, which eat the bait and return to their hiding spots, where they die. The bait can also kill other hidden cockroaches through secondary transmission. Place bait stations where cockroaches are most active, such as under sinks and behind appliances, but out of reach of children and pets.

Cleaning and Repairing After Cockroach Infestations

Don't forget good hygiene once you've tackled an infestation. Thoroughly clean and repair all areas where cockroaches have been active:

Clean Surfaces

Wipe down all surfaces with a disinfectant, removing any remaining droppings, eggs or pheromones – these can attract more cockroaches.

Repair Damaged Areas

Fix any cracks, crevices or gaps in walls, floors and cabinets to eliminate potential hiding spots.

When to Use Professional Pest Control Services for Cockroaches

If your infestation doesn't reduce despite your best efforts – particularly with fast-breeding German cockroaches – it may be time to call in the professionals, who can offer more potent solutions and tailored advice. You can find a qualified controller through the BPCA directory.

If you rent, check whether your landlord or housing provider should arrange treatment – especially if the infestation affects safety or health. If you need local help, your council may also offer pest control services.

Cockroach FAQs

What are the first signs of cockroaches in a house?

Common early signs include small dark droppings (pepper-like specks), a musty smell in warm cupboards, shed skins, and sightings at night when you turn on a light (kitchens and bathrooms are most common).

Why do I keep getting cockroaches in my kitchen?

Cockroaches thrive where there's food, warmth and water. The most common causes are crumbs and grease build-up (especially under appliances), unsealed food, overflowing bins, and drips or condensation under sinks or behind fridges and dishwashers. If those conditions remain, they'll keep returning even after treatment.

Do cockroaches bite?

It's uncommon, but cockroaches can bite in rare cases. The bigger concern is contamination: they can spread germs from dirty areas onto surfaces, and can worsen allergies and asthma for some people.

Are cockroaches dangerous to children or pets?

They can be a hygiene and allergy issue, especially for children, and can trigger symptoms in people with asthma or allergies. If you use any insecticide, always follow the label, ventilate well, and keep children and pets away until it's safe.

German cockroach vs Oriental cockroach — which is more likely in UK homes?

In our experience, UK homes throw up both in roughly equal measure. German cockroaches prefer warm kitchens and bathrooms and reproduce quickly; Oriental cockroaches are more associated with cooler, damper areas like basements and drains. Correct ID matters, because German roaches usually need a more structured, persistent treatment plan.

How long does it take to get rid of cockroaches?

It depends on the species and how established the infestation is. With a solid DIY plan (deep cleaning, proofing, monitoring and targeted baiting), you'll usually see trap counts start to drop within 1–3 weeks, but full control can take several weeks because eggs hatch in cycles. If you're not seeing improvement after 2–3 weeks, you'll likely need professional help.

Do cockroach traps work?

Sticky traps are great for monitoring (finding hotspots and confirming whether numbers are falling), but they rarely solve an infestation on their own. Use them to guide cleaning and bait placement, and to check progress weekly.

When should I call a professional for cockroaches?

Get help if you see cockroaches in daylight (often a sign of high numbers), if activity spreads to multiple rooms or flats, if you keep finding them after 2–3 weeks of thorough cleaning, proofing and targeted treatment, or if anyone vulnerable lives in the home (babies, severe asthma or allergies).

Final Thoughts

By following the strategies in this guide, you can manage and prevent cockroach infestations in your home. Early identification and prompt action are key – but the single biggest thing to get right is not to rely on spraying alone: knocking down visible cockroaches without fixing the food, moisture, clutter and harbourage behind them just resets the clock.

Regular cleaning, reducing clutter, controlling moisture, proofing and targeted baiting are what actually clear an infestation. If these don't yield results – particularly with fast-breeding German cockroaches – consider stronger products or professional help. Taking control of the conditions in your home is what keeps it cockroach-free.

We go to great lengths to ensure that all our DIY cockroach control products and kits are effective, fast and easy to use. Explore our range to take control of your pest problems with confidence.