As autumn leaves begin to fall in the UK, it’s a clear sign that winter is just around the corner. While the season brings festivities and cosy nights, it also invites a variety of pests into our homes and businesses. These unwanted guests seek warmth and shelter from the cold, and the last thing anyone wants to deal with on a chilly, grey day is a rodent infestation. That’s why it’s crucial to start preparing now. Understanding which pests are common during the winter and how to prevent them can save you a lot of trouble in the coming months, ensuring a safer and healthier environment for all.

Common Winter Pests in the UK

Mice and Rats

Mice and rats are more than just a nuisance; they are a health hazard. These rodents are known for carrying diseases like salmonella and hantavirus. As the temperature drops, they look for warm places to nest, often finding their way into homes and businesses. They can gnaw through electrical wires, causing fire hazards, and contaminate food supplies. It’s essential to seal any potential entry points and keep food securely stored to deter these pests.


Squirrels are generally considered less harmful than rats and mice, but they can still cause significant issues. They are known for nesting in attics, walls, and even car engines. Their nesting materials can include anything from leaves to insulation, which can lead to fire risks. Moreover, squirrels can chew through electrical wires and wooden structures, causing both fire hazards and structural damage. It’s advisable to trim tree branches that provide easy access to your home and to seal any openings where they might enter.

Flies and Cockroaches

While many people assume flies and cockroaches are summer pests, these insects are quite resilient and can survive the winter months. They seek out warm, dark corners in buildings, often hiding in basements, attics, and behind appliances. Not only are they unsightly, but they can also spread diseases like dysentery and gastroenteritis. Regular cleaning and proper food storage are key to preventing an infestation.

Wasps and Hornets

Wasps and hornets are generally less active during the winter, but some species overwinter as adults. They find secluded spots like tree hollows or sheds to hibernate, emerging in the spring to build new nests. While they are less of a concern in winter, failing to address a nest could lead to a larger infestation come spring. If you notice any wasp or hornet activity, it’s best to consult professionals for safe removal.

How Pests Survive the Winter


While some pests, such as certain bird species, migrate to warmer climates during the winter, many others stay local. These local pests often find refuge in homes and businesses, where they can stay warm and have access to food. This makes winter pest-proofing all the more essential.


Some insects have a fascinating ability to “overwinter,” or survive the cold months in a dormant state. Flies, cockroaches, and certain other insects can overwinter as larvae, nymphs, eggs, or pupae. They often hide in cracks and crevices, waiting for warmer conditions to emerge and become active again. Understanding the life cycle of these pests can help in targeting them more effectively.


Hibernation is another survival strategy employed by certain pests, such as some species of wasps and even rodents like squirrels. They find secluded, insulated areas like tree hollows, sheds, or even your attic to hibernate during the winter. These pests may not pose an immediate threat during their hibernation, but they can become a problem once they wake up in the spring.

Prevention Tips for Homeowners and Businesses

Sealing Openings

One of the most effective ways to prevent winter pests from entering your home or business is by sealing any openings. This includes cracks in the walls, gaps around windows and doors, and even small holes where utilities enter the building. Silicone or acrylic caulk works well for smaller gaps, while steel wool or hardware cloth is effective for larger openings.

Eliminating Food Sources

Pests are often attracted to readily available food sources. Keeping food properly stored in airtight containers and disposing of waste in sealed bins can significantly reduce the risk of attracting pests. This is especially important in commercial settings like restaurants and grocery stores, where food is abundant.

Regular Inspections

Regular inspections are crucial for early detection of a potential pest problem. Check common hiding spots like attics, basements, and behind appliances. Look for signs such as droppings, gnaw marks, or even the pests themselves. If you find any evidence, take immediate action either through DIY methods or by contacting a professional pest control service.


Winter pests are more than just an inconvenience; they pose serious risks to your health and property. From disease-carrying rodents to destructive insects, these pests can turn your winter season into a nightmare. Being proactive in your pest control efforts is not just advisable; it’s essential.

Call to Action

Don’t let winter pests ruin your season of joy and peace. If you’re facing a pest problem or want to take preventative measures, contact Combat Pest Solutions for professional help in tackling winter pests.