With temperatures rising across the UK, many of us are focused on keeping our homes cool. But the summer heatwave could also be attracting an unwelcome visitor to your property: rats. While they're often associated with colder months, experts say summer is actually one of the key times for rat populations to grow. Even more surprisingly, they only need a gap of around 20mm – roughly the size of a £1 coin – to get inside your home.
‘Many homeowners will be surprised that rats only need a gap of around 20mm, roughly the size of a £1 coin, to gain access to a property,’ says Saif Derzi, property expert at Property Buyers Today. ‘Rat infestations can cause significant damage to a property, from chewed electrical wiring and damaged insulation to compromised pipework.’
Below, we explain why hot weather can increase rat activity, the damage infestations can cause, and the signs you should watch out for.
Why rats are more common during hot weather
While these pests are often thought of as a winter problem, summer conditions can encourage them to move closer to homes.
‘Hot weather often forces rats out of drains, sewers and underground burrows as they search for food and water,’ says Saif. ‘At the same time, gardens become more attractive thanks to barbecues and food waste.’
Leftover food, overflowing bins, and water sources such as pet bowls can all make gardens more appealing.
How to stop rats getting into your home
The good news? Prevention measures are often straightforward – if carried out early enough, that is.
‘The first step is identifying and sealing potential entry points before rats can get inside,’ says Saif.
Homeowners should inspect their property for gaps around pipes and cables, damaged air bricks, cracks in walls and foundations, and broken drains. It's important not to underestimate how small an opening a rat can squeeze through.
‘Small gaps around pipes and cables can often be sealed using wire wool and cement or specialist expanding foam, while damaged air bricks should be fitted with metal mesh covers that maintain ventilation while preventing access,’ Saif explains.
It's also worth reducing anything that could attract rodents in the first place. Keeping bins securely closed, clearing away food waste promptly (yes, even during a lovely alfresco dinner), and avoiding leaving pet food bowls outside overnight can all help make your property less inviting to them.
Signs you may have rats
If rats have already found their way onto your property, acting quickly can help prevent a larger infestation from developing.
‘Common warning signs include droppings, scratching noises, gnaw marks and damage to insulation, wiring and pipework,’ says Saif.
While preventive measures can reduce the risk of a problem, pest control is usually the most effective solution once rats have become established, as DIY solutions often fail to tackle the root cause. To find a certified professional in your area, search on the BPCA site.
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