Rat Signs
Sounds - Scratching and Crawling.
Dropping - Brown Rat - blunt, spindle - shaped, 1 ½ to 2cm. Black Rat - pointed, 1 ½ cm long.
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Noises in the Loft
Noises in your loft can be more than just an annoyance. Often, they are a signal of unwanted guests like rats, squirrels, mice, bats or even birds. Your loft (attic, roof space, garret – the area directly beneath your roof) may seem a dark, dusty, spider and cobweb filled junk space, but for pests it's the perfect, weatherproof, safe from predators and unseen hideaway.
Rodents and squirrels will happily move in, shredding your stored belongings as nesting material and gnaw on roof beams, cables and potentially electrical wiring, causing a potential fire risk. Bird, rat and mice droppings contain harmful bacteria that could pose a health risk. Their nests and droppings are also ideal breeding grounds for biting insects that could migrate into your living spaces.
While you may rarely venture into this space, pests thrive in undisturbed environments, finding shelter and breeding grounds away from household activities. What’s more, these intruders can cause property damage and health risks, making early identification and action essential. Therefore, if you hear persistent scratching, flapping or odd noises overhead, it’s important to investigate before a minor problem becomes a costly and potentially serious infestation.
Why can I Hear Noises in my Loft?
Noises in lofts are commonly caused by pests, particularly in winter, including rodents (mice, rats, squirrels) scratching, chewing, or scurrying. Other culprits include birds nesting (flapping), wasps or flies (buzzing), or bats (squeaking). Structural sounds, such as wood or metal expanding/contracting, can also cause odd sounds.
Rodents and squirrels are some of the most common loft invaders, seeking safe shelter away from daily household activity. These animals will often shred any soft materials they find—such as insulation, cardboard boxes, or stored fabrics—to use as bedding for their nests. You might also notice gnaw marks on wood, roof beams, pipes, and even electrical wiring, which can pose a significant fire hazard and cause extensive damage.
Alongside structural threats, bird and rodent droppings can quickly accumulate, carrying harmful bacteria and pathogens that may impact your household’s health. Their nests, as well as their droppings, create an environment where insect pests like fleas and mites thrive, often hitching a ride into the main areas of your home. Therefore, early identification and prompt action are essential to avoid a small pest presence turning into a much bigger problem. By investigating unusual sounds, new droppings, or signs of damage, you can help protect both your family’s well-being and the structural integrity of your property.
Common Pest Noises in Lofts
Identifying the pest sounds coming from your loft or attic space can help you pinpoint the intruders, whether it's a rat’s nest or a colony of wasps. Different pests produce unique noises depending on the species and the activity. For example:
- Rodents like rats and mice often make persistent scratching, scurrying, or gnawing sounds, especially at night when the loft is quiet.
- Squirrels can be heard with louder, more forceful scratching or scampering, frequently in the early morning or late afternoon.
- Birds, particularly when nesting, tend to create flapping, rustling, and chirping noises that can be heard during the day.
- Wasps usually generate a constant buzzing or humming sound, sometimes accompanied by tapping as they build their nests.
- Cluster flies in large groups generate a low, droning buzz. Unlike the erratic, high-pitched "zip" of a single housefly, thousands of cluster flies create a constant, low-frequency hum or drone.
Listening closely to these sounds and noting the time they occur can give you useful clues about the type of pest present, helping you take the appropriate steps to address the issue quickly and safely. Don't ignore these noises if they are persistant. Take time to inspect your loft space, carefully checking for signs of distrurbance, shredded materials (potentially used for nesting), chewed items or gnaw marks on wood beams, other solid items, and droppings, pellets or poop.
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Squirrels - Sounds - Vocals and Scratching - Droppings - Similar to Brown Rat Droppings, rounder, 1½ to 2cms. Discover more about UK Squirrels »
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Bat - Sounds - Sharp vocals at night - Droppings - dark brown or black, 4-8mm long, crumble into a fine powder when crushed. Learn more about UK Bats >>
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Wasps & Flies - Sounds - buzzing - Signs - visible sighting of insects or masses of insect bodies in the window fixtures or floor cavities. Learn more about pest insects >>
Rats in Loft
Discovering rats in your loft is a serious issue, even if they are not in your living spaces. These unwelcome guests can cause damage to your property and possessions as well as pose health risks, so urgent action is vital.
Since rats can gnaw through insulation, pipes, and even electrical cables, the risk of costly repairs increases the longer they are present. Their droppings and urine can spread harmful pathogens like Leptospirosis and Salmonella that can threaten your family’s well-being. Beyond physical damage, rats reproduce quickly, so a small problem can rapidly develop into a large infestation if not dealt with effectively.
It’s important to identify the signs early—such as scratching noises at dawn or dusk, gnaw marks, and small dark droppings—and take swift steps to eliminate them from your loft space.
Prevention is key: While rodent proofing your loft space is a practical way to prevent future infestations, it's essential to treat any existing rat infestation first.
Mice in Loft
Mice in your loft need to be treated quickly, to avoid an infestation taking hold. Mice are agile and can squeeze through tiny gaps, as small as 5–6 mm (the width of a pencil) making it important to seal cracks, holes, or gaps around pipes and roof tiles.
While traditional traps and baits may help, understanding their nesting habits and entry routes will improve your chances of successful removal. Since mice breed rapidly, even a small number can become a significant issue, leading to more extensive contamination and risk to your stored belongings.
Regular inspections and swift action are essential to keep your loft—and home—free from mouse trouble. Look for small, dark droppings scattered along walls or in corners, fine shredded materials used as nesting, gnaw marks on wood, cables, or stored items and a strong, musty odour, especially if an infestation is well established.
Learn more about how to spot the signs of mice and how professional mouse control in your home can best eliminate their presence.
Birds in Loft
Pigeons or other birds in your attic will create mess, health risks and annoying noises. Removing birds from your property during the breeding season is not possible as all wild bird species (including their nests and eggs) are protected by law in the UK by the Wildlife and Countryside Act (1981). Therefore, it’s crucial not to attempt removal during breeding season, as disturbing bird nests can lead to fines and prosecution.
Since birds can block vents or create build ups of droppings, structural and hygiene concerns may arise in the home. Accumulated bird droppings harbour bacteria and pathogens and can worsen respiratory problems for sensitive family members.
To help prevent further bird problems, look for signs of entry such as feathers, droppings, or visible nests near the eaves or roof space, and schedule professional bird proofing at the appropriate time of year.
Preventative measures like blocking entry points, and proofing should be done outside of nesting season. Other professional options for deterring pigeons, gulls and other birds are spikes, hawking (using Harris hawks), wire systems, bird netting or RIBs intelligent acoustic deterrent.
How to Deal with Wasps in the Loft
Wasps in lofts are a common infestation over the spring and summer months. An attic space can provide the perfect location for them to establish a nest or even multiple nests, and they are difficult to get rid of without professional help. They can be incredibly dangerous if you are sensitive to wasp stings.
To get rid of wasps you do ‘not’ need to remove the nest, but you do need to effectively treat it and the nesting wasps. Due to the risks associated with wasp stings and the potential for nests to be hidden in hard-to-reach areas, it is advisable to contact a professional pest control service. Rentokil experts are equipped with the knowledge, experience, and personal protective equipment needed to ensure safe and thorough wasp nest treatment.
If you notice buzzing noises or frequent sightings of wasps in your loft or entering under eaves take extreme care not to disturb the nest, as this could provoke aggressive behaviour and increase the risk of stings.
Sealing off entry points and avoiding leaving food sources accessible in your roof space can help deter future infestations.
Cluster flies in your Attic
Cluster flies, (Pollenis rudis) often referred to as 'attic flies', are a common issue in many homes—particularly in loft spaces where they gather in large numbers during the cooler months. These flies are distinguishable from regular houseflies by their sluggish movements and tendency to cluster on windows, lights, and walls where sunlight is present.
Unlike some other fly species, cluster flies do not breed indoors or feed on household waste; instead, they enter attics and roof spaces to hibernate, seeking the warmth and shelter your loft provides. Unfortunately, their presence can create an unsightly mess, especially when large groups of dead flies accumulate or if maggots are found, signalling a more severe infestation.
If not dealt with promptly, cluster flies may continue to return each year, as they are highly persistent once a suitable hibernation site is established. For smaller, isolated problems, DIY cleaning and the use of appropriate fly control products may offer some relief, though persistent or significant infestations often require professional pest control solutions to ensure complete eradication and prevent recurrence.
Regular inspections, sealing entry points, and maintaining a clean loft environment are effective ways to minimise the chances of cluster fly invasions in the future.
Establishing the type of fly species causing the problem is key to identifying the most appropriate and effective treatment method.
Insect Infestation in your Attic
An insect infestation in a loft is most likely caused by attraction to food, textiles or wood stored in your loft, or they may be living off the droppings of other pests in your loft space such as rats, squirrels, mice, or birds. Insect infestations in attics commonly include cluster flies, spiders, ants, mites and beetles, and are often caused by easy access, warmth, and available food or debris.
Some insects can damage stored belongings, insulation, or even the structure of your property if left unchecked. Since many species reproduce rapidly in the warm, sheltered environment of a loft, prompt action is important to prevent the problem from getting worse.
Deep cleaning and the use of amateur insecticides for DIY use may help to keep insects under control, but you will need professional treatment to completely eradicate the infestation by stopping the life cycle of the pest insects. Rentokil has extensive experience in eliminating insect infestations, so you can be sure we have the right solution for you.
Identify insects by listening for buzzing, tapping or rustling, and looking for damaged insulation and fabrics, or nesting materials. If you notice signs such as visible insects, larvae, or droppings, acting quickly. Seal entry points with mesh or sealant and deep clean.
Find out more on how to deal with particular insects you may find in your loft:
✔ Moths and their caterpillars attacking clothes and fabrics
✔ Woodworm boring into timbers and wooden items
✔ Other Insects and creepy crawlies
Get Rid of Insects in Your Attic
Find out more on problems insects cause.
Squirrels in Loft
Squirrels can cause significant damage by gnawing on wood and electrical cables. They can be removed by catching them in traps. It is possible to use DIY traps, although great care needs to be taken when handling cages with live squirrels, as they are likely to bite and scratch. Our highly trained and professionally qualified technicians, with credentials recognised by the pest control industry, BPCA and NPTA are trained to remove squirrels safely.
It’s important to be aware of the UK’s regulations regarding grey and red squirrels: releasing a trapped grey squirrel into the wild is an offence, and they must be dispatched humanely, while red squirrels are protected and must be released back into the wild.
It is essential to protect your home against squirrels to stop them re-inhabiting. Professional pest controllers can assess entry points and recommend effective proofing solutions, such as trimming overhanging branches or vegetation and sealing gaps in your roof space, to ensure squirrels don’t return. Since they are persistent and intelligent creatures, thorough prevention measures are essential for long-term protection of your attic and wiring. If you would like further advice about squirrels or would like to arrange a visit from a Rentokil technician, contact us.
Bats in your Loft
Bats are protected, endangered species and it is an offence to try to kill or remove bats or to change or block their roosts. Even if bats have left your attic, it is an offence to block the roost - bats return to the same place every year, so empty bat roosts are also protected.
If you suspect, or are aware that bats are roosting in your loft space, you must seek advice from the relevant authorities and you should consult with the Bat Conservation Trust before taking any action. Attempting DIY pest control or using chemicals when bats are present is strictly prohibited and can cause them harm and result in legal consequences. Instead, always consult with licensed professionals who understand how to comply with UK wildlife protection laws and can guide you safely and legally.
Identifying Pests by Sounds
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Scratching Sounds - Scratching and gnawing sounds may indicate a rodent type animal such as a mouse, rat or squirrel.
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Flapping - Flapping sounds can indicate birds have nested in your attic, birds will be most active in early morning. Bird can cause heavy damage to your property and must be swiftly dealt with.
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Vocals - Shrill squeaks and vocals can indicate rats or mice, sharper 'shrieks' can be more serious and indicate infestation.
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Buzzing Sounds - A distinct buzzing sound will indicate a wasp or flying insect infestation. Flying insects nest and carry disease, they will not go away permanently unless treated professionally.
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Pests in my Loft FAQs
Below you'll find answers to some of the most common questions about pests in your loft. Homeowners often wonder how to identify which animal is causing the noises above their ceiling or what the risks are of having pests like rats, mice, birds, or wasps in their attic.
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Is it common to have rats in your loft?
It is relatively common, particularly in older UK properties or terrace housing, however rats are normally found at ground level and are mostly associated with drains. Rats often enter lofts via cavity walls, redundant drain pipes, or by climbing external vegetation. Once inside, they use loft insulation for nesting. Their presence is usually signalled by large droppings, a distinct ammonia smell, and loud scratching noises at night.
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Is it normal to have mice in the loft?
While not "ideal," it is very common, especially during autumn and winter months. Mice seek the warmth of loft insulation and are excellent climbers. While they seem harmless, they can contaminate insulation with urine and droppings and, like rats, pose a risk by gnawing on cables and plastic pipes.
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Can rats in the loft get in the house?
Yes, rats are highly mobile and will use internal wall cavities, boxed-in piping, and floor voids to move from the loft into kitchens or living areas in search of food. If you hear scratching in the loft, it is only a matter of time before they explore the rest of your property.
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Should I worry about wasps in my attic?
A single wasp is no real concern, but an active nest requires attention. In spring, queens start new colonies; by summer, a nest can hold thousands of wasps. If the nest is near a loft hatch or integrated into the structure, it poses a sting risk and should be professionally treated.
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Are birds active at night in lofts?
Most UK birds, like starlings or sparrows, are diurnal and remain quiet at night. However, if you hear heavy thumping or "panting" sounds after dark, it may be pigeons settling on roofs. Significant nocturnal noise is more often a sign of rodents or bats rather than common garden birds.
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