Blog>Expert Advice>Are noises in your attic a sign of pests?
Last updated: 10 February 2025
Are noises in your attic a sign of pests?
Pests such as mice and rats can cause havoc to your home. But what are the signs to look out for? We show you how to spot the warning signs.

Discovering signs of mice, rats, and other pests is every homeowner's worst nightmare, and understandably so. Vermin can multiply fast, spreading nasty germs and diseases. They can also cause catastrophic damage by gnawing through woodwork, furniture and electric wiring, putting your home at risk of flooding or fire.
Unfortunately, dark, quiet, rarely disturbed loft spaces are perfect breeding grounds for pests. So, if things go bump in the night, it's time to investigate and call in the experts. Read on to learn the telltale signs of pests and how a professional pest controller can help.
Telltale signs of mice and rats
If you suspect mice or rats are in your attic, your first instinct will be to speed dial your nearest pest control professional. But before doing that, it's a good idea to inspect the attic yourself for signs of habitation.
Signs of mice
One cute, furry mouse might seem harmless. But rodents multiply fast, so this isn't a problem to ignore. Signs of mice in the home include:
Smell – A stale ammonia odour. It is not as noticeable if one or two mice are on the loose. But if you're dealing with an infestation, a foul odour is one of the first giveaways
Droppings – Mice droppings are a dark brown/black colour, spindle-shaped with pointy ends, and roughly the size of a grain of rice (1/2 cm)
Noises – If there's enough of them you might hear faint scratching
Gnaw marks – Nibbles and holes in your electric cabling, woodwork or stored items in the loft are all warning signs
Signs of shredding - Shredded paper, plastic, fabric or loft insulation are all favourites for mice building nests
Signs of rats
Discovering rats in your attic is distressing, but it's more common than you'd think. Rats can squeeze through small holes the size of a ten-pence piece and climb as high as five feet, meaning loft spaces aren't out of bounds.
Here are the telltale signs of rats to look out for:
Rat smells – A foul ammonia odour caused by the rodent's urine
Decomposing smells – If you've attempted to lay a trap previously, that could be the cause
Rat droppings – Rats leave dark, pellet-shaped droppings around 1 ½ to 2cm in size. They are noticeably larger than mouse droppings
Noises – Distinct gnawing, scratching and squeaking noises point to rats
Gnaw marks – Inspect your stored items in a loft space and wiring for signs of gnawing
Rats nest – Like mice, rats love to shred paper, plastic, fabric and loft insulation to build nests
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Signs of other pests
Unfortunately, rats and mice aren't the only pests fond of setting up homes in warm, quiet attics. Birds, squirrels, bats, and other creeping critter insects can also find their way in.
Let's look at the common tell-tale signs of other pests that could be in your loft space:
Birds
Noises – birds flapping or chirping
Droppings
Nests
Squirrels
Noises – scratching sounds
Droppings – similar in size to rat droppings, about 1 ½ to 2cm
Bats
Noises – distinct vocals at night
Droppings – dark brown or black and 4-8mm long, much smaller than other rodents
Wasps and flies
Noises – continuous, loud buzzing sound
Sightings – can often be seen in window fixtures or floor cavities in your loft space
Nests – wasp's nests resemble a papery balloon or rugby ball. For flies, look for a small cluster of black spots (eggs). If not treated, fly clusters will return year after year

When to call in the professionals
Less squeamish homeowners might be tempted to save money by setting traps, poison, or smoke bombs themselves. However, mice, rats, and other vermin multiply at an alarming rate. Therefore, we always suggest getting the experts in to eliminate them fast – once and for all.
To start your search for experienced pest controllers near you, enter your postcode in the box below. All our members must pass up to 12 checks to be listed in our directory.
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Top tip – Look for a professional pest controller who's also a British Pest Control Association (BPCA) member. That way, you can be sure you're eliminating the pests humanely and efficiently. They also have a pesticide licence if this method of treatment is needed.
You can read about the typical methods used to eliminate mice and rats from your home in our expert guide.
How much does a pest control professional charge?
How much you can expect to pay to remove pests from your home depends on the scale of the problem and the method of treatment recommended.
However, on average, pest control services cost around£180, including materials and tools. Why not look at ourpest control cost guide for more detailed information?
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Final thoughts
Never ignore telltale signs of pests – if you act fast, it could stop an infestation
Always hire professionals – this is one job where experience is crucial
Maintenance is key to preventing a pest infestation
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