Timing is the best clue, volume is the second, and between them you can usually work out what you are dealing with before anyone visits.
Timing is the strongest clue. Daytime activity, particularly early morning and late afternoon, points to squirrels. Noise that starts after dark and fades by dawn points to rats or mice.
Volume is the second. Squirrels sound like something substantial — thumps and rolling. Mice are a light, fast skitter. Rats sit between the two.
| Squirrel | Rat | Mouse | |
|---|---|---|---|
| When | Daytime, dawn and dusk | After dark | After dark |
| Volume | Heavy, unmistakable | Moderate | Light |
| Character | Thumping, rolling, running | Scratching, dragging | Fast skittering |
| Gnawing sound | Loud, sustained | Audible | Faint |
| Droppings | Large, rounded | Tapered, ~15mm | Small dark specks |
| Insulation | Torn up in quantity | Some nesting | Small nests |
| Seen outside | Often, on roof or fence | Rarely | Rarely |
| Price | £280 | £190 flat / £240 house | £190 flat / £240 house |
Squirrels are diurnal — awake and active in daylight, asleep at night. Rats and mice are largely nocturnal. That difference is behavioural and consistent, which makes it far more reliable than trying to judge volume through a ceiling.
So the question worth answering carefully is: when exactly do you hear it? Lie awake one night and listen. Sit quietly one afternoon and listen. Note the times over three or four days.
Heavy thumping at three in the afternoon is a squirrel. Light scratching at three in the morning is a mouse. Most cases are that simple.
Unmistakably substantial. People describe it as someone rolling a ball, dragging something, or walking about upstairs. Bursts of activity rather than constant noise, concentrated early morning and late afternoon. Often accompanied by heavy gnawing sounds.
Moderate scratching and scurrying, often with dragging sounds as material is moved. Mostly after dark. May be heard in walls and under floors as well as in the loft — rats range through a building more than squirrels, which tend to stay in the roof space.
Light, fast, skittering. Often described as sounding like something very small running in short bursts. Almost entirely nocturnal. Frequently heard in ceiling voids and wall cavities rather than only the loft.
Fluttering, scrabbling and often audible calls, particularly at dawn. More constant than rodent noise and concentrated near the eaves. Nesting birds have legal protections, so identification matters here.
A steady buzzing or rustling, most likely from mid-summer, sometimes described as sounding like a distant radio. If you also see wasps entering the roof from outside, that is what it is — and it is £90 fixed cost.
See our complete service, published price and treatment information.
View Squirrel Control Harrow Weald →If you can get into the loft safely, the droppings settle it:
That last one matters. All UK bat species are legally protected, and it is an offence to disturb them or damage a roost. If you find droppings that crumble to a glittery powder, stop, do not disturb anything further, and seek advice from a bat conservation organisation before any work is done in that roof space.
| Animal | Service | Price |
|---|---|---|
| Squirrel | Trapping | £280 |
| Rat | Treatment | £190 flat / £240 house |
| Mouse | Treatment | £190 flat / £240 house |
| Wasps | Nest treatment | £90 fixed |
| Birds | Depends entirely — legal protections apply | Ask us |
| Bats | Protected — do not disturb | Seek specialist advice |
This is why we would rather help you identify it than take a booking. A squirrel job and a mouse job are £90 apart, and getting it wrong wastes a visit.
Read nextWhat Should You Do if You Suspect a Squirrel in Your Harrow Weald Loft? →Tell us what you are hearing and when, and we will give you an honest view before you book anything. If it is rodents rather than squirrels, that is what we will tell you — and it costs less.
Read nextRat Control Harrow Weald – How Much Does Professional Treatment Cost? →Occasionally. A loft with an open entry point may host more than one species over time, and squirrel damage frequently creates the opening that rodents later use.
Not necessarily. Activity can pause seasonally or when young disperse. The entry point is still there.
Only if it is safe and boarded. If you cannot get up there safely, do not — tell us instead.
If it is a buzzing rather than a scratching, that is wasps — £90 fixed cost in Harrow Weald, guaranteed.
Timing above all. Squirrels are active in daylight, especially early morning and late afternoon. Rats are active after dark.
Heavy and substantial — thumping, rolling and running, in bursts rather than constantly, often with loud gnawing.
Light, fast skittering, almost entirely at night, often in ceiling voids and wall cavities as well as the loft.
Squirrel droppings are larger and rounded; rat droppings are tapered and around 15mm; mouse droppings are small dark specks.
Those are likely bat droppings. All UK bats are legally protected — do not disturb anything further and seek specialist advice.
Yes — fluttering and scrabbling with audible calls, especially at dawn. Nesting birds have legal protections.
Squirrel trapping £280; rat or mouse treatment £190 for a flat or £240 for a house; wasp nest £90 fixed.
Not necessarily. Activity pauses seasonally, and the entry point is still there.
Tell us what you hear and when. Identifying it properly is the difference between a £280 job and a £240 one.
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