The obvious signs are easy. These are the five that get noticed and explained away, sometimes for a whole season, because none of them looks like an animal problem.

One: the pet that stares at the ceiling
A dog or a cat fixed on one part of a ceiling, repeatedly, over several days. Pets hear and smell what the household cannot, and they are frequently the first evidence there is. It gets treated as an eccentricity, and it is worth taking as a finding — not least because it points at a specific part of the roof.
Two: the house is harder to heat
Not dramatically. Just slightly, and it gets attributed to the weather or to prices. Damaged insulation costs a little every day rather than a lot at once, which is exactly why it never presents as an event. A room that has become noticeably colder than the rest of the house is worth a look at the loft above it.
Three: one light circuit that has stopped working
A landing light that has been out for a fortnight, a socket nobody uses that has gone dead, a breaker that tripped once and reset fine. Each of those on its own is a small domestic annoyance. Together with loft noise, they are a reason to call an electrician today rather than a reason to add it to the list.
Four: debris that keeps appearing in one place
A few fibres on the same upstairs windowsill each week. A scatter of fragments on the conservatory roof. A little heap in the same corner of the border. It gets swept away without a thought, which is precisely why the pattern never becomes visible. Clear it once deliberately, and see what comes back.
Five: the sound somebody else in the house has mentioned
Frequently a child, and frequently at bedtime, and frequently dismissed. The afternoon and early-evening window is masked by the household being busy, so it is often only heard by whoever is upstairs alone. If one person keeps mentioning it and nobody else has heard it, that is worth an early morning rather than a reassurance.
What these five have in common: each has a perfectly reasonable innocent explanation, which is exactly why they buy the problem several months. Two of them together is worth three days of noting times.
Why the delay costs
Because the damage is continuous and invisible. Gnawing happens daily, insulation is flattened and contaminated throughout, and cable is at risk the entire time — and none of it shows up inside the house until months later.
What to do with a suspicion
Three days of notes and a ten-minute walk round the outside with a phone. It costs nothing, it produces a real answer either way, and it is the whole of what is needed before calling 01502 630 122.
Questions
My dog stares at the ceiling. Is that really a sign?
It is one of the most commonly reported first signs, and it points at a specific part of the roof. Worth taking seriously.
Could a colder bedroom really be squirrels?
Where the insulation above it has been flattened or hollowed, yes. It is a gradual change, which is why it gets attributed elsewhere.
Only one person in the house hears it. Does that mean anything?
Frequently yes. The afternoon window is masked by a busy household and is often heard only by whoever is upstairs alone.
Squirrel Control Brandon
Squirrel control in Brandon is £280 fixed cost. Proofing work, where it is needed afterwards, is £180. Call 01502 630 122 and tell us what you have heard or seen.
For squirrel control in Brandon, call 01502 630 122, or read the Brandon squirrel control page.