Something is scratching, thumping, or scurrying around over your head, and your first question isn't really "how do I get rid of it" — it's "what even is it?" That matters more than people expect. A squirrel in the attic and a rat in the attic call for different approaches, from how they got in to how they need to come back out. Before you assume the worst or brush it off as nothing, there's a quick way to narrow it down: pay attention to when you hear it, what it sounds like, and how big a hole it would have needed to get inside.
How To Tell If It's A Squirrel
Squirrels keep daytime hours, just like you do. They're diurnal, meaning they're out and active while the sun is up and quiet once it sets. So if the noise you're hearing shows up mid-morning or in the afternoon, that's a strong clue. As for what it sounds like, squirrels are bigger-bodied than most attic pests, and they move like it. Expect heavier, clumsier sounds — rolling, tumbling, or a solid thump as one lands or shifts position. They also tend to need a real gap to get inside in the first place, generally a few inches across, and that gap usually traces back to a damaged roofline, a soffit that's pulled away from the fascia, or a tree limb resting against the roof.
How To Tell If It's A Rat
Rats run on the opposite schedule. They're nocturnal, so the noise tends to start once the house has gone quiet for the night — you're in bed, the lights are off, and suddenly there's activity along the ceiling. Where a squirrel sounds heavy, a rat sounds light and quick: scratching, scurrying footsteps, and the occasional gnawing sound as it works on something. Because a rat's body is so much smaller, it doesn't need much of an opening to get in. Roughly a half-inch to an inch is enough, which is exactly why rat entry points are so much harder to spot on a casual walk around the house than the larger, more obvious gaps a squirrel leaves behind.
Side-By-Side: Timing, Sound, And Entry Point
Here's the comparison laid out at a glance, so you can match what you're hearing to what's most likely up there.
| Feature | Squirrel | Rat |
|---|---|---|
| Active Time Of Day | Daytime (diurnal) | Nighttime, after the house quiets down (nocturnal) |
| Typical Sounds | Rolling, tumbling, heavier thumping as it moves | Light scratching, quick scurrying, and gnawing |
| Entry Hole Size Needed | A few inches across | As small as a half-inch to an inch |
| Movement Pattern | Bursts of heavier movement, then pauses | Frequent, lighter movement along joists and wall voids |
| Common Entry Points | Damaged roofline, gapped soffit, tree branch touching the roof | Small gaps around pipes, foundation, or roof edges that are easy to miss on a visual check |
Why Getting This Right Matters For The Fix
Identifying the animal first isn't just a curiosity exercise — it changes the plan. Squirrels are wildlife, and getting one out safely usually means a one-way exclusion door rather than a standard trap, which is why that job typically falls under our wildlife removal services rather than a routine rodent visit. Rats, on the other hand, call for a different combination of trapping and sealing, and because their entry points are so much smaller and easier to overlook, our attic rodent removal process always starts with a careful inspection rather than guessing based on the sound alone.
That same entry-point-first thinking applies well beyond rodents, too. In Cranford, we run into a lot of older homes with mature trees shading the roofline, and that's exactly the kind of gap wasps look for as much as squirrels do — it's a big reason wasp control in Cranford so often starts with the same roofline check we'd do for a squirrel complaint. In Paramus, the pattern looks a little different: ants are more likely to be working through small foundation cracks at ground level than anything up in the rafters, so ant control in Paramus tends to start down low instead of in the attic. Different pest, different starting point, but the same underlying idea — find the entry point before you decide on the fix.
If the noises you're hearing line up with a squirrel, don't try to handle it solo; a cornered wild animal in a confined attic space is best left to someone with the right equipment and experience. If it sounds more like a rat, our rat exterminator team can trace the entry point, clear what's already inside, and seal things up so it doesn't happen again next season. Either way, you don't have to figure out which one it is on your own — give us a call, describe what you're hearing, and we'll take it from there.