If you’re hearing heavy thumping, scratching or scampering above the ceiling — especially around dusk and dawn — you very likely have possums in your roof, and the lasting fix has two parts most homeowners get in the wrong order: get the animal out humanely first, then seal the roof so nothing can get back in. Skip the sealing and you’re in an endless cycle of eviction and re-entry; seal before the animal’s out and you trap it inside, which is both cruel and a far worse problem when it dies in the cavity. This is our guide to working out what’s actually up there, getting it out the right way, and — the part that’s actually roofing work — closing off the roof so the problem doesn’t simply repeat next season.
There’s an important Queensland-specific point to make up front, because it shapes everything: possums are a protected native species here. You can’t trap and relocate them freely or harm them — the law requires humane handling and, in most cases, release on the same property. That’s not a technicality; it’s the reason the durable solution to a possum problem isn’t “removal” at all. It’s exclusion: making your roof a place they can’t get into, so they move on to a hollow or a tree instead. And exclusion is a roofing job.
Table of Contents:
Possums in Your Roof: What’s actually up there? Reading the noises
Before you can deal with an intruder it helps to know which one you’ve got, and the sounds are surprisingly diagnostic. Possums are heavy — a brushtail possum moving across a ceiling sounds like a small dog, with distinct thumps, heavy scurrying and sometimes loud hisses, coughs or screeches, particularly at dusk when they wake and head out to feed and again at dawn when they return. If the noise is a solid *thump-thump-thump* and it keeps night-time hours, possum is the leading candidate. Birds, by contrast, are lighter and keep daytime hours: fluttering, chirping, scratching and scuffling that starts at first light and quietens at dusk, often concentrated around the eaves, gable ends or a particular gap where they’ve built a nest. Rats and mice are lighter still — fast, skittering, gnawing sounds in the walls and cavity at night.
One more clue worth using is season and behaviour. Possums are most active and most audible in the warmer months and around breeding, when a female may be carrying or sheltering young in the cavity — which is another reason humane, correctly-timed exclusion matters, since sealing a roof with dependent young inside is both cruel and illegal. Birds are most active nesting in spring, when the daytime fluttering and chirping peaks. If the noise is seasonal and heavy and nocturnal, possum; if it’s seasonal, light and tied to daylight, bird. The timing and the weight of the sound will usually tell you which you’re dealing with, and it matters because the entry points and the fixes differ. Possums need a reasonably large gap — a lifted tile, a broken eave, a gap where the roof meets the wall, an open gable vent — and they’re strong enough to enlarge a weak spot. Birds exploit smaller gaps under the eaves, broken tiles, and open ends of ridge capping or barge boards to nest. Knowing what’s up there also tells you how urgent the roof damage question is, because a possum in the cavity can dislodge tiles, tear insulation and foul the space, while a bird nest can block valleys and gutters and bring its own mess. Either way, the noise is telling you something got in — which means there’s a way in that needs finding.
Why the entry point is really a roofing problem
Here’s the reframe that changes how you should think about this: an animal in your roof is a symptom, and the actual problem is the gap it came through. Every possum and every bird got in somewhere, and that somewhere is almost always a fault in the roof — a cracked or slipped tile, a broken or rotted section of eave, a gap where flashing has pulled away, an unscreened gable vent, or a hole where the roof meets an adjoining wall or the fascia. These are the same faults that let in water, which is why an animal problem and a roof repair problem are so often the same problem wearing different clothes. The scratching that’s keeping you awake and the damp patch you noticed last wet season may well trace back to the same broken tile.
This is why calling only a wildlife remover frequently doesn’t solve the problem for good. They can get the possum out — and for the removal itself, a licensed wildlife handler is the right and lawful call in Queensland — but if the roof is left with the same open gaps, another possum or a family of birds simply moves into the vacant, sheltered cavity a few weeks later. Nature abhors a warm, dry, empty roof void. The removal is the first half; sealing the roof is the half that actually ends the cycle, and that’s roofing work: identifying every viable entry point, repairing the damaged tiles, eaves and flashings, and screening the vents. Do that and the animals have nowhere to get in. Leave it and you’ll be making the same phone call next season.
The right sequence: out first, then sealed
Getting the order right is the single most important thing, because reversing it creates a much worse situation. The sequence is: confirm the animal is out, then seal. If you block the entry points while a possum is still inside, you trap it — and a trapped possum will either do significant damage trying to escape or die in the cavity, leaving you with a smell and a clean-up far worse than the original problem, plus a protected animal harmed in a way the law takes seriously. So the roof gets sealed only once you’re confident the cavity is empty, which usually means timing the exclusion for when the nocturnal possum has left to feed, or working alongside a wildlife handler who has removed or excluded it properly.
A common humane technique is the one-way door: a temporary device fitted over the main entry point that lets the possum out when it leaves to feed but not back in, so it excludes itself over a night or two without being trapped. Once the animal is confirmed out, the permanent work begins — and this is where the roofing takes over from the wildlife handling. Every entry point and potential entry point is repaired and closed: broken tiles replaced, damaged eaves and fascia repaired, flashings resealed, gaps at wall junctions closed, and vents screened so they still ventilate but no longer admit animals. Providing an alternative like a possum box in a nearby tree can help the displaced possum settle elsewhere rather than fighting to get back in. Done in this order, the eviction sticks.
The damage they do while they’re up there
Part of the reason to act on a roof intruder quickly, rather than living with the noise and hoping it moves on, is the damage that accumulates while it’s in residence. A possum is a large, active animal in a confined space, and it does real harm to a roof cavity: it dislodges and cracks tiles moving around, tears and compresses insulation to build nesting spots (which quietly undoes the ceiling insulation you rely on to keep the house comfortable), chews on timber and occasionally wiring, and fouls the cavity with droppings and urine that soak into insulation and plasterboard and produce a smell that’s hard to shift. Left long enough, a possum problem stops being a noise nuisance and becomes a genuine roof repair and clean-up bill.
Birds bring a different but real set of problems. Nesting material blocks valleys, gutters and downpipes, which backs water up under the roof edge and into the fascia exactly the way a blocked gutter does — so a bird problem can turn into a water problem in the next big storm. Nests in the cavity or eaves bring mites and mess, and the droppings are corrosive over time. And because both possums and birds enlarge the gaps they use, the entry point tends to get bigger the longer it’s left, which means more weather getting in alongside the animal and a larger repair when you finally deal with it. None of this is a reason to panic, but all of it is a reason not to let a roof intruder become a long-term tenant: the sooner the animal’s out and the roof’s sealed, the smaller the damage and the bill.
Sealing the roof properly — and what else it fixes
Proper exclusion work is thorough by necessity, because a possum or a determined bird only needs one gap. That means going over the whole roof, not just the obvious hole: inspecting the tiles, the ridge lines, the eaves and fascia, the flashings, the gable ends and the valleys, and closing every viable entry while making sure the roof can still breathe. The screening matters — vents and weep holes exist for a reason, so the goal is to exclude animals without sealing the roof so tightly that you create the humidity and ventilation problems that breed mould and rot. It’s a balance a roofer understands and a general handyman often doesn’t.
The upside is that this work fixes more than the animal problem. Because the entry points animals use are the same faults that admit water, sealing the roof against possums and birds also seals it against leaks — you’re closing the cracked tiles, the failed flashings and the gaps that were letting the weather in as well. It’s genuinely worth having the whole roof assessed while the access is set up, since the same visit can catch the cracked and slipped tiles and the crumbling ridge pointing that were the animals’ way in and the water’s way in both. Clearing the gutters of any nesting debris rounds it off. Apex Roof Painting is licensed to work at heights up to 20 metres and fully insured with $20 million public liability, which matters for the roof-access and repair side of this work.
The lasting answer to possums or birds in your roof, then, isn’t a trap — it’s a sealed roof. Get the animal out humanely and lawfully, then close off every way back in, and the problem ends rather than recurring. Apex Roof Painting handles the roofing half of that equation — the inspection, the repairs and the exclusion sealing — across Brisbane, Ipswich, Logan, Moreton Bay and the wider South East, every job backed by our written workmanship guarantee. If scratching in the roof has you looking up at the ceiling at 3am, book a free, no-obligation roof inspection and we’ll find how they’re getting in — and mention this page to claim your 10% new-customer discount.