That scratching above the ceiling at 2 am is rarely something you can ignore. A possum in the roof can disturb sleep, damage insulation, foul roof spaces and keep returning if the real entry point is left open. The best ways to keep possums away are not about chasing one animal from the property. They are about removing food and shelter opportunities, then professionally blocking access without trapping an animal inside.
In Melbourne, possums are protected native wildlife. That matters. DIY trapping, poisoning or relocating a possum is not a quick fix – it can be illegal, inhumane and likely to create a bigger problem. The right approach protects your household, your building and the animal.
Why possums keep coming back
Possums are excellent climbers and persistent home-seekers. A gap around a roof tile, eave, pipe penetration or loose fascia board can be enough for them to access a warm, dry roof void. Once they have found a safe den, they may return night after night, even after a loud disturbance sends them temporarily outside.
Food makes a property more attractive too. Uncovered rubbish bins, fallen fruit, pet food left outdoors and accessible bird feeders can turn a passing possum into a regular visitor. Gardens with dense shrubs, overhanging branches and open sheds provide easy travel routes and hiding places.
This is why simply placing a light in the roof, playing noise or using a scent deterrent rarely delivers a lasting result. It may make the area uncomfortable for a short time, but it does not close the entrance or remove the reason the possum chose your property.
Best ways to keep possums away from your roof
Roof entry is the issue that needs the most care. You must never seal a gap until you are certain the possum has exited. Blocking the opening too early can trap a protected animal in the roof, leading to noise, odour, property damage and a far more difficult removal process.
Find the access points first
Check for broken or displaced roof tiles, gaps at the eaves, damaged vents, holes around pipes, loose flashing and breaks in fascia boards. On older homes, a small opening where two building materials meet is often enough. Look for oily rub marks, droppings, disturbed insulation or a repeated path along fences and tree branches leading towards the roof.
A proper inspection is more reliable than a quick look from the ground. Entry points are often hidden near upper rooflines, behind gutters or beneath sections of cladding. In some cases, what sounds like a possum may be rats, birds or another pest, so identifying the activity before work begins prevents expensive guesswork.
Let the possum leave, then install exclusion measures
The lasting solution is humane one-way exclusion followed by durable proofing. A suitable one-way device allows the possum to leave at night but prevents it from re-entering. Once the roof space is confirmed clear, access points can be sealed with materials designed to withstand weather, chewing and repeat pressure.
This work needs to suit the structure. Foam alone, light mesh loosely fixed over a gap, or a rushed patch can fail quickly. Proper possum proofing may involve securing mesh, repairing timber, refitting tiles, closing eave gaps and reinforcing vulnerable joins. The goal is not to make the roof look temporarily closed. It is to make it inaccessible.
If you hear movement in the roof now, do not block holes yourself that afternoon. Arrange an inspection and a planned exclusion process instead. This is especially important during breeding periods, when dependent young may be present.
Cut off the climbing routes
Possums can reach roofs from trees, pergolas, fences, cables and adjoining structures. Prune branches back from the roofline where practical, particularly branches that create a direct launch point. Keep in mind that major pruning should be done safely and in line with local rules, especially for protected trees.
A fence can also act as a possum highway. You may not be able to remove every route, but reducing direct access makes professional exclusion work far more effective. If branches remain hard against the roof, even a well-sealed home is under more pressure than it needs to be.
Make your garden and bins less rewarding
A possum does not need much encouragement. One easy food source can be enough to keep it visiting your yard, climbing onto outdoor furniture or checking the roof again.
Keep rubbish bin lids fully closed and rinse containers that hold food residue. If a bin is regularly tipped over, secure the lid or store it in a protected area until collection day. Bring pet food and water bowls inside overnight, and clean barbecue plates rather than leaving fat and scraps outdoors.
Fruit trees need regular attention. Pick ripe fruit early, remove fallen fruit from the ground and consider netting that is fitted tightly and checked daily. Loose netting can injure wildlife, so it is not a set-and-forget solution. For vegetable patches, physical barriers and well-fitted covers are generally more dependable than repellents.
Bird feeders can be another overlooked food source. If possums are visiting nightly, pause feeding for a period or relocate feeders well away from the house. A tidy yard will not solve an active roof infestation by itself, but it removes the reasons for a possum to keep testing your property.
What usually does not work – and can make things worse
There is no shortage of home remedies suggested for possums: mothballs, ammonia, bright lights, loud radios, chilli sprays and ultrasonic devices. Their results are inconsistent at best. A hungry or established possum often tolerates the nuisance, while your household is left with the smell, noise or ongoing mess.
Poisons are not an option. They are unsafe around children, pets and non-target wildlife, and they do not address the entry point. Poisoning can also leave an animal dying in an inaccessible roof space, creating a serious odour and fly problem.
Trapping and relocating are equally poor choices for most property owners. Victorian wildlife laws apply, and relocated possums may struggle to survive in unfamiliar territory. More importantly, removing one possum without proofing the building simply leaves an opening for the next animal.
When to call a possum removal professional
Call for professional help when you have repeated roof noises, visible property damage, droppings in the roof cavity, a possum entering through a high or unsafe location, or failed DIY attempts. The same applies if you suspect a mother and young, or if you cannot confidently identify what is in the roof.
A thorough service should start with an inspection, not a blanket promise to patch every visible hole. You need the likely entry points identified, a safe plan to allow the possum out, durable exclusion work and clear advice on reducing future access. Photographs of problem areas are useful because they show exactly what has been found and what has been repaired.
For homes across Melbourne’s bayside and inner suburbs, older rooflines, dense gardens and adjoining properties often make possum access more complicated than it first appears. Zeropest approaches possum work as a prevention job, not a one-night removal job: inspect the building properly, exclude the animal humanely and secure the access points that caused the problem.
Keep the fix working after exclusion
After the exclusion work is complete, make roof and garden checks part of seasonal maintenance. Inspect after strong winds, storms, roof repairs or renovation work, as these can reopen weak points. Keep vegetation trimmed back, watch for loose tiles and deal with gutter or fascia damage before it becomes an entry hole.
If you hear scratching again, act early. A prompt inspection is easier than waiting until an animal has established a den, damaged insulation or produced young in the roof. A quiet roof, sealed entry points and a less tempting yard are the practical signs that your possum problem has been dealt with properly.
