Silverfish Control & Natural Remedies

Silverfish are small, wingless insects found in homes right across South East Queensland, usually hiding in bathrooms, wardrobes and kitchen cupboards. They are not a health risk, but they chew through paper, books, wallpaper, cardboard and natural fabrics, so a quiet infestation can quietly ruin stored clothes, documents and keepsakes. Because silverfish are nocturnal and breed out of sight, most people do not realise how many there are until the damage shows up.

Pest-Ex provides professional silverfish control and treatment, and because silverfish are usually best dealt with alongside your other household pests, we typically treat them as part of a general pest service rather than a one-off.

What silverfish look like?

Silverfish are easy to recognise. They are silver to grey, sometimes with a slight brown or blue tint, and their size ranges from around 12 to 25 millimetres. The body is shaped like a teardrop or carrot, tapering towards the tail, with three bristles at the rear and two long antennae at the front, and they move with a distinctive wriggling, fish-like motion that gives them their name.

Where do silverfish hide in your home?

Silverfish can survive in most conditions but prefer dark, damp areas. The most common spots we find them are bathrooms, laundries, linen cupboards, wardrobes, sheds, garages, shoeboxes and the backs of kitchen cupboards. They feed on materials rich in starch and sugar, which is why you find them among paper, books, cardboard, wallpaper glue, linen and silk. If you are seeing them regularly in one room, there is almost always a moisture source nearby.

What attracts silverfish?

Two things bring silverfish into a home: moisture and food. Humid, poorly ventilated rooms give them the damp they need, and stored paper and natural fabrics give them an endless food supply. Leaking pipes, condensation, damp towels and cluttered cupboards create the ideal conditions, which is why bathrooms and storage areas are such reliable hotspots in our humid Queensland climate.

How to get rid of silverfish?

If you are dealing with silverfish, the approach is the same whether you start yourself or call us in:

1. Reduce moisture in bathrooms, laundries and under the house, since damp is what draws them.
2. Declutter and store paper, books and off-season clothes in sealed containers.
3. Seal cracks in walls, skirting and around pipes where they hide and lay eggs.
4. For anything more than the odd sighting, book a professional treatment, because silverfish nest in roof voids and wall cavities you cannot reach.

Home measures help keep numbers down, but an established population usually needs a professional treatment to clear properly.

How to get rid of silverfish in the bathroom, wardrobe and cupboards?

Silverfish love moisture and dark spaces, which is why these three areas are where people see them most.

• Bathroom: improve ventilation, dry floors and walls after showers, fix any leaks, and use a lavender or vinegar spray around corners and drains.
• Wardrobe: place dried bay leaves or cedar in drawers, and store seasonal clothes in airtight containers so they cannot be reached.
• Cupboards: clean pantry shelves regularly, keep food in sealed containers, and tuck cloves into the corners where silverfish hide.

These small changes reduce numbers and cut the risk of them returning, particularly when paired with a professional treatment of the roof void and cavities.

Professional silverfish treatment

Silverfish are hard to get rid of with sprays alone, because they are nocturnal and shelter deep in roof voids, wall cavities and the backs of cupboards. Our pest control treatment works with that behaviour rather than against it.

A technician applies a fine film of insecticidal dust through the roof void and into the gaps under and behind benches, cupboards and shelving, the exact spaces silverfish travel through at night. Because they have to move across these surfaces to feed, it is almost impossible for them to avoid contact with the treatment. Applied this way, it reaches the harbourage points a surface spray never will, and it keeps working over time. The products we use are chosen to be safe for your family and pets once applied as directed.

Since silverfish rarely turn up alone, the most practical option for most homes is to have them treated as part of a general pest service that also covers cockroaches, spiders and other common pests, so your whole home is protected in one visit.

Natural silverfish repellents you can try first

If you have only seen a few silverfish, there are natural repellents worth trying before anything else. They work by targeting the scents and conditions silverfish dislike, and they are safe around family and pets, though they are most effective when used consistently and they will not clear an established infestation on their own.

• Lavender oil: silverfish avoid the scent. Mix with water in a spray bottle and apply around skirting boards and inside cupboards.
• Cedar: cedar balls or cedarwood oil in drawers and wardrobes help keep them away from clothes.
• Bay leaves and cloves: tuck dried bay leaves or cloves into pantry corners and drawers where silverfish appear.
• Diatomaceous earth: a light dusting in dry cracks and voids damages their outer shell on contact.
• Reduce damp and clutter: the single most effective “natural” step is drying out the room and removing the paper and fabric they feed on.

If silverfish keep coming back after this, it usually means there is a larger population nesting out of sight, and that is the point to call for a professional treatment.

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