Plumstead is a settled, leafy suburb with long-standing families, a lot of oak and jacaranda shade and older homes that have been added onto over the years. That patchwork of old and new building is what keeps us busy here.
Fishmoths in Plumstead homes
Fishmoths and silverfish like Plumstead's damp built-in cupboards and the rooms above damp under-floor voids. They eat books, papers and clothes.
We treat cupboards, cracks and skirting boards and point out where damp is coming up from the floor. The damp rising from under-floor voids keeps skirting boards and the backs of cupboards humid, especially on outside walls. Clearing blocked air bricks to let the void breathe, using moisture absorbers in winter and keeping papers in sealed boxes help keep them away.
Plumstead sits below the Constantiaberg on the wetter side of the peninsula, so winters are properly damp.
Fishmoths show up in older homes with damp under-floor spaces.
What gives them away
Tick every sign you have noticed. It takes ten seconds.
Why it matters: Fishmoths do not bite or spread disease, but they cause slow, steady damage. They eat the glue in book bindings and wallpaper, the starch in fabrics and paper, and the surface of photographs and documents. For offices, schools, libraries and archives, they can damage records that cannot be replaced. Their presence is also a strong clue to damp or poor ventilation that may be causing other problems in the building.
Something most people miss
Fishmoths can live for several years and can survive months without food. That is why a single wipe-down does not work and why treatments that keep working in cracks are so useful.
Fishmoths are harmless to children and pets, which means you can take your time and choose a gentle, targeted treatment rather than anything heavy-handed.
How we handle fishmoth control in Plumstead
Fishmoths often live in roof spaces, wall voids and behind cornices, so a fine insecticidal dust blown into the ceiling void is one of our most effective tools. Inside, we apply a targeted residual treatment into cracks, cupboard corners, skirting gaps and behind bookshelves rather than spraying open surfaces. Fishmoths are long-lived and lay eggs in hidden cracks, so treatments that keep working for a while are more useful than a quick knockdown. We pair the treatment with advice on damp, ventilation and storage, because changing the conditions is what stops them coming back.
- Confirm and identify
We confirm it is fishmoths and not booklice or another small insect, which need different handling.
- Find where they live
The technician checks the roof space, cupboards, bookshelves, bathrooms and stored boxes for the main population.
- Check for damp
We look for leaks, poor ventilation and damp walls, because fishmoths follow moisture.
- Treat voids and cracks
Dust goes into the roof space and voids, and residual products into cracks, skirtings and cupboard corners.
- Report and remedial advice
You get a post-treatment report covering what we treated and what to change in storage and ventilation.
Keeping them out afterwards
- Seal cracks around skirting boards, cornices and built-in cupboards where they hide and lay eggs.
- Improve ventilation in bathrooms and laundries with an extractor fan or by keeping a window open after showers.
- Fix leaks under basins, around geysers and in the roof, since fishmoths need moisture.
- Avoid stacking old newspapers, magazines and cardboard boxes in cupboards for long periods.
- Vacuum regularly inside cupboards, along skirting boards and behind furniture to remove eggs and food sources.
Pricing, honestly
The price depends on the size of the property, how many rooms and cupboards are affected, and whether the roof space needs to be treated. Easy access to the ceiling void keeps the job simpler, while a home with lots of built-in cupboards and shelves takes more time. Offices, archives and storerooms with large amounts of paper are quoted separately, and every quote is free.
Moving books into sealed boxes and running a dehumidifier will help more than any spray from the shop. DIY sprays rarely reach the roof space or wall voids where the main population lives. If you are seeing them in several rooms or dropping from the ceiling, get the roof space treated professionally.
Frequently asked questions
Why are fishmoths in my Plumstead cupboards?
Damp from the under-floor void keeps cupboards humid. Better ventilation and treatment helps.
Are fishmoths and silverfish the same thing?
Yes. Fishmoth is the common South African name for silverfish, and it covers a few related species, including the grey silverfish common in Cape Town.
Why are fishmoths falling from my ceiling?
That usually means there is a population in the roof space. Treating the ceiling void with a dust is the most effective way to deal with it.
Do fishmoths mean I have damp?
Often, yes. Common silverfish in particular need high humidity, so seeing them regularly in one room is a good reason to check for leaks or poor ventilation.
Can fishmoths damage clothes?
They can graze cotton, linen, silk and starched fabrics, particularly items stored for long periods in damp cupboards. They are less of a problem on synthetics.
Do fishmoths bite?
No, they do not bite people or pets and do not carry disease. The problem is the damage they do to paper, books, photographs and fabrics.
Office 021 012 5825 · WhatsApp us
