Delft is one of Cape Town's more densely built areas, with families living close together and many extra rooms built onto the back of houses. Most calls here are about rats, cockroaches and fleas, and the best results come from treating a few neighbouring homes together.
Crawling insects around Delft
German cockroaches settle in kitchens and move through shared walls, and ants are common in sandy yards. Fishmoths show up where clothes and boxes are stored.
Housing is mostly government-built family homes on small plots, many extended with backyard rooms, wendy houses and informal structures. Homes stand close together, and extensions built with corrugated sheeting often leave gaps at the roofline. More people and more food in a small space gives pests plenty to work with. Spaza shops run from homes add stock rooms to the picture.
Rats are the main concern, feeding on waste and burrowing under structures in the soft sand. Cockroaches spread easily through shared walls and kitchens. Fleas with dogs and cats are a regular problem, and flies peak around bins and dumping spots in summer.
Something most people miss
Landlords with older rental properties often get fishmoth complaints from tenants. A roof void treatment and better ventilation in the bathroom usually solves it for the long term.
What gives them away
- Fishmoths drop from the ceiling or come out of light fittings and cornices, a sign they are living in the roof space.
- Irregular grazed patches or small holes appear on book covers, wallpaper or photographs.
- Wallpaper is lifting or damaged along the edges where the glue has been eaten.
- Yellowish stains or tiny pepper-like droppings are left on paper and shelves.
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.
How the treatment works
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.
Want the full step-by-step? See how our fishmoth control service works.
Prevention that actually works
- Seal cracks around skirting boards, cornices and built-in cupboards where they hide and lay eggs.
- Fix leaks under basins, around geysers and in the roof, since fishmoths need moisture.
- Improve ventilation in bathrooms and laundries with an extractor fan or by keeping a window open after showers.
- Vacuum regularly inside cupboards, along skirting boards and behind furniture to remove eggs and food sources.
- Store books, documents and photographs in sealed plastic boxes, not cardboard, especially in garages and storerooms.
How much will it cost?
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
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.
Do you come out to Delft for fishmoth control?
Yes. Delft is part of our regular Cape Flats route, along with Belhar, Bishop Lavis, Kuils River, Nyanga. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
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.
Can you treat my whole row of houses in Delft for rats at once?
Yes, and it works better that way. Send us the addresses and we will give a free quote for treating the properties together.
My children are getting bites at night in Delft. Is it fleas or bed bugs?
Bites around the ankles usually point to fleas, while rows of bites on arms, neck or back point to bed bugs. WhatsApp us a photo of any insect you find and we will help identify it.
Office 021 012 5825 · WhatsApp 074 697 2254