Hout Bay is a valley town with a working harbour at one end and horse paddocks and leafy plots further up. Fishing boats, stables, a river and mountain on three sides make for a wider mix of pests than most Atlantic Seaboard suburbs.
Crawling insects around Hout Bay
American cockroaches come up through drains near the harbour, and German cockroaches live in restaurant kitchens. Scorpions and rain spiders are common in valley gardens.
Housing ranges from big family homes on large plots in the upper valley, to townhouse complexes, holiday homes near the beach and older cottages closer to the harbour. Many homes have thatched lapas, timber decks and outbuildings. Stables, workshops and harbour-side warehouses and fish processing buildings carry their own rodent and fly problems.
Rats around the harbour and along the river, flies near stables, and mosquitoes near the river and wetland areas are typical. Wasps, scorpions and spiders come with the mountain and garden setting. Cockroaches are more common in the harbour precinct and restaurants.
Signs to look for
- Fishmoths drop from the ceiling or come out of light fittings and cornices, a sign they are living in the roof space.
- Clothing, curtains or linen made from cotton, linen or silk have small holes or thinned patches.
- Yellowish stains or tiny pepper-like droppings are left on paper and shelves.
- Wallpaper is lifting or damaged along the edges where the glue has been eaten.
- Irregular grazed patches or small holes appear on book covers, wallpaper or photographs.
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.
When a technician deals with fishmoths, the first place they look is up. The roof space is often where the main population lives, out of sight, especially with the grey silverfish common in Cape Town.
How we handle fishmoth control in Hout Bay
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
- Improve ventilation in bathrooms and laundries with an extractor fan or by keeping a window open after showers.
- Store books, documents and photographs in sealed plastic boxes, not cardboard, especially in garages and storerooms.
- 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.
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.
Questions we get asked in Hout Bay
Do you come out to Hout Bay for fishmoth control?
Yes. Hout Bay is part of our regular City Bowl & Atlantic Seaboard route, along with Imizamo Yethu, Llandudno, Constantia, Camps Bay. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
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.
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.
Can you check a thatched lapa in Hout Bay for borer?
Yes. We inspect the thatch poles and timber for borer activity and can treat if needed, and we can include it in a beetle certificate inspection when you sell.
Why are there so many flies in Hout Bay in summer?
The stables, paddocks and harbour all give flies breeding material, and warm summer weather speeds that up. Removing manure and fish waste quickly, plus fly control around the stables, makes a big difference.
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