St James is a narrow strip of grand old houses squeezed between the mountain and False Bay, best known for its colourful bathing boxes and tidal pool. With the mountain right behind and the sea in front, homes deal with damp, wind and wildlife all year.
St James: what drives crawling insects here
Fishmoths love damp cupboards and libraries in old houses, and spiders shelter in rockeries and walls. Ants trail in during dry weather.
Many homes are large Edwardian and Victorian houses on steep plots, with timber floors, wooden verandas and big roof spaces. There are also flats and newer homes higher up the slope. Steep sites, terraced gardens and stone retaining walls give rodents and spiders lots of hiding places. Old timber and damp sea air create ideal conditions for fishmoths and wood borer.
The suburb sits at the foot of the mountain in Table Mountain National Park, with the Main Road and railway line running along the coast. Sea spray, damp winters and the South-Easter in summer all play a part. Wildlife from the mountain, including baboons and rodents, comes right down to the gardens.
What gives them away
- Yellowish stains or tiny pepper-like droppings are left on paper and shelves.
- Fishmoths drop from the ceiling or come out of light fittings and cornices, a sign they are living in the roof space.
- Shed scales and skins collect in drawers, cupboards and bathroom corners.
- Silvery, fast-moving insects are seen when you lift boxes, books or linen.
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.
Worth knowing
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.
Our process, step by step
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
- Fix leaks under basins, around geysers and in the roof, since fishmoths need moisture.
- Vacuum regularly inside cupboards, along skirting boards and behind furniture to remove eggs and food sources.
- Seal cracks around skirting boards, cornices and built-in cupboards where they hide and lay eggs.
- Store books, documents and photographs in sealed plastic boxes, not cardboard, especially in garages and storerooms.
- Avoid stacking old newspapers, magazines and cardboard boxes in cupboards for long periods.
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.
Fishmoths are active all year because they live indoors, but Cape Town's damp winters make them more noticeable as moisture rises in roofs, walls and cupboards. Grey silverfish in the roof space may become more visible in summer when the ceiling heats up and pushes them down into the rooms below.
Fishmoth Control questions from St James
Why do I have so many fishmoths in my St James house?
Sea air and mountain damp keep old houses humid, and fishmoths love that. Drying out cupboards and a targeted treatment brings numbers down.
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 inspect my old St James home for wood borer before I sell?
Yes, we inspect floors, roof timbers and verandas and give you a written report. Many sales need a beetle certificate, so book early.
How long does a fishmoth treatment last?
Our treatments carry a minimum 3-month guarantee. Fixing damp and changing storage habits makes the result last much longer.
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 you come out to St James for fishmoth control?
Yes. St James is part of our regular South Peninsula route, along with Muizenberg, Kalk Bay, Lakeside. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
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