Ask anyone in Kirstenhof about pests and mosquitoes will come up first, thanks to the Westlake wetlands just down the road. After that it is roof rats, Argentine ants and paper wasps, which is pretty much the standard package for a green, garden-heavy suburb.
Kirstenhof: what drives crawling insects here
Argentine ants trail through kitchens in summer, and crickets and rain spiders come in from the garden. American cockroaches use the drains.
Homes are mostly single-storey family houses and some townhouse complexes, built from the 1960s onwards, with gardens, pools and often thatched lapas. Many have big trees and shrubbery close to the walls. Thatch, timber decks and dense planting give pests places to hide.
The Westlake River and wetland system runs nearby, draining towards Zandvlei, and Tokai forest and the Steenberg mountains are just up the road. Winter rain is heavy and the wetlands fill up. Damp ground, reeds and standing water make it a natural mosquito and rodent area.
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 to tell you have a problem
- Shed scales and skins collect in drawers, cupboards and bathroom corners.
- Clothing, curtains or linen made from cotton, linen or silk have small holes or thinned patches.
- Wallpaper is lifting or damaged along the edges where the glue has been eaten.
- Silvery, fast-moving insects are seen when you lift boxes, books or linen.
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.
Stopping a repeat visit
- Improve ventilation in bathrooms and laundries with an extractor fan or by keeping a window open after showers.
- 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.
- 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.
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.
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.
Questions we get asked in Kirstenhof
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.
Do you come out to Kirstenhof for fishmoth control?
Yes. Kirstenhof is part of our regular Southern Suburbs route, along with Tokai, Heathfield, Steenberg, Lakeside. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
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.
Are the mosquitoes in Kirstenhof worse because of the wetlands?
Yes, the Westlake wetlands provide breeding sites, especially after winter rains. Removing standing water at home and treating resting sites in the garden reduces bites.
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 Egyptian geese cause problems in Kirstenhof gardens?
They can foul lawns and pool areas and be aggressive when nesting. Bird deterrents and changing what attracts them to your garden can help.
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