Kuils River Thatch Treatment

Kuils River sits on the eastern side of the northern suburbs, where the suburbs start giving way to the Bottelary Hills and wine country. The river the town is named after runs right through it, and that green strip of reeds and grass shapes a lot of what we see on call-outs here.

Kuils River: what drives timber pests here

Older houses with pine roof trusses and timber floors can carry wood borer, and it is worth getting an inspection before you buy. We can do the beetle inspection a transfer often needs.

Most homes are free-standing family houses on decent stands, from older brick bungalows to newer complexes and gated estates on the edges of town. Plenty of properties have outside rooms, garages and Wendy houses that get used for storage, which is exactly where mice settle in. Townhouse complexes share roof voids along a block, so one unit's problem tends to become the neighbours' problem too.

Rats and mice are the big ones, especially in homes backing onto the river or open ground. Ants come in strong waves in summer, and German cockroaches are common in complexes where kitchens back onto each other. Mosquitoes breed in the slower stretches of the river after the winter rains.

From the technician

For holiday rentals and lodges, insects falling from an open thatch ceiling are the kind of thing guests photograph. An annual check before the busy season is cheap insurance.

Borer damage in thatch is often blamed on the reed, but the reed is rarely the problem. It is the poles and laths holding it up that the beetles are after.

Tell-tale signs

1. Fine powder dropping from the poles or laths onto floors and furniture below.
2. Small round exit holes in the poles, especially in the paler sapwood.
3. Rustling or scratching in the roof at night.
4. Droppings on beams or along the top of walls under the thatch.
5. Insects such as cockroaches or spiders falling from the ceiling.
6. Birds pulling reed out of the roof or nesting under the eaves.

What happens when we come out

We start by inspecting the underside of the roof, the poles, the laths and the eaves, looking for borer exit holes, frass and rodent or bird activity. Affected poles and laths are treated with a borer spray or injection designed for timber, applied to the wood rather than soaked through the thatch. For insects living in the thatch, we use a targeted residual treatment on the underside, keeping it as light as will do the job. Rodents are handled with traps and tamper-resistant bait stations placed at wall plates and entry points, and we advise on bird netting or proofing at the eaves. Fire safety of the thatch itself, such as retardant treatment, is a separate specialist job and we will tell you if it looks overdue.

1. Roof inspection

   We look at the underside of the thatch, every accessible pole and lath, and the eaves and ridge.

2. Identify the problem

   We separate active borer from old damage and confirm which insects, rodents or birds are involved.

3. Timber treatment

   Affected poles and laths are treated with borer spray or injection.

4. Thatch and pest treatment

   Insects in the thatch are treated from below and rodent stations or traps are placed.

5. Report and recommendations

   You get a report noting what was treated and any timber that a thatcher or builder should replace.

Prevention that actually works

• Ask your thatcher to check the poles and laths for borer whenever the roof is being repaired or re-combed.
• Fit bird netting or wire at the eaves if birds keep pulling reed or nesting there.
• Do not store firewood or boxes against the walls under the thatch, as they give insects and rodents cover.
• Have open thatch ceilings in lapas and lodges checked once a year, since problems are easy to see early.
• Keep trees and creepers trimmed back from the thatch so rodents cannot step straight onto the roof.

Pricing, honestly

The price depends on the size of the roof, how much of the structure is exposed and how many poles and laths show borer activity. A small lapa with an open underside is a very different job from a double-storey home with a closed ceiling. Rodent and bird work is added where needed, and timber that is too damaged to treat has to be replaced by a builder or thatcher.

Spraying the underside of your own thatch with a garden insecticide does very little for borer, which lives inside the poles, and soaking thatch in products not meant for it can do more harm than good. We would leave borer and rodent work in thatch to someone who does it regularly. Keeping the roof clear of overhanging trees is the one thing every owner can do themselves.

Frequently asked questions

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