University Estate Thatch Treatment

University Estate is a small hillside neighbourhood on the lower slopes of Devil's Peak, above Woodstock and next to Walmer Estate. Steep streets and a view over the harbour come with the bush and the old drains that bring rodents and roaches calling.

University Estate: what drives timber pests here

Older semis can have borer in roof timbers, floors and door frames. If you plan to sell, a beetle inspection early on saves a last-minute rush.

Homes are a mix of older semi-detached houses, small freestanding homes and a few newer builds squeezed onto the slope. Many are built close together with shared walls, so a mouse problem rarely stays at one address. Retaining walls, terraced gardens and storage spaces under the house all give pests shelter.

Signs to look for

1. Rustling or scratching in the roof at night.
2. Small round exit holes in the poles, especially in the paler sapwood.
3. Tunnels or loose patches in the thatch where rodents have been moving.
4. Birds pulling reed out of the roof or nesting under the eaves.

Borer in the poles and laths weakens the timbers that carry the weight of the thatch, which is heavy, and serious damage can mean replacing structural members. Rodents nesting in thatch chew electrical cables, and in a thatch roof that is a fire risk to take seriously. Insects dropping from an open thatch ceiling are a nuisance in homes and a real problem in guest lodges and restaurants. Bird nests in thatch can bring mites into bedrooms below.

Something most people miss

If you have a pool or pond next to a lapa, mention it. We plan treatments under thatch so nothing drifts into the water.

Pale, fresh powder means activity; dark, compacted dust in old holes usually means the beetles left long ago. That distinction saves a lot of unnecessary treatment.

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.

Want the full step-by-step? See how our thatch treatment service works.

Stopping a repeat visit

• Ask your thatcher to check the poles and laths for borer whenever the roof is being repaired or re-combed.
• Keep trees and creepers trimmed back from the thatch so rodents cannot step straight onto the roof.
• Have open thatch ceilings in lapas and lodges checked once a year, since problems are easy to see early.
• Do not store firewood or boxes against the walls under the thatch, as they give insects and rodents cover.
• Have electrical wiring in the roof inspected regularly, especially if you have had rodents.

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.

Thatch Treatment questions from University Estate

Thatch Treatment nearby and related