A Woodstock homeowner requested a pre-sale pest inspection before listing a 1960s semi-detached property. Verminator found active wood borer in floor joists and 3 interior floorboards. Structural injection treatment completed, beetle certificate issued, and property transfer proceeded on schedule.
The vendor of a 1960s semi-detached home in Woodstock requested a pre-sale pest inspection 8 weeks before the planned listing date. The property had original pine floorboards throughout the rear rooms and exposed pine floor joists visible from the sub-floor cavity. The vendor wanted to know whether a beetle certificate would be required — and if so, whether any treatment would be needed before it could be issued.
Sub-floor inspection found active common furniture beetle (woodworm) in floor joists at 2 locations: frass in bore tunnels, live larval activity confirmed. Interior inspection found exit holes and fresh frass in 3 rear bedroom floorboards. Full structural injection treatment to all accessible joists and affected flooring. 14-day re-inspection confirmed no new exit hole activity. Beetle certificate issued. Written treatment report provided for bond attorneys and buyer disclosure.
Full property inspection including sub-floor access via the external hatch at the rear of the property. Sub-floor cavity had approximately 600mm clearance — adequate for a full survey of the floor joist structure. Active common furniture beetle (Anobium punctatum) found in 2 joist sections in the rear third of the sub-floor: fresh frass (fine, bun-shaped pellets) in bore tunnel exits, and one larval specimen recovered from a split in the outer joist face. The frass colour and texture confirmed recent activity — not historical. Interior inspection of the rear bedroom revealed 4 exit holes in 3 adjacent floorboards, with fresh frass beneath the board surface visible through a gap at the skirting board junction. No evidence of wood borer in the front rooms, hallway, or roof structure.
Injection treatment applied to all accessible floor joists via sub-floor access, concentrating on the two sections with confirmed active infestation and extending preventatively to all joists within 1.5m of the active zones. Interior boards: injection to the 3 affected boards through drilled injection points at 300mm centres, sealed after treatment. Adjacent boards either side of the 3 affected treated preventatively. Treatment product: registered structural timber insecticide for common furniture beetle. Application documented for certificate and bond disclosure purposes. Sub-floor required to dry adequately before closing: 4-hour ventilation window after treatment.
Return inspection 14 days post-treatment. Sub-floor: no new exit holes or fresh frass in treated joist sections. Interior boards: no new exit hole activity at injection points or adjacent areas. The 14-day window is used to confirm no adult beetle emergence, which would indicate active larvae surviving the injection application. No such activity found. Structural integrity of all treated timber assessed: no tunnelling compromising structural bearing capacity. Certificate assessment: infestation was active but confined to non-structural boarding and non-critical joist sections. Treatment complete and adequate for certificate purposes.
Beetle certificate (Wood Borer Certificate of Compliance) issued for the property. Certificate documents: treatment method, products used, areas treated, date of treatment, 2-year guarantee scope (re-infestation in treated zones), and confirmation that the property is free of active wood borer at time of inspection. Written treatment report provided to the vendor for inclusion in the conveyancing file. Bond attorneys confirmed the certificate was in the required form for bond registration. Transfer proceeded on schedule.
Wood borer found during a pre-sale inspection is not a deal-breaker. It is a process: inspect, treat, confirm, certify. The case documented here went from initial inspection to beetle certificate in 16 days. The vendor listed on schedule. The transfer proceeded. The buyer received a property with a documented treatment history and a 2-year guarantee.
The vendor in this case commissioned the inspection 8 weeks before listing — which proved to be the right decision. Eight weeks provided enough time for inspection, treatment, re-inspection, certificate, and still have lead time before the listing date. Vendors who leave pest inspection until after an offer is accepted are working against a conveyancing timeline that does not pause for treatment delays.
In the Western Cape, bond attorneys will typically require a beetle certificate before bond registration can proceed. If active wood borer is found after an offer has been accepted, the treatment-and-certificate process takes 3–4 weeks at minimum. That delay can cause complications with occupation date agreements, rental arrangements, and in some cases result in buyers exercising escape clauses if certificate conditions are not met. A pre-listing inspection eliminates that risk.
The infestation in this property was typical of common furniture beetle (Anobium punctatum) in older Cape Town housing stock. The signs: circular exit holes 1–2mm diameter in the joist and floorboard surfaces, with fine powdery frass (bore dust) either in the tunnel exits or accumulated beneath the timber. The key distinction between active and historical infestation is the frass: fresh frass is cream-coloured and compressible; old frass is discoloured, hardened, and shows no bore pattern at the surface. In this case, the frass was clearly fresh at 2 joist locations and at the rear bedroom floorboard cluster.
Active infestation does not mean structural compromise. The tunnelling in this property was confined to the outer sections of non-critical joists and the surface layer of the floorboards. The structural bearing capacity was not affected. Treatment addressed the infestation; the timber did not require replacement.
Structural injection is the standard treatment for active furniture beetle in floor timber. A registered insecticide formulation is injected into the timber under pressure at the exit holes and through drilled injection points — penetrating the tunnel network where larvae are active. It is more targeted and more reliable than surface spray for embedded larvae: spray cannot penetrate the galleries where the population lives. The sub-floor application was conducted through a full survey crawl of the accessible cavity, ensuring all accessible joist lengths were covered.
The beetle certificate issued for this property documented the treatment date, method, products used, areas treated, and the 2-year guarantee scope. It confirmed the property was free of active wood borer at the date of the post-treatment inspection. This is what bond attorneys and lenders require. The certificate does not guarantee the property can never experience wood borer in future — it certifies that the infestation found was treated, and that treated zones are covered by the guarantee window.
Related: Wood Borer — Constantia Heritage Property | Termite & Wood Borer Inspection | Beetle Certificate Cape Town | Wood Borer Treatment
