Borer

Borer beetles are a widespread problem in New Zealand homes, particularly in older properties with untreated timber. The larvae bore through floorboards, joists, and furniture, weakening the timber over time. Signs of borer include small round exit holes and fine powdery dust (frass) beneath affected timber.

JAE uses specialist penetrating insecticide treatments to eliminate borer larvae.

Borer beetles tunnel through structural and furniture timber, leaving the distinctive small round flight holes that confirm active infestation. Damage often goes unnoticed until it is well advanced, particularly in roof voids, sub-floor framing, and older joinery, so identifying the species and the extent of activity early makes a real difference to the outcome.

JAE inspects affected timber to confirm whether the borer is active and to identify the species — common house borer, two-tooth borer, or others — since each has its own lifecycle and preferred timber. We then apply targeted borer treatments to the affected and at-risk timber, either by spray application, injection, or surface treatment depending on the situation. For roof voids and sub-floors we use specialist equipment to reach every surface.

Because the borer lifecycle runs over multiple years, we recommend regular follow-up inspections to catch any new activity early. Our technician will explain what to watch for between visits and how to reduce moisture and ventilation issues that make timber more attractive to borer.