PERTHTimber pest inspections in Perth: it is not just termites
A timber pest inspection covers three things, not one: subterranean termites, wood borers, and fungal decay. What each does to a Perth house and how they differ.
When people book a timber pest inspection, almost everyone is thinking about termites. Termites are the headline act, and fairly so — they do the most damage the fastest, and a bad infestation can cost more than any other single defect in a house. But a timber pest inspection to Australian Standard AS 4349.3 covers three separate things, not one, and the other two are quietly responsible for a lot of the timber damage we find in Perth homes. If you only worry about termites, you are watching one door of three. The other two are open too.
The three timber pests
The standard groups timber pests into three categories: subterranean termites, wood-boring insects, and wood-decay fungi. They damage timber in different ways, they leave different evidence, and they are drawn by different conditions. A proper inspection looks for all three, and just as importantly for the conditions that invite them, because finding conducive conditions early is how you avoid the damage in the first place.
Subterranean termites
These earn the reputation. Subterranean termites live in a nest, usually in the ground, and travel to their food — the timber in your house — through mud tubes they build to stay hidden and humid. Perth sits in one of the higher termite-pressure regions in the country, and the damage can be severe because they eat timber from the inside out, leaving a paper-thin surface that looks intact until you press on it. The evidence an inspector looks for is the mud tubes themselves, the tell-tale hollow sound when timber is tapped, surface blistering, and the conditions termites love: timber in contact with soil, poor subfloor ventilation, moisture against the structure, and garden beds banked up against the walls.
Because they work hidden, termites reward a careful inspection and punish a rushed one. This is where the conditions matter as much as the evidence — a house with no current termites but with timber touching soil and a damp subfloor is a house at risk, and a good report says so rather than just ticking "none seen today."
Wood borers
Borers are wood-boring beetles whose larvae tunnel through timber, and the sign most people recognise is the scatter of tiny round exit holes, sometimes with a fine powder — frass — beneath them. In Australian homes the ones that matter most are the borers that attack seasoned timber, and they tend to show up in older flooring, skirtings, furniture and roof timbers. Not every borer hole is an active problem — many are old damage from an infestation that has run its course — and part of the inspector's job is distinguishing active borer activity, which needs action, from historic holes that are simply a record of the past. The distinction changes what you do about it entirely.
Wood-decay fungi
The third pest is not an insect. It is a fungus. Wood-decay fungi break down the structure of timber wherever there is enough moisture for them to grow, and they are the reason a persistently damp piece of timber goes soft, dark and crumbling. This is what people loosely call "rot." It needs moisture to survive, so it turns up exactly where water is a problem: a subfloor that does not drain or ventilate, a wet area where the waterproofing has failed, a leak that has been quietly feeding a wall or a windowsill for years. Left alone in the right conditions it will destroy structural timber as surely as any insect.
Because fungal decay follows moisture, it often travels with the other problems an inspection finds. The leaking shower that shows up on the moisture meter, the subfloor with no cross-flow ventilation, the downpipe discharging against the wall — these are the conditions that feed decay, and an inspection that finds the moisture problem has usually found the decay risk with it.
Why the distinction matters to you
The three pests call for different responses. Termites are an urgent, specialist problem with a management-and-treatment path of their own. Borers may need treatment or may just need monitoring, depending on whether they are active. Fungal decay is fundamentally a moisture problem — fix the water and you starve the fungus — so the answer is often a drainage or ventilation repair rather than a pesticide. Lumping all three under "termites" leads people to spend on the wrong fix, or to relax because "there were no termites" while decay quietly continues in a damp subfloor.
That is the case for treating a timber pest inspection as its own scope, done properly, rather than an afterthought to the building inspection. The two are separate standards — AS 4349.1 for the building, AS 4349.3 for timber pests — and while they are usually carried out in the one visit, each is looking for different things. If you want the detail on how termites are managed under the relevant standard, our guide on termite management standards covers it, and the guide on timber decay goes deeper on the fungal side. The short version: three doors, not one, and a good inspection watches all of them.
Common questions
What does a timber pest inspection cover?
Three groups of timber pest, not one: subterranean termites, wood-boring insects (borers), and wood-decay fungi. A timber pest inspection to AS 4349.3 looks for evidence of all three, plus the conditions that make them likely, across the accessible parts of the property.
Are termites the only timber pest in Perth?
No. Subterranean termites get the attention because they do the most damage fastest, but wood borers and fungal decay also affect Perth homes, particularly where there is moisture — poor subfloor ventilation, a persistent leak, or damp built into a wet area. A good inspection looks for all three.
What is the difference between a building and a timber pest inspection?
A building inspection assesses the condition and defects of the structure and finishes to AS 4349.1. A timber pest inspection specifically looks for termites, borers and decay to AS 4349.3. They are separate scopes, often done in the one visit, and each reports to its own standard.
Where to go next
If you want the service pages behind this, see our building & timber pest inspection, pre-purchase building inspection. The technical detail lives in our guides on termite management standards, timber decay structural defect. Related reading: What a pre-purchase building inspection actually covers in Perth, Thermal imaging in a building inspection: what it can and cannot see.