Signs of a Termite Infestation in Your Sydney Home

The four signs worth knowing are mud tubes running up walls and piers, timber that sounds hollow when tapped, discarded wings scattered near windows after a warm night, and paint that bubbles or ripples as if damp sits behind it. Any one of these means termites are likely active nearby, and finding them early is the difference between a straightforward treatment and repairing structural timber.

Because subterranean termites work hidden inside timber and soil, they rarely announce themselves. The signs below are the small clues they leave at the edges, what each one tells you, and where on a Sydney home to look first. If you find something that matches, our guide to getting rid of termites explains what happens next, but do not disturb the activity in the meantime.

Termites give themselves away in a handful of distinct ways. Here is what each sign looks like and, just as importantly, what it means for how far the problem has progressed.

If you want to check your own home before booking a professional, walk it in the order termites use, from the ground up. Start at the subfloor, the highest-risk zone in a Sydney home, and look along piers, foundation walls and bearers for mud tubes and any timber sitting against soil. A torch held at a low angle across a wall makes tubes and shadows far easier to spot.

Move to the wall cavities and interior, tapping skirtings, architraves and door frames for that hollow note, and checking windowsills for shed wings and skirting lines for rippled paint. Then check the roof timbers, since some activity travels up internal walls into the roof void, where mud leads and blistered timber can show on rafters and battens. Finally walk the garden timbers, fences, retaining sleepers, stored firewood and old stumps, which are common first footholds before termites reach the house.

A homeowner check is worth doing, but it has limits. Termites hide their most active workings in exactly the places that are hardest to reach and easiest to disturb, so a clear look from the yard does not mean a clear home. Treat your walkthrough as a prompt to book a professional inspection rather than a substitute for one.

Not every sign means the same level of trouble, and reading the severity helps you understand the urgency. A light or early infestation tends to show as a single mud tube on a pier, shed wings from a recent swarm, or one small patch of hollow skirting, with activity still confined to one area and no widespread damage. Caught here, treatment is usually straightforward and the timber is often still sound.

An established infestation shows several signs at once: multiple mud tubes, hollow timber across more than one room, blistered paint along several skirting lines, and perhaps doors sticking on different sides of the house. This pattern means the colony has been feeding for a while and has spread through the structure, so treatment is more involved and some timber may need replacing. The colony itself is still treatable, but the damage bill grows the longer it runs.

You cannot reliably judge severity from the surface, because the visible signs sit at the edge of a much larger hidden network. Even a single mud tube can lead to extensive galleries out of sight. So use these markers to gauge urgency, not to decide against treatment, and let a licensed inspection measure the true extent.

The most important thing to do when you find termites is nothing sudden. Do not break open mud tubes, spray the workings, or knock apart damaged timber to see how bad it is. Disturbed subterranean termites abandon that gallery and relocate elsewhere in the building, which spreads the damage and makes them far harder to treat. Leave what you found exactly as it is and note where it is.

Resist the DIY spray in particular. A retail can kills a few workers and, worse, can teach a repelled colony to route around the treated area, so the sightings stop while the eating continues out of view. The next step that actually helps is a professional inspection to confirm the species and map the activity, followed by a matched treatment. Our termite control service handles both, and our cost guide sets out what treatment typically runs.

In short: keep the activity undisturbed, keep the spray can in the cupboard, and get a licensed technician to look before anything is touched. Everything after that goes more smoothly, and the earlier you make that call, the less timber the colony takes with it.