Termite Damage: What to Look For

The hardest thing about termites is that they hide their work. They eat timber from the inside out and shun the light, so by the time obvious damage appears, a lot can be going on behind the scenes. Learning to read the subtle clues below means you can catch a problem early, when it is far cheaper and easier to deal with. Before we start, one rule matters above all the others.

1 Mud Tubes

Mud tubes, also called mud leads, are one of the clearest signs of subterranean termites, the type most common in Sydney. They are thin tunnels of mud, about the width of a pencil, that termites build to travel between the soil and your home's timber while staying protected and moist. Look for them running up brick walls, foundations, piers and in the subfloor.

You might see them as pencil-thin lines snaking up a surface, or as patches where mud has been packed into a gap. They are the termite equivalent of a covered walkway, and finding them means termites are actively moving through. Resist the urge to break one open to check, as that simply tells the colony it has been discovered.

2 Hollow-Sounding Timber

Because termites eat timber from the inside, they often leave just a thin layer on the surface, so the wood can look completely normal while being largely hollow within. The classic test is sound: tapping affected timber gives a hollow, papery or drummy sound rather than the solid thud of healthy wood.

Pay attention to skirting boards, door and window frames, architraves, floors, decks and any structural timber you can reach. The surface may also look slightly rippled, blistered or sunken where termites have eaten just below it. If a section sounds noticeably different to the timber around it, that is worth taking seriously.

3 Frass and Droppings

Frass is termite droppings, and it is worth understanding because it can be confusing. Drywood termites push their droppings out of small holes in the timber, leaving little piles of tiny, timber-coloured pellets that look a bit like sawdust or coarse coffee grounds, often beneath the affected wood.

Here is the important part for Sydney homes: the subterranean termites that cause most of the damage here generally do not leave visible frass, because they reuse it within their mud workings. So while finding frass is a clear warning sign, not finding any does not mean you are in the clear. The absence of frass is no proof there are no termites, which is exactly why the other signs and regular inspections matter so much.

4 Discarded Wings

At certain times of year, usually in the warmer months, a mature colony releases winged reproductive termites that fly off to start new colonies. After this flight they shed their wings, and those discarded wings are a telling sign.

Look for small piles of identical, translucent wings on windowsills, near light fittings, in spider webs and around the home, often after a warm, humid evening. A scattering of shed wings suggests a colony is established nearby and actively spreading, and it is a strong prompt to arrange an inspection.

5 Damaged or Bubbling Paint

Termite activity behind a surface often shows up in the paint and plaster. Because termites bring moisture with them and eat the material just beneath, the surface can react in ways that are easy to mistake for water damage:

• Paint that bubbles, blisters or peels for no obvious reason
• Cracked, rippled or uneven wall surfaces
• Plasterboard that sags, dimples or sounds hollow
• Tiny pin-sized holes in walls or skirtings
• Areas that feel damp or look discoloured

Because these signs mimic ordinary wear, water damage or age, they are easy to dismiss. If you cannot explain why paint is blistering or a wall is rippling, it is worth ruling out termites rather than assuming the worst is just cosmetic.

How Quickly Does Termite Damage Happen?

A common assumption is that termite damage takes decades to matter, but a large, established colony can do significant harm to a home in a matter of months to a few years rather than over a lifetime. The exact speed depends on the species, the size of the colony and how much accessible timber there is, but thousands of workers feeding around the clock add up faster than most people expect.

That is precisely why the early signs in this guide are so valuable. The difference between catching termites in the first months and finding them after several years is often the difference between a straightforward treatment and a major repair bill. With termites, time genuinely is money.

Can Termite Damage Be Repaired?

Yes, in most cases it can, but the order of events matters. The termites themselves must be dealt with first, because repairing or replacing timber while a colony is still active simply gives them fresh material to eat. Once the colony has been treated and the home protected, damaged timber can be assessed and repaired.

How extensive that repair is depends entirely on how far the damage has progressed, which loops back to early detection. Minor damage caught quickly may need little more than some timber replaced, while years of unchecked activity can mean structural work. A professional will advise on what needs attention once the termites are no longer a threat.

What to Do If You Find Damage

If you spot any of these signs, the steps are simple. Do not disturb the termites or the damage, note where you saw it, and arrange a professional inspection. A timber pest inspection will confirm whether termites are active, how far they have spread, and what needs to happen next, using tools and training you cannot replicate at home. From there, our termite control page explains how the problem is treated properly.

Termite damage is serious, but it rewards a sharp eye. Learn to recognise mud tubes, hollow timber, frass, discarded wings and suspicious paint, remember that no single sign tells the whole story, and never disturb termites if you find them. Catch the clues early, get a professional inspection, and you can stop a small problem long before it becomes a structural one.