A small pile of what looks like sawdust beneath a timber door frame can be easy to sweep away and forget. But when that material is drywood termite frass, it may be the first visible warning that termites are feeding inside your timber. Knowing the signs of drywood termites gives you the chance to act before hidden damage becomes a costly repair.

Unlike termites that travel through soil, drywood termites live inside dry timber. They can establish colonies in roof structures, built-in cabinetry, wooden doors, skirting boards, furniture and other untreated or vulnerable timber items. Because they stay within the wood they consume, an infestation may remain out of sight for a long time.

1. Small piles of dry, pellet-like droppings

The most recognisable sign is frass – tiny, hard, oval pellets pushed out of the colony through small exit holes. Drywood termites keep their galleries clean, so they periodically eject waste from the timber rather than leaving it inside.

Frass often collects on window ledges, floors, shelves or beneath wooden furniture. It may resemble fine sawdust at first glance, but the pellets are usually uniform in shape and feel gritty rather than fibrous. Their colour can range from pale beige to dark brown, depending on the timber being eaten.

Do not assume every pile of wood dust is termite activity. Powderpost beetles, carpenter ants and ordinary wear can leave similar-looking debris. A professional inspection can identify the source and determine whether the activity is current.

2. Tiny holes in timber surfaces

Look closely at timber where pellets have appeared. Drywood termites create small kick-out holes, often about the size of a pinhead, to remove frass from their galleries. These holes may be scattered across a door frame, wooden beam, cupboard, parquet flooring or piece of furniture.

The openings can be difficult to spot because termites may seal them after clearing waste. Fresh frass below a surface is therefore more useful than a hole alone. Avoid poking, spraying or sealing suspected holes yourself. This can disturb the colony, conceal evidence and make a proper assessment more difficult.

3. Hollow-sounding or damaged wood

Drywood termites feed along the grain of timber and leave a network of smooth internal tunnels. The outside surface can appear intact even when significant material has been removed beneath it.

Tap gently on a suspected area and compare its sound with nearby solid timber. A hollow or papery sound, slight flexing, blistered paint or a surface that breaks easily can indicate internal damage. Doors may become loose at the frame, cabinetry may feel weakened, and timber fittings may show unexplained cracks.

These symptoms are not exclusive to termites. Moisture damage, fungal decay and ageing materials can also weaken wood. The difference matters because each problem requires a different treatment plan.

4. Discarded wings near windows or lights

Flying reproductive termites, often called swarmers or alates, leave the colony to establish new ones. After landing, they shed their wings. Finding several matching wings near windows, balcony doors, light fittings or vents can be a warning that termites are active nearby.

Drywood termite swarmers are commonly attracted to light and may be seen after warm, humid conditions. In Singapore, where humidity can support termite activity throughout the year, do not wait for a particular season before arranging an inspection.

Termites and flying ants are regularly confused. Termites have straight antennae, a broad waist and four wings of similar length. Flying ants have elbowed antennae, a narrow waist and front wings that are noticeably longer than their rear wings. If you have collected a specimen, keep it in a small sealed container for identification rather than discarding it.

5. A brief appearance of winged insects indoors

One or two flying insects indoors do not automatically mean there is a colony in the building. However, a sudden group emerging from a timber feature, especially around a window frame, ceiling beam or wooden cabinet, needs prompt attention.

A swarm may last only minutes, so many people miss it. You may instead notice wings left behind on the floor or sill. Make a note of the location and time, and take clear photographs if possible. This helps a technician focus the inspection on likely areas of activity.

6. Faint clicking from inside timber

In a quiet room, large or disturbed colonies can sometimes produce faint tapping or clicking sounds within timber. Worker and soldier termites may create vibrations when feeding or signalling danger. This is not a dependable diagnostic sign on its own, but it becomes more meaningful when paired with frass, holes or visible timber damage.

Do not rely on listening tests to rule termites out. Most infestations are silent to the human ear, particularly when they are small or located deep within a wall, roof void or concealed joinery.

7. Damage to furniture, doors and roof timber without soil contact

Drywood termites do not need contact with the ground. That is a key difference from subterranean termites and one reason infestations can occur in upper floors, roof trusses, wooden fixtures and freestanding furniture.

Check rarely moved items as part of your routine property care. The underside of antique furniture, the back of cabinets, stored timber, false ceilings and inaccessible roof areas can all provide concealed entry points. A single infested piece of furniture can also introduce termites into a property, though the extent of spread depends on the colony and the available timber.

What to do when you spot signs of drywood termites

The priority is to confirm the pest and map the extent of the problem. A visible pile of frass does not show how far galleries run, whether multiple colonies are present or whether other wood-destroying pests are involved.

Start by preserving the evidence. Photograph pellets, wings, holes and affected timber before cleaning. If practical, place a small sample of pellets or insects in a sealed bag or container. Then avoid moving the affected furniture or dismantling timber until it has been assessed. Relocating an infested item can spread insects or make the original source harder to trace.

A qualified termite technician should inspect accessible timber, surrounding structural elements and likely entry or emergence points. Depending on the property and signs present, the inspection may involve moisture checks, close visual assessment, sounding of timber and thermal imaging to identify areas that require further investigation. Thermal imaging can support an inspection, but it is not a substitute for physical verification because temperature changes can have several causes.

Why treatment must match the termite species

There is no one-size-fits-all termite treatment. Drywood termites live within the timber they infest, so treatment may involve targeted applications to affected wood, localised removal or replacement of severely damaged materials, or whole-structure solutions where widespread activity is confirmed. The right approach depends on the species, colony locations, construction type, level of damage and whether occupants can remain in the property during treatment.

For a family home, safety, access and disruption are often major considerations. For hotels, food premises, offices, pharmaceutical facilities or marine environments, treatment planning must also account for operational standards, sensitive areas and documented follow-up. A professional Integrated Pest Management approach focuses on diagnosis first, then targeted control, monitoring and practical prevention rather than treating every timber surface without evidence.

Preventing another drywood termite problem

Prevention cannot guarantee that termites will never appear, particularly in a humid climate, but it can reduce opportunities for infestation. Keep timber dry and well maintained, repair leaks promptly, and avoid storing untreated wood against or inside the building for long periods. Check second-hand wooden furniture before bringing it indoors, particularly if it has unexplained holes, pellets or weakened sections.

Regular inspections are particularly worthwhile for older properties, buildings with substantial timber finishes, and premises where early detection protects valuable fittings or business continuity. If one area has been treated, follow-up checks help confirm that the activity has stopped and that nearby timber remains sound.

If you have found frass, shed wings or suspicious timber damage, early assessment is the practical next step. Ezzy Pest Management can identify the pest, explain the treatment options clearly and help protect your property with a targeted, sustainable plan.