Termite Nest in the House: What It Looks Like, What to Do

A termite nest indoors is usually a light, brown, spongy mass of small connected chambers, made of soil, chewed wood and the termites' secretions and hidden somewhere closed and damp, such as a wall cavity or the void behind a built-in cabinet. Most soil marks on a wall are only routes; the main nest of subterranean termites is normally under the floor or in the soil around the foundations. Leave it as found, photograph it and ask for a survey. Breaking a nest open rarely ends the colony.

What does a termite nest look like?

The nest of subterranean termites is not a solid lump of earth. Exposed, it is a light, porous mass, brown to dark brown, of countless small connected chambers, rather like honeycomb or a sponge dried hard. It is built from soil, chewed wood and the termites' own secretions, and a nest in use is usually damp and smells of musty earth. Drywood termites build no such mass: their nest is the set of hollow galleries inside the timber they are eating.

Most of what gets called a nest on a wall is a mud tube or a thin skin of soil over a feeding place. Scraping it off does nothing to weaken the colony, because the nest is elsewhere. A true nest inside a wall needs a cavity and a source of damp: a double-skin wall, a plasterboard partition, a service shaft or the gap behind a built-in cabinet.

What you see	What it is
Tube-shaped lines of soil on a wall or at the foot of a door	Mud tubes, the closed runways subterranean termites build to move about. A sign of termites, not a nest.
A brown, many-chambered mass in a closed cavity	A subterranean nest. Indoors, high up or far from the ground, it is most likely a satellite nest.
A thin skin of soil over timber or a cardboard box	A cover laid over a feeding place to hold in moisture, usually with workers underneath.
A small heap of dry, loose pellets under furniture	Droppings pushed out of a drywood nest inside the item. There is no nest mass to look for.
Thin wings scattered on a window sill	Left by winged termites leaving a nest. A mature nest is near, but the wings do not say where.

Where is a termite nest usually found?

Subterranean termites choose a nest site on three conditions: it is enclosed, it stays evenly damp and it is close to food. The clues below narrow the search; pinning the nest down takes a surveyor's instruments and experience.

Location	What it is like, and the clues
Under the floor slab, around the foundations	The usual site of the main nest. Clues: mud tubes rising from the joint between floor and wall, termites in several ground-floor rooms at once, floor tiles that sound hollow.
Inside walls and service shafts	Double-skin walls, hollow partitions and ducts with water pipes. Clues: a damp patch with no clear cause, blistered paint, soil pushed out at a socket or crack.
Behind built-in cabinets, under stairs or timber floors	Seldom opened, full of wood and paper. Clues: a bulging cabinet back, sinking floorboards, a musty smell, stored boxes with soil on them.
In the ceiling or roof	Usually a satellite nest fed by a roof leak, an aircon pipe or a water tank. Clues: stained or sagging ceiling boards, soil at the ceiling edge and round recessed lights.
Inside a piece of timber	A drywood nest, wholly within a beam, door frame, handrail or furniture. Clues: pellets that keep falling in one place, hollow-sounding wood with no soil.
In the garden, along the fence	Dead trees, old roots, planters, woodpiles, earth mounds. Clues: mud tubes on a trunk or the boundary wall. A nest here can still send termites indoors.

How does a termite colony work: queen, king, workers and soldiers?

Termites are social insects. They share one nest and divide the work between castes, and no individual survives long away from the rest. When workers or soldiers run short, some of the young develop that way to make up the numbers.

The queen starts as an ordinary winged termite. Her abdomen then grows year by year; in many subterranean species a mature queen is many times the length of a worker and can barely move. She lies with the king in a thick-walled chamber deep in the main nest, so the mud tubes and eaten wood in a house are almost never where she is. She can lay for many years, far longer than a worker lives.

Caste	Its role in the colony
Workers	The most numerous. They find and chew the food, feed the other castes, tend eggs and young, build the nest and lay the mud tubes. Theirs is the damage to timber.
Soldiers	Large-headed, with strong jaws or, in some species, a gland that secretes a sticky substance. They guard entrances and breaches and are fed by workers.
Queen and king	The breeding pair. She lays the eggs that maintain and enlarge the colony; he lives beside her and is much smaller. Workers feed her and carry the eggs away.
Winged termites	The next generation of breeders, with eyes and two pairs of wings. They leave in flights to pair up and found colonies elsewhere.
Replacement breeders	In many species some individuals can take over breeding when the queen and king weaken or the colony spreads into satellite nests.

What is the difference between the main nest and a satellite nest?

A large subterranean colony seldom has a single nest, which is why clearing away one nest indoors does not mean the termites have gone.

Compare	Main nest and satellite nest
Who lives there	Main: queen, king, eggs and young. Satellite: mostly workers and soldiers.
Where it is	Main: where moisture is steadiest, typically under the floor or in the soil. Satellite: close to food and water, upper floors included.
What it is for	Main: breeding and raising young. Satellite: a staging post that lets workers forage far off. Tunnels and mud tubes join the two.
When it is destroyed	Lose a satellite and the rest withdraw or set up another. While the main nest is intact, the colony carries on.

Subterranean and drywood termites: how do they differ?

Termites in homes are usually divided into two groups by where they live. Subterranean is the everyday name for the group that needs soil and moisture; drywood termites spend their whole lives inside a piece of timber. Which group you have decides the treatment, and it takes a survey to establish it.

Compare	Subterranean and drywood
Where they nest	Subterranean: in soil, under the floor, around foundations and tree stumps, always in touch with a source of damp. Drywood: inside the timber they are eating, such as a door frame, a beam or furniture; the moisture in the wood is enough.
How they get in	Subterranean: from below, through cracks in the floor, the base of walls and service shafts. Drywood: winged termites fly into an open joint in timber, or arrive in furniture infested elsewhere.
Traces	Subterranean: mud tubes, and eaten wood packed with damp soil. Drywood: no soil; dry, hard, separate pellets in a pile under the item.
Colony and speed	Subterranean: usually a very large colony that forages widely, sometimes beyond one property, and damages faster. Drywood: far smaller and slower, though one house can hold several colonies.
Why they are hard to treat	Subterranean: the nest is out of reach, so the colony is reached through its routes. Drywood: every infested piece has to be found, including timber hidden in ceilings and roofs.

Should I break open the nest or dig for the queen?

In a home, in most cases, no. It seldom achieves its aim and usually makes later treatment harder. A mound on its own in the garden, well away from the house, is a different case, but have it looked at first: the part above ground is a small fraction of the nest.

The nest that is easy to see indoors is usually a satellite, and the queen is not in it.
The main nest can lie deep under the floor or the foundations, or beyond the boundary; reaching it means breaking up the floor or the footings.
A disturbed colony scatters, seals the old route and opens a new one somewhere less visible. The intact route is what a treatment provider needs.
In many species the colony can replace a lost queen, so catching her does not necessarily end the nest.
Breaking into a wall near sockets and buried pipes carries its own risks, for whoever does it and for the building.

I have found a termite nest. What should I do, and what should I avoid?

None of this needs tools or chemicals. The aim is to keep the evidence intact until the survey while limiting further damage.

Do	Do not
Leave the nest, the mud tubes and the soil covering as they are	Prise, break or scrape them off, or open the nest to look inside.
Photograph or film each spot, noting the room and the floor	Wash, repaint or fill a place that shows traces before it has been surveyed.
Move books, fabrics and loose wooden items away, checking each	Carry anything with termites in it to another room or another house unchecked.
Shut off the valve or repair a nearby water leak, if you can	Pour water, boiling water or any other liquid into the nest; added moisture only helps the termites.
Keep the area ventilated and little used	Spray insecticide on the nest or the tubes, or use fire, flammable liquids or home-mixed chemicals.
Tell the adjoining house, or building management in an apartment	Dig up the floor or chisel into a wall to follow the nest yourself.
Ask for a survey and a written plan	Decide on the strength of a price given by phone before anyone has seen the house.

When should I call for a survey, and what does UpClean do?

Dealing with a nest means stopping the whole colony, which takes a plan drawn up after a survey. Call early if you see a nest mass, if a mud tube is rebuilt after being broken, or if a damp patch of wall, ceiling or floor persists with soil pushed out of it. Call, too, before fitting a built-in wardrobe or laying a timber floor where termites have been.

UpClean does the survey itself, free of charge, and prepares the quote only afterwards, with a written plan. UpClean's own pest-control technicians carry out the treatment. Up specialists, UpClean's identity-verified and trained staff, cover the furniture, watch each working point and clean up, removing old nest material once the technicians confirm the colony is inactive. UpClean has declared its eligibility to provide pest-control services as required by regulation; the declaration and product information are available on request.

Each visit is followed by an Up Report, a written record of the treated locations with photographs and follow-up dates. To arrange a survey, send photos of the nest or the tubes to 0968 726 135 on WhatsApp or Zalo, or ring any day between 7:00 AM and 8:00 PM. Enquiries, quotes and the Up Report can be in English. You are given the specialist's name and photo ahead of the visit, for building management if your building wants outside staff registered.

Termite control: What the service includes and the areas covered.
Pre-construction termite protection: For a house being built or having its floor slab redone.
Book a survey: Send the request online.

Frequently asked questions

Is the termite queen in the nest on my wall?+

Usually not. She is in the main nest, which for subterranean termites tends to be under the floor or in the soil around the foundations. What you can see on a wall is mostly a satellite nest or a route.

If I kill the queen, does the colony die?+

Not necessarily. In many species the colony can raise replacement breeders and carry on. That is why treatment is aimed at the whole colony and not at finding one individual.

Does the nest have to be found before termites can be treated?+

Not always. With subterranean termites, many methods act on the colony through its routes, so what matters is finding the mud tubes in use. The position of the nest is estimated at the survey to choose the treatment points.

Will a termite nest go away on its own if I leave it?+

No. While the house offers wood, paper and moisture, the colony has no reason to leave. A dry, empty mud tube shows only that the termites have changed route, not that the nest has stopped.

How do I know a termite nest is no longer active?+

When the provider's follow-up checks find no live termites at the monitored points, the mud tubes are not rebuilt and no new damage appears. A few days without seeing termites is not enough; they may only have changed route.

Some people say a termite nest in the house brings luck. Should it be left alone?+

Beliefs differ from family to family, and UpClean respects them without comment. In building terms the answer is clearer: a nest means a colony is feeding on the wood and paper in the house, and the damage builds up slowly and rarely shows early. Decide on the actual damage, which a survey can establish.

Termite nest in the house: what it looks like, where it is, how a colony works and what to do