Drywood termites are termites that establish colonies entirely inside relatively dry wood without maintaining a continuous connection to soil. Their most recognizable sign is a pile of hard, uniformly shaped fecal pellets pushed through tiny openings called kick-out holes.
The main decision factor is not simply whether pellets are present. It is whether the infestation is limited to one clearly identified piece of wood or may involve multiple hidden colonies throughout the structure. Localized treatment depends on finding every active colony
. Whole-structure treatment is considered when the distribution cannot be mapped confidently
or when evidence appears in several areas.
After finding possible drywood termite evidence:
- Photograph the pellets, hole, damaged wood, and surrounding area before cleaning.
- Collect a small sample in a labeled container.
- Clean the surface carefully and monitor for new pellets.
- Do not plug the hole, spray the pile, or dismantle structural wood before inspection.
- Arrange a professional termite inspection when pellets return, swarmers appear indoors, or more than one location is involved.
Use our termite inspection guide to document the building systematically. Our termite control guide compares the major professional methods across termite groups.
- What Are Drywood Termites?
- Where Drywood Termites Are Most Relevant
- What Drywood Termites Look Like
- Drywood Termite Pellets
- Kick-Out Holes
- Swarmers and Discarded Wings
- Drywood Termite Damage
- Drywood vs. Subterranean Termites
- Why Drywood Termite Inspection Is Difficult
- Drywood Termite Treatment Options
- Localized Treatment vs. Whole-Structure Treatment
- How to Compare Drywood Termite Proposals
- Can You Treat Drywood Termites Yourself?
- Drywood Termite Prevention
- Monitoring After Treatment
- Common Drywood Termite Mistakes
- When to Call a Termite Professional
- Drywood Termite Pellet Evidence Collection Checklist
- Frequently Asked Questions
- What are drywood termites?
- What is the most common sign of drywood termites?
- What do drywood termite pellets look like?
- Do termite pellets mean the infestation is active?
- How large are drywood termite kick-out holes?
- Do drywood termites make mud tubes?
- Can drywood termites infest furniture?
- Can one pellet pile mean the whole house is infested?
- Is localized treatment effective?
- When is whole-structure fumigation used?
- Does fumigation prevent drywood termites from returning?
- Can heat treat drywood termites?
- Will a soil termite treatment kill drywood termites?
- Can I treat drywood termites myself?
- When should I call a termite professional?
What Are Drywood Termites?
Drywood termites belong to termite groups adapted to living within wood that contains relatively little moisture. Unlike subterranean termites, they do not normally travel from a soil colony through mud tubes. A mated pair can enter a crack, joint, exposed end grain, attic member, trim board, furniture component, or other suitable wood and begin a colony inside it.
The colony develops within connected chambers and galleries. Drywood termite workers are replaced functionally by immature termites called pseudergates, which feed, excavate, maintain galleries, and can develop into other castes. Soldiers defend openings, and winged reproductive adults leave mature colonies during regional swarm seasons.
Drywood colonies are often smaller than major subterranean colonies, but a structure can contain several independent colonies. Damage can therefore occur in scattered roof framing, eaves, windows, doors, trim, furniture, flooring, or decorative wood rather than along one soil-connected route.
Where Drywood Termites Are Most Relevant
Drywood termites are most important in warmer regions where local species can establish outdoors and in buildings, including parts of California, the Gulf Coast, Florida, Hawaii, and other warm coastal or southern areas. Exact distribution differs by species.
They can also appear outside their normal structural range when infested furniture, reclaimed wood, antiques, doors, picture frames, wooden art, packing material, or other wood products are transported. A pellet pile in a single movable item may represent an imported colony rather than a building-wide infestation.
Regional relevance affects treatment decisions. In an area where structural drywood termites are common, evidence in several roof or exterior components may suggest multiple colonies. In a colder inland region, an isolated antique or furniture item may be a more likely source, although the surrounding structure still requires inspection.
What Drywood Termites Look Like
| Caste or stage | Typical appearance | Where it is found | Identification value |
|---|---|---|---|
| Immature termite or pseudergate | Pale, soft-bodied, wingless, with straight beadlike antennae | Inside galleries | Confirms live termites but may require a soldier or swarmer for group-level identification |
| Soldier | Pale body with a darker enlarged head and prominent jaws | Near disturbed galleries or openings | Head shape helps an expert distinguish termite groups and species |
| Swarmer or alate | Pigmented body with four approximately equal-length wings | Near emergence points, windows, lights, or outdoor swarm areas | Indoor emergence can reveal a mature wood-contained colony |
| Dealate reproductive | Former swarmer with wings shed | Inside a new gallery or near a swarm location | May indicate a newly established pair but not the size of the parent infestation |
Color varies by species and caste. Pale termites are sometimes informally described as “white termites,” while swarmers may be reddish, brown, dark brown, or nearly black. Color alone is not a reliable species guide.
Drywood Termite Pellets
Drywood termites conserve moisture by producing hard, dry fecal pellets. Workers push the pellets out of galleries through small kick-out holes, creating piles beneath infested wood.
Typical drywood termite pellets are:
- Uniform in size within a pile
- Hard and dry rather than powdery
- Elongated with rounded ends
- Marked by six flattened or concave sides and longitudinal ridges
- Variable in color according to the wood and material consumed
- Comparable in overall scale to coarse sand grains
The University of California Statewide IPM Program describes six-sided pellets as diagnostic evidence for drywood termites. Expert confirmation may still be needed because coarse wood debris, cockroach droppings, beetle frass, seeds, sand, and dampwood termite pellets can be confused in photographs.
Do Pellets Prove the Colony Is Active?
No. Pellets establish that drywood termites have occupied the wood
, but a pile alone cannot prove that live termites remain. Old pellets can fall from galleries after vibration, repairs, furniture movement, temperature changes, or opening and closing a door.
Clean the area after photographs and samples are collected. New pellets returning from the same opening increase the likelihood of current activity, but they still do not show how large the colony is or whether other colonies exist elsewhere.
Kick-Out Holes
Kick-out holes are small openings termites use to dispose of pellets. They are often pin-sized and may be less than 2 millimeters across. Common locations include wood joints, cracks, seams, window and door frames, eaves, fascia, attic framing, furniture, trim, and flooring.
A kick-out hole may be temporarily sealed from inside the gallery after pellets are expelled. It can be difficult to see without angled light or magnification.
Do not assume every small hole is a termite opening. Powderpost beetles, furniture beetles, nails, staples, manufacturing marks, and old repairs can create similar holes. The pellet shape and the wood damage pattern matter.
Swarmers and Discarded Wings
Drywood termite colonies release winged reproductive adults after they mature. The season and time of day vary by species and region. Some drywood termites swarm during daylight; others fly near dusk or after dark and may be attracted to lights.
Indoor swarmers may emerge from:
- Window and door frames
- Attic or roof wood
- Eaves and fascia
- Wall trim
- Flooring
- Furniture or decorative wood
Termite swarmers have a broad waist, straighter antennae, and four wings of roughly equal length. Winged ants have a pinched waist, elbowed antennae, and shorter hind wings.
One swarmer entering from outdoors does not establish a structural infestation. Several insects emerging from wood or recurring piles of equal-sized shed wings are much stronger evidence.
Drywood Termite Damage
Drywood termites excavate galleries inside wood while often leaving a thin exterior surface intact. Damage may not become visible until paint blisters, trim breaks, a gallery is opened, or pellets appear.
Possible findings include:
- Hollow-sounding wood
- Thin or blistered surfaces
- Irregular chambers connected by narrow passages
- Pellets packed in unused sections of galleries
- Damage crossing the grain of the wood
- Soldiers or pale termites inside opened galleries
Drywood galleries are usually cleaner than subterranean termite galleries and do not contain the soil or mud commonly associated with subterranean activity.
Damage severity depends on colony age, number of colonies, wood dimensions, structural role, previous treatments, and how much wood remains. A pest inspector can define termite distribution, but a contractor, engineer, or other qualified building professional may be needed when load-bearing wood is affected.
Drywood vs. Subterranean Termites
| Feature | Drywood termites | Subterranean termites |
|---|---|---|
| Colony location | Inside wood | Usually in soil or another moist colony site |
| Soil connection | Not required | Normally maintained through soil or protected tubes |
| Characteristic external sign | Uniform hard pellets and kick-out holes | Mud tubes and soil-lined galleries |
| Gallery condition | Relatively clean, sometimes containing stored pellets | Often lined with soil or mud |
| Common building distribution | Separate colonies in roof, trim, furniture, doors, windows, or other wood | Foraging routes from soil into foundations and structural wood |
| Main professional treatments | Wood removal, localized treatment, heat, chamber treatment, or structural fumigation | Liquid soil treatment, monitored bait systems, and selected structural treatments |
See our subterranean termite guide for mud tubes, soil entry pathways, liquid barriers, and bait systems.
Why Drywood Termite Inspection Is Difficult
A visual inspection can identify pellets, holes, wings, damaged wood, and swarmers, but it cannot see through every wall, roof assembly, cabinet, floor, or furniture component.
Inspection limitations include:
- Colonies remain entirely inside wood
- Kick-out holes can be sealed or hidden
- Pellets may fall far from their original opening
- Separate colonies can occupy several areas
- Paint, roofing, insulation, stucco, paneling, cabinets, and stored items restrict access
- Old and current evidence can look similar
Specialized tools may include moisture meters, sounding devices, borescopes, acoustic equipment, movement detectors, or trained detection dogs. These tools can help target inspection but do not remove the need to interpret physical evidence and construction.
A written report should identify confirmed evidence, suspected areas, inaccessible locations, the assumed infestation distribution, and how those uncertainties affect the treatment recommendation. Our termite inspection cost guide explains why a diagnostic inspection may differ from a free sales estimate.
Drywood Termite Treatment Options
Drywood termite treatment is divided into localized treatment and whole-structure treatment. The central tradeoff is coverage versus disruption.
Removal and Replacement of Infested Wood
Removing an infested item or board can be effective when the colony is truly limited to that material and the remaining structure has been inspected. Examples include a movable picture frame, a small furniture item, or an isolated nonstructural board.
Removal fails when another colony remains in adjacent or inaccessible wood. Structural wood should not be cut or discarded until its load-bearing role and treatment implications are understood.
Localized Chemical Treatment
A licensed professional may drill or use an existing opening to place a labeled liquid, foam, dust, or other termiticide into galleries. Success depends on locating the colony and delivering the treatment to the termites.
Localized treatment limitations include:
- Hidden colonies may be missed
- Gallery connections may be misunderstood
- Decorative finishes may require drilling
- Performance varies by product, placement, access, and colony distribution
- New infestations can establish later
The EPA requires pesticides sold for termite use to be registered and used according to their labels. A product that only kills termites on contact has not necessarily demonstrated that it protects a structure.
Localized Nonchemical Treatment
Professional localized options may include controlled heat, microwave energy, electrocution, or other specialized methods. These methods can avoid or reduce pesticide residue, but they remain highly dependent on accurate colony detection, equipment access, treatment coverage, wood thickness, heat sinks, and nearby materials.
They should not be treated as guaranteed “chemical-free cures.” A missed colony can continue after the treated area is finished.
Whole-Structure Fumigation
Structural fumigation encloses the building and exposes the treatment space to a registered fumigant gas under licensed professional control. Its main advantage is simultaneous treatment of accessible and inaccessible drywood termite colonies throughout the enclosed structure.
The UC Statewide IPM Program describes properly monitored sulfuryl fluoride fumigation as a high-efficacy whole-structure option. Occupants, pets, and plants must leave, preparation is substantial, and reentry is allowed only after professional aeration and clearance.
Fumigation does not repair damage and leaves no continuing barrier against a later introduction.
Whole-Structure Heat
Professional heat treatment raises temperatures throughout target wood while technicians monitor difficult areas for cold spots. It avoids fumigant gas but can affect heat-sensitive belongings, finishes, electronics, adhesives, and other materials.
Heat also provides no residual protection after the building cools. Successful treatment depends on preparation, airflow, sensor placement, target-wood temperatures, and complete coverage.
Chamber Treatment for Furniture and Belongings
Valuable furniture or movable wood items may be treated separately in a professional chamber or approved enclosure. This can preserve an item without fumigating the entire building.
It is appropriate only when inspection shows that the problem is limited to the items being removed or when the structure receives a separate treatment. Returning treated furniture to an infested building does not solve the structural problem.
Localized Treatment vs. Whole-Structure Treatment
| Method | Best fit | Main strength | Main limitation |
|---|---|---|---|
| Wood removal | One confirmed removable item or board | Physically removes the known colony | Fails if additional colonies remain |
| Localized liquid, foam, or dust | Accessible, accurately mapped colony | Targets galleries with limited building disruption | Detection and delivery must be precise |
| Localized heat or other device-based method | Reachable wood with compatible surrounding materials | Nonfumigant localized option | Cold spots and missed colonies can reduce control |
| Whole-structure fumigation | Multiple, widespread, inaccessible, or uncertain colonies | Treats the full enclosed structure simultaneously | Evacuation, preparation, licensing, cost, and no residual protection |
| Whole-structure heat | Building suited to professional monitored heating | Whole-building nonfumigant approach | Material sensitivity, cold spots, preparation, and no residual protection |
| Chamber treatment | Movable furniture or valuable wood items | Treats an item outside the occupied structure | Does not treat colonies remaining in the building |
How to Compare Drywood Termite Proposals
A useful proposal should answer:
- What evidence confirms drywood termites?
- Which wood members or rooms are affected?
- Which areas were inaccessible?
- Why is the infestation considered localized or widespread?
- What registered product or treatment method will be used?
- How will hidden colonies be addressed?
- What preparation, evacuation, drilling, or repair is required?
- What follow-up inspection is included?
- Does the warranty cover retreatment, damage, or both?
- What conditions void the warranty?
Do not compare a localized quote with a whole-structure quote as though they provide identical coverage. Ask each company to map the treatment zone and state the limitations in writing.
Can You Treat Drywood Termites Yourself?
Homeowners can preserve evidence, inspect movable objects, reduce wood cracking, screen openings, and arrange expert identification. Treating a structural infestation is different.
DIY products may kill termites reached directly while leaving hidden colonies untouched. Drilling without understanding gallery direction can damage wood and miss the colony. Heat guns, ovens, improvised chambers, household gases, foggers, fuel-burning devices, and unregistered chemicals create fire, exposure, and property-damage risks.
Drywood Termite Prevention
Prevention focuses on reducing entry points and avoiding movement of infested wood.
- Inspect used furniture, antiques, reclaimed lumber, wooden art, frames, doors, and imported wood before bringing them indoors.
- Seal cracks, joints, exposed end grain, and gaps around trim when construction permits.
- Maintain paint, sealant, roofing, flashing, and exterior wood finishes.
- Screen vents and larger openings with suitable corrosion-resistant mesh.
- Repair damaged eaves, fascia, window frames, and door frames.
- Store salvaged or untreated wood away from the structure until inspected.
- Keep records of pellet locations, swarm events, repairs, and previous treatments.
- Arrange periodic inspections in regions where drywood termites are established.
Soil barriers and subterranean termite bait stations do not prevent a drywood termite pair from entering exposed wood above ground.
Monitoring After Treatment
Clean old pellet piles only after documentation. Reinspect the same locations for new pellets, swarmers, wings, or damage. Mark repaired kick-out holes and drilled treatment points on a diagram so later evidence can be compared accurately.
Old pellets may continue to fall after successful treatment, especially when wood is disturbed. New repeated deposits, live termites, fresh swarmers, or pellets from a different location require the provider to investigate.
Whole-structure treatment does not prevent reinfestation. Maintain exterior wood, screen openings, inspect incoming wood items, and follow the contract’s inspection schedule.
Common Drywood Termite Mistakes
- Assuming every grain-like pile is termite frass
- Using pellet color as the main identification feature
- Calling old pellets proof of current activity
- Cleaning all evidence before collecting a sample
- Plugging kick-out holes before inspection
- Using a subterranean termite soil treatment for a wood-contained colony
- Choosing spot treatment without asking how additional colonies were excluded
- Assuming fumigation or heat provides residual protection
- Treating one furniture item while ignoring structural evidence
- Repairing damaged wood before colony control and documentation
When to Call a Termite Professional
Arrange a professional inspection when:
- Uniform pellets return after cleanup
- A kick-out hole is visible above a pellet pile
- Drywood termite swarmers emerge indoors
- Evidence appears in more than one room or structural area
- Roof, attic, eave, window, door, floor, or load-bearing wood is affected
- The source may be hidden behind finishes
- A previous localized treatment did not stop activity
- Whole-structure fumigation or heat is being considered
Ask the inspector to show the evidence, identify inaccessible areas, explain how infestation extent was estimated, and compare localized and whole-structure coverage before you authorize treatment.
Drywood Termite Pellet Evidence Collection Checklist
| Evidence field | What to record |
|---|---|
| Date and location | Room, furniture item, wall, attic, eave, window, door, floor, or trim |
| Pellet pile | Size, distribution, uniformity, color range, and surface beneath it |
| Kick-out hole | Exact position, wood joint or crack, apparent diameter, and height above pile |
| Cleanup test | Date cleaned and whether new pellets returned |
| Swarm evidence | Live swarmers, wings, date, time, weather, and emergence point |
| Wood condition | Hollow sound, blistering, breakage, gallery, or visible termites |
| Property distribution | Every room, wood item, and exterior area with similar evidence |
| Previous work | Localized treatment, fumigation, heat, repair, replacement, and warranty |
| Specimen | Pellets, termite, soldier, swarmer, wings, photographs, and identification result |
Frequently Asked Questions
What are drywood termites?
Drywood termites are termites that live entirely inside relatively dry wood and do not require a continuous connection to soil.
What is the most common sign of drywood termites?
The most characteristic external sign is a pile of uniform, hard fecal pellets pushed through a small kick-out hole.
What do drywood termite pellets look like?
They are hard, elongated coarse-sand-sized pellets with rounded ends, six flattened or concave sides, and longitudinal ridges. Color varies with the wood consumed.
Do termite pellets mean the infestation is active?
Not by themselves. Pellets prove past or present occupancy. New pellets returning after cleanup increase concern but still require inspection.
How large are drywood termite kick-out holes?
They are usually pin-sized openings and may be less than 2 millimeters across, often located in a joint or crack.
Do drywood termites make mud tubes?
No. Mud tubes and soil-lined galleries are associated primarily with subterranean termites.
Can drywood termites infest furniture?
Yes. Furniture, antiques, picture frames, doors, wooden art, and reclaimed wood can contain a colony and transport it to another property.
Can one pellet pile mean the whole house is infested?
No. It may come from one item or colony, but hidden colonies elsewhere cannot be excluded without a broader inspection.
Is localized treatment effective?
It can be effective when every colony is accurately located and the treatment reaches the termites. The main limitation is missing hidden colonies.
When is whole-structure fumigation used?
It is considered when infestations are widespread, inaccessible, present in several areas, or impossible to map confidently with localized inspection.
Does fumigation prevent drywood termites from returning?
No. Fumigation controls termites inside the treated enclosure but leaves no continuing barrier against later reinfestation.
Can heat treat drywood termites?
Professional monitored heat can be used for localized or whole-structure treatment, but success depends on reaching all target wood and avoiding cold spots.
Will a soil termite treatment kill drywood termites?
No. Drywood colonies live inside wood and do not need to cross a soil treatment zone.
Can I treat drywood termites myself?
Homeowners can preserve evidence and reduce entry risks, but structural treatment requires accurate colony detection, suitable equipment, registered methods, and professional expertise.
When should I call a termite professional?
Call when uniform pellets return, kick-out holes or indoor swarmers appear, structural wood is affected, or evidence occurs in more than one location.
