A single dampwood termite in wet, decayed wood, where this species is most commonly found
A single dampwood termite in wet, decayed wood, where this species is most commonly found

Dampwood Termites

A moisture-driven termite species that can quietly damage structural wood

Dampwood termites thrive in wet, decaying wood. While less common than other termite species, they can cause significant structural damage when moisture issues go unaddressed.

They’re often found in areas with leaks, wood rot, poor drainage, or direct soil contact.

Franz Termite Control provides expert termite inspections and targeted treatments to correctly identify and eliminate dampwood termites and the moisture conditions that attract them.

If you suspect a termite infestation, please contact us for a termite inspection by our certified and licensed professional inspectors.

 

Dampwood termite workers, shown here in a close-up photo, thrive in water‑damaged or moisture‑rich wood. Their presence is a strong indicator of underlying moisture issues
Dampwood termite workers, shown here in a close-up photo, thrive in water‑damaged or moisture‑rich wood. Their presence is a strong indicator of underlying moisture issues

What Makes Dampwood Termites Unique?

Dampwood termites are larger than both subterranean and drywood species. Unlike subterranean termites (which live in soil) and drywood termites (which live entirely in wood), dampwood termites require high moisture levels to survive.

Although they look similar to drywood termites at first glance, dampwood termites are typically larger and attracted to light, which can sometimes lead to an accumulation of swarmers (alates) around porches, entryways, or exterior light sources.

Where dampwood termites are found

  • Water-damaged siding.
  • Leaky decks, balconies, or exterior stairs.
  • Moist crawl spaces.
  • Wood that touches soil.
  • Roof leaks.
  • Plumbing leaks.
  • Areas with long-term condensation.

Because these insects rely on damp, softened wood, their presence nearly always indicates an underlying moisture issue.

Pacific Dampwood Termites

The species most common in our region is the Pacific Dampwood Termite. These termites are significantly larger than other species – workers, soldiers, and swarmers are all noticeably bigger than their drywood or subterranean counterparts.

Egg mass of dampwood termites.
Pacific dampwood termite worker with pale, soft body
Adult pacific dampwood termite swarmer with long, translucent wings.

Pacific Dampwood Termites: Egg mass, worker, and an adult winged swarmer.
Images courtesy of Oregon Digital, licensed under CC 4.0 International (CC BY 4.0): License.

Distinct characteristics

  • Soft, cream-to-tan bodies.
  • Large soldiers with big mandibles.
  • Winged dampwood termites swarm on warm summer or early fall evenings. This seasonal timing is similar to drywood termites, but differs from subterranean species, which swarm after rainfall.
  • Require sustained moisture to establish colonies

Unlike subterranean termites, they do not build mud tubes, and unlike drywood termites, their pellets look different and often stick to damp surfaces.

Dampwood Termite Pellets (Frass)

Dampwood termite droppings differ from drywood pellets. Drywood termites leave dry, sand-like, six-sided pellets (something that is challenging to impossible to see without a microscope). Dampwood termites leave soft, sticky, irregular pellets that clump together due to moisture in the wood.

If you’re finding mysterious pellets but aren’t sure which species caused them, our inspectors can identify the source immediately.

Dampwood termite frass pellets displayed beside a ruler and penny for scale, showing moist, irregular droppings typically found during an infestation.

PACIFIC DAMPWOOD TERMITE – Zootermopsis angusticollis frass” by JJ Greive, licensed under CC BY-SA 3.0. Cropped for Web Optimization. Source. License.

Dampwood Termites vs. Other Termites

Dampwood vs. Drywood Termites

  • Dampwood termites require moisture. Drywood termites prefer dry, intact wood.
  • Dampwood pellets stick. Drywood pellets are dry and granular.
  • Dampwood colonies are usually smaller.
  • Drywood termites often require termite fumigation. Dampwood termites do not.

Dampwood vs. Subterranean Termites

  • Dampwood termites do not live in soil. Subterranean termites do.
  • Dampwood termites do not build mud tubes.
  • Subterranean colonies are larger and more destructive.
  • Dampwood termites infest wood already compromised by moisture.

If you’re unsure which species is present, our licensed inspectors will determine it during your inspection.

How to Get Rid of Dampwood Termites

Because dampwood termites depend on moisture, the key to eliminating them is correcting the conditions that allow them to thrive.

Franz Termite Control’s approach includes:

1. Identifying the source of moisture

We inspect for:

  • Leaks
  • Rot
  • Plumbing failures
  • Ground-contact wood
  • Drainage issues
  • Damp crawl spaces
  • Roof penetration problems

2. Treating the affected wood

Localized treatments (wood injections, surface applications) are often effective because dampwood colonies stay contained within wet wood.

 

3. Repairing damaged or moisture-compromised areas

We are also a licensed general contractor, and provide structural repair services to replace:

  • Rotting beams
  • Damaged siding
  • Wet structural members
  • Deck or stair components

Learn more about our termite damage repair services.

 

4. Preventing future infestations

By resolving moisture conditions, we make it impossible for dampwood termites to return.

Dampwood Termite Treatments – Bay Area, CA

 

Egg mass of dampwood termites.
Pacific dampwood termite soldier with enlarged head and strong mandibles for colony defense.
Pacific dampwood termite worker with pale, soft body.
Developing dampwood termite nymph with visible wing buds, a transitional stage for swarmers.
Adult pacific dampwood termite swarmer with long, translucent wings.

Pacific Dampwood Termite Stages & Castes. Egg mass, worker, soldier, developing
reproductive nymph with wing buds, and the adult winged swarmer.
Images courtesy of Oregon Digital, licensed under CC 4.0 International (CC BY 4.0): License.

While dampwood termites don’t spread as aggressively as subterranean termites, they can still cause:

  • Significant structural weakening
  • Expensive moisture-related deterioration
  • Conditions attractive to even more destructive species

Oftentimes, the rot and moisture is more damaging than the dampwood termites themselves. Left untreated, moisture problems can eventually attract subterranean termites, which can devastate a home far more quickly.

Have you found signs of termites or haven’t had an inspection in the last 2 – 3 years?

 

Franz Termite Guarantee

If they come back, so do we. We stand by our work and it shows. Your home will be termite-free.

View our detailed guarantees

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Customer Testimonials

Discover exceptional experiences through testimonials from our satisfied customers.

They were very clean and took us a lot of time to show us where the termites were in the garage and gave us an overview of the damage. They were very patient. All of the things they moved in order to access the area...
Patricia O.
Palo Alto, CA
Great job! They showed up when they said they would. They were very courteous and polite. The inspector was very thorough and took his time reviewing all areas. They provided the report in...
Bruce A.
San Jose, CA
The company was professional, phoned us in a timely manner and the inspector, knew what he was doing and arrived on time. I'd hire them again in a heartbeat!!!
Carol K.
Redwood City, CA
I was very pleased and it was difficult to see where they drilled through my paving stone mortar. Great work.
Anonymous
Palo Alto, CA
Franz Termite control has some of the most professional staff members in the Bay Area and they are very knowledgeable in their craft.
Dominique Warner
Palo Alto, CA
Each person was professional, timely and educated me. They were very careful about my light carpet without my asking. They even thanked me several times for leaving the evidence where and as I'd found it so that they knew where to start with their inspection and treatment. I will definitely call them again for any future termite problems in any residence I have.
A E.
Menlo Park, CA

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