Phones answered 24/7Seattle, WA 98101
Call (855) 974-4733
(855) 974-4733
Serving King County

Dampwood Termite Control in Seattle

Dampwood termites need wet wood. Control means drying and removing the wood, with treatment only where the findings call for it.

Call (855) 974-4733Free estimate
  • Phones answered 24/7
  • Damp wood and crawl-space pests
  • Price confirmed before treatment

Get a fast quote

Fastest: call (855) 974-4733. Or send this and we call you back.

By sending this form you agree that Seattle Pest Control may call or text you at the number provided about this request. Consent is not a condition of purchase. Message and data rates may apply. See our Privacy Policy.

Dampwood Termites

Dampwood Termite Control: what it covers

Quick answer

Dampwood termite control in Seattle starts with moisture: WSU PestSense says these termites live in wet or rotting wood, and pesticides are rarely needed once the wood is removed or dried. A technician finds the damp source and any affected timber. Seattle Pest Control connects King County callers with an independent local company; same-day visits are offered when a technician is free.

Dampwood Termite Control illustration for Seattle, WA, with pine trees in the background

Of the two native termites in Washington, the dampwood termite is the one tied most closely to this climate. Washington State University's PestSense fact sheet describes colonies living in wet or rotting wood, swarming in late summer or fall, especially after rain. Because the insects need moisture, the treatment is not mainly a chemical one. WSU's advice for homes is to remove form boards left from construction, keep wood off the soil, ventilate crawl spaces and avoid stacking woodpiles against the house.

That advice reshapes what a good visit looks like. The technician is as much a detective of water as of insects: where does rain pool, which timber stays soft, and what has been touching the ground for years? Pesticides are described by WSU as rarely needed, so a company that suggests an immediate blanket treatment without explaining the damp source deserves questions. Seattle Pest Control is a call line, answered 24/7, that connects you with an independent local pest-control company; a same-day visit is offered only when a technician is free.

Service area
Seattle & King County
Availability
Phones answered 24/7
Warning signs

Signs you need dampwood termite control

Do not disturb a suspected infested timber with a pry bar or open a wall to look for galleries, and do not treat wood yourself with garden products. If structural wood such as a beam or sill feels soft, keep weight off it and have a contractor look.

  • Large winged termites, or discarded wings in a pile, on a sill or floor in late summer or fall, particularly after rain
  • Soft, spongy or darkened timber in a crawl space, deck post, fence post or porch step
  • Galleries inside wood that run with the grain and look smooth and clean rather than packed with soil
  • Pellet-like droppings that gather in small heaps beneath an infested timber
  • Old stumps, log ends or form boards left in the ground near the foundation
  • A woodpile stacked against a wall or a deck that sits low and stays wet
  • Wet insulation, condensation or standing water in a crawl space
  • Fungal decay or a musty smell that shows wood has been damp for a long time
Cost

How much does dampwood termite control cost in Seattle?

No outside price is printed here. These are the things that change what a company quotes for dampwood termite work.

Dampwood Termite Control pricing in King County (2026)
JobTypical rangeWhat it includes
How much wood is affectedVariesA single deck post and a run of crawl space joists are different amounts of work
AccessDepends on accessLow crawl spaces and wood behind finished surfaces take more time
Moisture sourceQuoted separatelyDrainage, plumbing, gutters and ventilation are separate repairs from the pest work
Whether treatment is neededVariesWhere moisture correction and removal are enough, product use may be small
Follow-up visitsOne or severalA check after drying is usually worth having and is priced when you book

Your exact price is confirmed on site before any work begins. For how quotes are put together, see the Seattle cost guide.

Job stories

Typical jobs for dampwood termite control

Typical job
Illustration: Typical call: winged termites near a Woodinville fence post

Typical call: winged termites near a Woodinville fence post

What homeowners notice
After the first heavy rain of the fall, winged insects collect on a sill, and a fence post at the edge of a wooded lot is soft at its base.
What we do
The technician identifies the winged insects as dampwood termites, probes the fence post, a buried form board and a deck beam, and notes the wet ground where a downspout empties. The advice is to remove the infested wood, lift lumber off the soil and fix the drainage, with any treatment explained and priced first.
What to expect
The owner leaves with a map of the damaged wood and a plan that deals with the moisture, so the colony has no wet wood to return to.

About two hours typical visit

Options

Types and options for dampwood termite control

Moisture correction and wood removal

WSU's first-line approach: fix leaks, ventilate, lift wood off soil and remove infested pieces. It treats the cause and often needs little or no pesticide. A contractor handles construction repairs.

Spot treatment

Where infested wood cannot be removed at once, a targeted treatment may be applied to it, with the label followed. This is paired with moisture work, since new termites can return to wet wood.

Monitoring after repair

A follow-up visit after the wood has dried documents whether activity has stopped. It also catches a missed pocket in a corner or behind trim.

Pre-sale documentation

A buyer or seller may want the situation recorded. See termite inspection for the inspection itself and who is licensed to perform it.

Still stuck? We pick up 24/7.

If it's an emergency, call now. For non-urgent dampwood termite control, send the form and we'll call you back.

Call (855) 974-4733Get a quote

What makes dampwood termites different from other termites?

Dampwood termites live in wet or rotting wood, while subterranean termites live in the soil and travel to wood through mud tubes. WSU PestSense says dampwood swarms occur in late summer or fall, especially after rain, and that subterranean termites may swarm in any month and have no reliable non-chemical prevention.

The difference explains the treatment. Take away the wet wood and a dampwood colony loses what it needs. For subterranean termites, soil contact is a constant, so prevention depends on different measures, and treatment is more often chemical.

If you cannot tell which kind you have, a technician can distinguish them by the swarmers, the wood and the presence of mud tubes. The termites in western Washington guide walks through the clues.

Why does rain bring swarms?

WSU PestSense says dampwood termites swarm in late summer or fall, especially after rain. Rain softens the ground and wood and raises humidity, which suits the winged adults leaving to start new colonies. A swarm shows the colony exists nearby, not that your house is infested.

The same swarm can come from a stump, a dead tree, a fence post or another house. One or two winged insects outside is much less of a worry than a dozen on your sill with wood in the room that you know is damp.

If you see swarmers, note the date and the weather and keep a few. A specimen turns a call into an identification.

Do I need pesticide at all?

Often not. WSU PestSense says pesticides are rarely needed for dampwood termites if infested wood is removed and the moisture is fixed. Treatment may still make sense where wood cannot be replaced right away. A company should explain why it recommends a product and what the moisture plan is.

This is a point to raise with any provider. Ask what would happen if the wood were dried and removed, and whether the product is meant to supplement that or replace it.

A quote that includes only treatment, and nothing about drainage, ventilation or replacement, leaves the cause in place.

  • Ask what is causing the dampness
  • Ask which wood should be removed
  • Ask what the product does that drying cannot
  • Ask about a follow-up and what it includes

Which fixes are DIY and which need a contractor?

Simple fixes you can do yourself include clearing gutters, moving firewood away from the house, lifting stored wood off the ground and pulling mulch back from siding. Replacing structural timber, rebuilding decks and correcting drainage are contractor tasks, and Washington requires many construction contractors to be registered with the Department of Labor and Industries.

Before hiring anyone for repairs, check their registration on the Department of Labor & Industries site: verify a contractor. Pest control and construction are different trades, and a pest company may not be the right one to rebuild framing.

A sensible order of work keeps repairs from being wasted. First stop the water, then remove or replace the wood, then let the area dry, and only then close it up again. Boarding over damp wood hides the problem and gives the insects somewhere quiet to work.

Our process

How our dampwood termite control visit works

  1. Share what you have found

    A specimen in a jar, a photo of the wood and the date you noticed it all help. A same-day visit is offered only when a technician is free, and no arrival time is promised.

  2. Confirm the insect

    The technician checks whether the insect is a dampwood termite, a subterranean termite, a carpenter ant or something else, because the plans differ. Swarmers and the pattern in the wood are the usual clues.

  3. Trace the moisture

    Roof edges, gutters, downspouts, plumbing, crawl space drainage and grading are checked. WSU stresses ventilation and keeping wood off the soil, so those items head the findings.

  4. Map the damaged wood

    Probing shows how far the damage runs. Softened timber is marked, and structural pieces are separated from trim, fencing and other wood that can be replaced simply.

  5. Agree the plan and the price

    The price is confirmed with you before any work. Options usually run from moisture correction and wood removal to targeted treatment, and the technician explains which fits the findings.

  6. Check that the wood stays dry

    After the repair, a follow-up look shows whether the area has dried and whether activity has stopped. If the damp source remains, you are told that plainly.

King County

Why dampwood termite control is different in Puget Sound

A heavy rainy season is the cause of most of the Puget Sound pattern. From roughly October through March, wood that cannot dry stays wet, and in shaded lots the dry months may not finish the job. Old stumps from cleared lots, retaining walls of timber and low decks near the ground are places to look.

Waterfront and creekside lots add a second source of damp. Properties near Lake Washington, Lake Sammamish and the Sammamish River, and homes close to ravines and greenbelts across Kenmore, Kirkland and Shoreline, often hold moisture against foundations and fences. Timber retaining walls and docks are typical habitat for wet-wood insects.

Kitsap County, reached across Puget Sound, brings wooded and shoreline houses that may stand a good distance from other homes. The company that attends works out access, and you can ask on the phone what is possible where you live.

Where we work

Dampwood Termite Control across King County

Not sure if you're covered? Check your ZIP code.

Related

Termite Inspection

A look at wood, crawl space and foundation for dampwood or subterranean termites, with a plain account of how likely they are here.

Moisture Ant Control

Small yellowish-brown ants in damp wood are a sign of a moisture problem. The fix is the colony and the water that feeds it.

Guides

Read before you book

FAQ

Dampwood Termite Control FAQs

Are dampwood termites common in Seattle?

They are a native insect, and WSU describes them in Washington. No local count is available, and the pest trade often calls termites less common here than in warmer states. An inspection is the way to know about one building.

Can they spread to dry wood in my house?

They generally need wet or rotting wood, according to WSU. Dry, sound wood is not their habitat. The risk is in damp areas, so moisture control matters.

Is the damage serious?

It depends on how much timber is affected and whether it is structural. A post or a patch of trim is a repair job; a large area of joists is more serious. The technician maps the damage so you can see which.

Will you need to open walls?

Only if there is a reason to, and the technician explains that first. Many findings are in crawl spaces, decks and exterior trim, where access does not require demolition.

Is there a way to stop swarmers coming in?

Seal gaps around windows and doors, replace damaged screens and reduce outdoor lighting at night during swarm weeks. These steps are small and help only with the nuisance, not the colony.

How is this different from subterranean termites?

Subterranean termites nest in the soil, may swarm in any month and need a different plan. See termite inspection if you want the building checked for both.