Seattle Trim Repair

Dry Rot Repair in Seattle

Seattle averages around 155 rainy days a year and humidity that regularly sits above 60 percent, which is roughly the ideal operating environment for wood-decay fungi. Rot here is not a freak event; it is what happens to any untreated water path given a couple of winters. The job is finding the path, not just the damage.

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Dry Rot for Seattle homes

Seattle Trim Repair is based in Ballard and serves homeowners throughout Seattle's diverse neighborhoods. From historic Craftsman bungalows to modern construction, each area of the city presents unique exterior maintenance needs shaped by Pacific Northwest weather and varied architectural character.

The general approach is the same everywhere we work — you can read the full dry rot process on the main service page. What changes in Seattle is where the damage starts and how far it usually runs before anyone notices.

Seattle housing stock

Seattle's housing stock ranges from turn-of-the-century Craftsman homes and 1900-1940 box houses in neighborhoods like Ballard, Wallingford, and Capitol Hill to modern construction in South Lake Union and the U-District. Coastal neighborhoods like Magnolia and West Seattle feature homes with significant marine exposure, while North Seattle areas showcase mid-century ramblers and newer infill development.

What the weather does here

Seattle receives approximately 155 rainy days annually with year-round moisture from Puget Sound. Coastal neighborhoods like Magnolia and West Seattle face wind-driven rain and salt air off the Sound, while inland areas like Ravenna and Wedgwood experience persistent dampness from the marine layer. Lake Washington neighborhoods see humidity from the lake, and shaded areas throughout the city struggle to dry out between rain events.

Where Seattle homes fail first

  • Window and door frames

    The most frequent starting point on Seattle houses, and the one homeowners spot first. Cracked or peeling paint at a Queen Anne or Capitol Hill window frame is usually the fungus announcing itself from underneath. We probe and meter the frame rather than judging by the paint.

  • Siding, sheathing, and the wall behind

    Once rot is in the cladding on a Ballard or Ravenna elevation, the question is whether it has reached the sheathing and the framing. That answer decides whether this is a day of carpentry or a structural repair, and it is not something you can determine from outside the wall.

  • Decks, rooflines, and stalled ventilation

    Deck ledgers, roof spaces with poor airflow, and the shaded elevations near Alki and along the western edge of the city are the three places we find advanced rot most often. A musty odour in the roof space is often the only symptom before something visibly fails.

What we rebuild with

Three materials, chosen for how they behave in King County weather rather than for what is quickest to install.

Getting to you in Seattle

Seattle Trim Repair is based at 8338 20th Ave NW in Ballard. Our office is located at 8338 20th Ave NW in the Ballard neighborhood of Seattle. We serve all Seattle neighborhoods with same-week scheduling.

Familiar ground for us here includes Space Needle, Pike Place Market, Green Lake Park, Lake Union, Kerry Park and Gas Works Park.

Seattle ZIP codes we cover

  • 98117
  • 98103
  • 98107
  • 98115
  • 98105
  • 98102
  • 98112
  • 98122
  • 98119
  • 98199
  • 98116
  • 98136
  • 98126
  • 98125
  • 98133

Something on your Seattle house you cannot identify?

Send a photo or describe what you are seeing from the ground. We will tell you what usually sits behind it before anyone comes out.

Mon–Fri, 7:00am – 5:00pm

(425) 517-1751

Seattle neighborhoods we cover

Each neighborhood above has a local page for the exterior work we do there. If your street is not listed it is still covered from here — call and we will talk it through.

Dry Rot Repair in Seattle: common questions

How fast does dry rot spread in Seattle?
Faster than most homeowners expect. The fungus is active whenever wood moisture sits above roughly 20 percent, and in this climate exterior wood rarely drops below that between October and May. Damage that starts in a window sill can be into the sheathing within a season or two if the water source is still running.
Can I just replace the wood that looks rotten?
No, and this is the mistake that turns a small repair into a repeat visit. The fungal network runs beyond the wood that has visibly failed. We remove the infected material plus a margin of sound wood, treat the surrounding area with a professional-grade fungicide, and only then rebuild.
How do you actually find dry rot in a Seattle house?
Visual inspection of the high-risk details, probing anywhere the wood sounds or feels wrong, and a moisture meter across the surrounding area to map how far the wet zone extends. The meter is what separates a real diagnosis from a guess, because saturated wood reads long before it looks damaged.
Do you fix the leak as well as the rot?
That is the first step, not an add-on. Removing rot without eliminating the water source guarantees it comes back in the same place. We identify the failed flashing, the overflowing gutter, or the open joint that caused it, and correct that before any new material goes on.

Dry Rot in nearby cities

Free dry rot estimate in Seattle

No obligation, no pressure, and a straight answer on whether this is a repair or something bigger. $200 off any siding or trim repair over $2,500 — mention this page when you call or request your estimate.

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