Seattle Trim Repair

Ballard-based · King, Snohomish & Pierce County

Exterior Trim, Siding & Dry Rot Repair in Seattle

Rain, shade, and marine air take a Pacific Northwest exterior apart from the outside in. We find where water is getting behind your siding and trim, cut out everything the rot has reached, and rebuild the wall so the same corner stops failing every few years.

(425) 517-1751 Get a free estimate

Mon–Fri, 7:00am – 5:00pm · Free estimates

  • We trace the leak back to its source instead of caulking over it.
  • Rot comes out past the damage line, then the wall gets rebuilt — not patched.
  • James Hardie® fiber cement, Western Red Cedar, and LP SmartSide®.

Get your free estimate

Tell us what is going on with your trim, siding, or rot and we will get you a free estimate — most jobs are scheduled the same week.

No obligation. We reply Mon–Fri, 7:00am – 5:00pm. In a hurry? Call (425) 517-1751.

Licensed and insured James Hardie preferred contractor 20+ years Free estimates Same-week scheduling James Hardie preferred contractor badge

Four ways we keep water out of your walls

Most jobs start as one soft board and end somewhere behind the siding. Whichever door you come in, the work is the same: find the source, remove what has failed, and rebuild it with something that survives this climate.

Seattle Trim Repair technician inspecting damaged siding on a Seattle home

Siding Repair

Surgical repairs that restore your home's protective envelope.

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Close-up of fascia board and soffit trim being inspected for rot damage

Exterior Trim Repair

Restoring the critical seals that protect your home's envelope.

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Close-up of cubical cracking pattern characteristic of dry rot in wood trim

Dry Rot Repair

Eradicating the fungal threat that destroys your home's structure.

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Professional siding installation crew working on a Seattle home exterior

Siding Installation

A meticulous process that delivers lasting protection and beauty.

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Why Seattle homes rot from the outside in

More than 150 rain days a year, marine air off Puget Sound that keeps humidity high long after the rain stops, and a tree canopy dense enough that north-facing walls can stay damp for weeks. Wood does not fail here because of one storm. It fails because it never gets enough consecutive dry days to recover.

That is why a hairline gap at a window casing is not cosmetic. Water travels behind the trim into the sheathing and framing, where nobody sees it until a wall feels soft or paint stops holding. Seattle Trim Repair has spent 20+ years working on exactly these walls, which is why the first thing we do is find the water — not the fastest board to replace.

How we remediate dry rot

Rain falling across a Pacific Northwest street, the weather that drives exterior wood rot in Seattle

Rot in exterior wood

Rain works into end grain, nail holes, and open joints, and the wood never gets enough dry days to recover. The fungus behind dry rot needs that moisture to start, then keeps eating the cellulose long after the wall has dried — leaving soft, crumbling spots and a squared-off, cubical cracking pattern.

Water-damaged fascia and casings

Dark streaks under a window or a sill that feels soggy mean water is sitting where it should not. When fascia rots it stops holding the gutter, the gutter sags, and the overflow starts running straight down the wall it was meant to protect.

Warped and cupped boards

Temperature swings distort trim that is already carrying moisture, especially in flat, shaded, fog-holding pockets like Fremont and on the wind-exposed slopes of Magnolia. Bowed or bubbling siding usually means water is trapped behind the panel, not on it.

Weather-driven failures

Wind gets behind panels that were never nailed correctly and tears them loose. Blocked or decayed soffits shut down attic airflow, so heat builds in summer and ice dams form in winter. Both start as small breaches and end as sheathing repairs.

Not sure whether it is rot or just old paint?

Describe what you are seeing — a soft sill, a dark streak under a window, siding that moves when you push it — and we will tell you whether it is a patch, a section, or something structural before anyone comes out.

Mon–Fri, 7:00am – 5:00pm

(425) 517-1751

Real projects on real Seattle homes

Fascia and soffit rebuilds, cedar soffits, shingle and lap siding, trim run back to square. These are photos from finished work, not stock images.

See the full gallery
  • Completed lap and board-and-batten siding with cream corner boards and window trim on a Pacific Northwest home
  • Shingle siding with rebuilt gable trim, window casing and garage header trim in bright Seattle sun
  • Curved turret with cedar soffit, dentil detailing and painted window casings on a Seattle home
  • Western Red Cedar soffit ceiling framed around a skylight opening on a covered exterior
  • Cedar-clad entry alcove meeting smooth fiber cement panel on a modern Seattle exterior
  • Tongue-and-groove soffit ceiling being installed over a covered patio, miter saw set up on site

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Where we work

Six cities across King, Snohomish & Pierce County, run out of the Ballard office at 8338 20th Ave NW. Pick your city and service, or jump straight to your Seattle neighborhood.

Seattle neighborhoods we work in

Three materials that hold up here

What we rebuild with depends on the wall, the exposure, and how the rest of the house is detailed. These three are what we specify for Puget Sound exteriors, and each one behaves differently once the wet season starts.

  • James Hardie Fiber Cement

    A composite of cement, sand, and cellulose fibers engineered to resist rot, pests, and fire. The gold standard for durability in wet Pacific Northwest climates.

    Fiber Cement details

  • Western Red Cedar

    The classic choice for Pacific Northwest homes. Cedar contains natural oils that resist rot and insects, delivering authentic warmth and elegance that synthetic materials cannot replicate.

    Cedar details

  • LP SmartSide Engineered Wood

    Wood strands and resins treated with zinc borate for superior rot and pest resistance. Combines the authentic beauty of wood with modern durability and lower maintenance than cedar.

    Engineered Wood details

Weighing vinyl too, or trying to price the difference? Compare all four siding materials.

Current offer

$200 off any siding or trim repair over $2,500

Mention this page when you call or request your estimate. It comes off the quoted price for qualifying siding and trim repairs — the inspection and the estimate are free either way, whether or not the job ends up over that threshold.

Same-week scheduling · Licensed and insured

Tell us what is failing

No obligation. We reply Mon–Fri, 7:00am – 5:00pm. In a hurry? Call (425) 517-1751.

Questions Seattle homeowners ask first

What counts as exterior trim, and what do you actually repair?
Exterior trim is every board that seals the seams of your house: fascia along the roofline, soffits under the overhang, window and door casings, corner boards, rake boards, and sills. We repair or replace all of it — and the siding and sheathing behind it when water has already worked through. Full scope on the exterior trim repair page.
How do I tell weathered paint from actual dry rot?
Press the board with a screwdriver. Sound wood pushes back; rotted wood sinks in, feels spongy, or crumbles into dry, brittle pieces. Dry rot also leaves a distinctive cubical cracking pattern as the fungus consumes the cellulose, and it often smells like damp mushrooms before anything is visible. Peeling or bubbling paint on its own is not proof of rot — it means moisture is already behind the board, which is the moment to look. More in dry rot repair.
Can my siding be repaired, or does the whole wall need replacing?
If the damage is confined to a specific area and the rest of the wall is structurally sound, repair is the right call — we pull the failed panels, inspect the sheathing and weather barrier behind them, and install matched replacements. When siding is failing across multiple walls or has reached the end of its service life, replacement is the better long-term investment. We tell you which one you are looking at before you commit. Compare siding repair and siding installation.
How do you price a repair?
There is no flat rate, because no two rot repairs are the same size once the trim comes off. We inspect first, then quote a fixed price for the work we found — including the substrate repair behind the siding, not just the board you can see. Estimates are free, there is no obligation to book, and there are no costs added quietly later.
Which cities and Seattle neighborhoods do you cover?
We work out of Ballard and cover Seattle plus Bellevue, Kirkland, Redmond, Bothell, and Tacoma — King, Snohomish, and Pierce County. Inside Seattle there are dedicated pages for twenty neighborhoods, from Ballard and Queen Anne to West Seattle and Columbia City. Scheduling is typically same-week.

Recent guides

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Get the rot looked at before the wall behind it goes

Send a few details or call and describe what you are seeing. We will tell you what it is, what it takes to fix, and what it costs — before anything gets torn off.

(425) 517-1751 Free Estimate

Mon–Fri, 7:00am – 5:00pm · Free estimates · Same-week scheduling

(425) 517-1751 Free Quote