Fascia Rot in Seattle: How Failing Gutters Quietly Destroy Your Home
Fascia is the 1×6 or 1×8 wood board that runs along the bottom edge of your roofline and holds your gutters. You almost never look at it directly. It sits tucked up under the eaves, usually painted to match the trim, hidden behind the gutter itself. And that's exactly why, across Bellevue, Kirkland, Sammamish, Renton, and most of the Eastside, fascia rot is the hidden cost we uncover on roughly one out of every three jobs. Most of the time, the homeowner had no idea.
This guide explains what fascia rot is, how failing gutters cause it in the PNW climate, how to check your own fascia from the ground and from a short ladder in under ten minutes, what it costs to fix at each stage, and why waiting even one more winter can triple the bill.
What fascia is and why you never notice it
Fascia is the final structural board at the edge of your roof. It caps the ends of the roof rafters, provides a flat surface for your gutters to mount to, and — together with the soffit below — closes off the underside of the eaves. In the Seattle area, most homes built before 2005 use painted 1×6 or 1×8 cedar or hem-fir for fascia, because those species handle moisture reasonably well. Reasonably well is not forever.
Fascia isn't visible from a normal walk around the house because it's usually hidden behind the front lip of the gutter. The only way to see it clearly is to take the gutter down — which nobody does until something's wrong. By the time you notice the problem, the wood is often already rotted.
How failing gutters rot your fascia
Fascia rot in the Puget Sound region always comes down to the same mechanism: water sitting against the wood for too long. Here's the sequence we see on nearly every rotted-fascia tear-off in Bellevue and Kirkland:
- The gutter develops a leak, a sag, or a miter failure. Water starts escaping behind the gutter instead of flowing to the downspout.
- Water runs down the back of the gutter onto the fascia. The space between the gutter and the fascia is dark, poorly ventilated, and stays wet for weeks at a time during the October-to-March wet season.
- Moss and organic debris accumulate under the hanger brackets. This is the accelerator. Moss holds water directly against the fascia and extends the wet-cycle by weeks at a time.
- The outer fibers of the cedar or hem-fir saturate and soften.You can press on it with a finger and feel it give. At this stage, paint is usually still intact — which is why you don't notice from the ground.
- Fungal decay sets in. Within one full PNW wet season of saturation, wood-decay fungi start breaking down the cellulose. The wood turns spongy, then crumbly.
- The hangers lose their grip. Hidden hangers screw into the fascia. If the wood is rotted, the screws spin free. The gutter starts to sag, which changes the pitch, which causes more overflow, which accelerates the rot.
- Water reaches the rim joist. This is the point where a fascia problem becomes a structural problem. The rim joist is part of the house frame, and repairing it is carpentry, not cosmetic work.
How to check your own fascia in 10 minutes
You don't need a contractor for the first check. You need good light, a short ladder, a flashlight, and a finger. Walk the perimeter of your house and run this inspection on every stretch of fascia you can safely reach. If you can't safely reach some of it — mark those runs and hire the check out.
- Look for dark staining along the bottom edge of the fascia.Visible from the ground. Dark streaks, especially at the miter corners, mean water has been running down the wood. It's almost always a leaking miter or a bad-pitch overflow.
- Look for paint failure.Bubbling, peeling, or blistered paint on the fascia is a reliable early sign of moisture underneath. Don't dismiss it as a paint problem — it almost never is.
- Set up a short ladder at one of the suspect spots. Lean the ladder against the wall — never against the gutter itself, which can bend under the load and dump you.
- Press on the fascia with a firm finger. Through the paint. If the wood is sound, it feels rock-hard. If it gives even slightly — if your finger leaves an impression, or if you hear a soft crunch — the wood underneath is already rotted.
- Look behind the gutter with a flashlight if you can.Where the top of the gutter meets the bottom of the fascia, shine a light straight up into the gap. You're looking for moss, dark staining, or the dry powdery look of wood-decay fungus.
- Check the hangers individually. From the top, push down gently on the gutter next to each hidden hanger. If the gutter gives more than about 1/4 inch, that hanger is loose — usually because the fascia behind it can no longer hold the screw.
What fascia repair costs by stage
Here's the honest cost curve we quote for fascia work in the Seattle area in 2026. These prices assume the gutter itself is sound and can be reused — if the gutter also has to come down, add that separately.
| Service | Price range | Notes |
|---|---|---|
| Stage 1: Localized soft spot (1–3 LF) | $275–$500 | Treat, patch, prime, repaint. Usually same-day. |
| Stage 2: One full board replacement (6–10 LF) | $450–$900 | Remove gutter section, replace 1×6 cedar or hem-fir, reinstall |
| Stage 3: Multiple board replacement (20–40 LF) | $1,200–$2,500 | Often with gutter replacement on affected runs |
| Stage 4: Extensive rot + rim joist damage | $4,000+ | Structural carpenter required; gutter work is secondary |
| Fascia inspection only (no repair) | $275 | Applied to any repair work we do same day |
The jump from Stage 3 to Stage 4 is where homeowners lose the most money by waiting. Stage 4 isn't just a bigger version of Stage 3 — it's a categorically different job involving structural repair and sometimes a building permit. The EPA's mold guidance also flags that prolonged saturation of framing lumber creates conditions for hidden mold growth behind walls, which is a whole separate remediation problem.
Not sure if your fascia is rotting? Send us a photo.
Text us one photo of the front of the gutter and one taken from the ground looking straight up at the fascia. We'll tell you whether it needs a check now, an inspection soon, or can wait till spring. Free.
How to prevent fascia rot in the first place
Prevention is straightforward and cheap compared to the repair curve above. These are the four things that keep fascia dry in a PNW climate:
- Keep the gutters clean. This is 90% of prevention. A clear gutter that drains to the downspout never overflows onto the fascia. See our Douglas fir maintenance schedule for the right cleaning frequency in Seattle.
- Fix corner overflow immediately.Corner overflow dumps water onto the fascia at exactly the worst spot. It's almost always a pitch problem or a clog — $400 to fix, $4,000 to ignore.
- Seal leaking miters with butyl, not silicone. Silicone fails in PNW temperature swings within two years. Butyl gutter sealant holds for a decade.
- Make sure your gutter has a proper pitch to the downspout. Water should flow through the gutter, not sit in it. Standing water is the single biggest predictor of fascia rot we see in the field.
If you're already in the repair territory, the best move is to address both the fascia and the gutter cause in the same visit. Patching the fascia without fixing the overflow that caused it just buys you another two winters. See our repair-vs-replacement decision guide for how we approach that combined job.
Worried about fascia rot? Book a 20-minute inspection.
We'll come out, run the finger-press test on every reachable stretch, photograph any issues, and quote a fix if needed. $275 for the inspection — applied to the repair cost if we do the work same day.
Related reading: Why Seattle gutters fail faster than anywhere else · Gutter repair vs. replacement decision guide · Our gutter repair service
Frequently asked questions
How do I know if my fascia is rotting behind the gutters?
The best test is a firm finger press on the fascia board through the paint. If the wood feels rock-hard, it's sound. If it gives at all, if you can leave an impression, or if you hear a soft crunch, the wood underneath is already rotted. Early warning signs visible from the ground include dark staining under miter corners, peeling paint on the fascia, and any gutter section that sags or pulls away from the wall.
How much does fascia repair cost in Seattle in 2026?
Cost depends on stage. A localized soft spot (1–3 LF) runs $275–$500. One full board replacement (6–10 LF) is $450–$900. Multiple boards (20–40 LF) is $1,200–$2,500. Once the damage reaches the rim joist, it becomes a structural repair at $4,000+ and needs a carpenter rather than a gutter crew. Waiting from Stage 1 to Stage 4 typically takes 3–4 Seattle wet seasons.
What causes fascia rot behind gutters in Seattle?
The root cause is always water sitting against the wood for too long. It starts with a gutter leak, sag, or miter failure that lets water escape behind the gutter. Moss and debris accumulate under the hanger brackets and hold the water against the wood directly. Within one to two PNW wet seasons, the outer wood fibers saturate, soften, and start to rot. It's the number-one hidden failure mode we find on Seattle homes over 15 years old.
Can I fix fascia rot myself?
Stage 1 localized soft spots — sometimes yes, if you're comfortable on a ladder and good with a drill. Clean out the soft area, treat with a wood hardener, patch with an exterior epoxy, prime, and repaint. Anything larger than a few inches square is a board replacement, which means taking down the gutter section, prying off the old 1×6, cutting and installing the new board, and reinstalling the gutter. That's a professional job in most cases.
How long does it take for fascia to rot completely?
In the PNW climate, the full sequence from a first water leak to structural damage in the rim joist typically takes two to four wet seasons. Stage 1 soft spots appear within one winter of a gutter problem. Full board failure and loose hangers by year two or three. Rim joist damage by year three or four if the overflow continues. Each stage roughly doubles the repair cost.
Should I replace the fascia and the gutters at the same time?
Almost always yes. Once the fascia is rotted enough to replace multiple boards, the gutters have to come down anyway, and the incremental cost of new gutters on the same visit is small compared to scheduling a second job later. We typically recommend .032 aluminum seamless on the new runs, which is 18% thicker than the builder-grade .027 most Seattle installers use.