Ferndale Cedar Has Earned Its Reputation — For Good Reasons
Cedar siding didn't become a Pacific Northwest staple by accident. It's a real wood product with a genuine grain, it takes stain beautifully, and there's a warmth to a cedar-clad home that manufactured products spend a lot of marketing budget trying to imitate. Western red cedar in particular has natural oils that resist decay and insects better than most other softwoods, and a well-built cedar home can look stunning for years. We're not here to trash the material. We're here to explain why, after years of doing exterior work in Ferndale and around Whatcom County, we stopped installing it.
The short version: cedar is a maintenance commitment, not a one-time purchase, and this particular climate — salt air off Bellingham Bay and the Strait of Georgia, driving rain off the water, and a moss season that can run eight or nine months of the year — is about as hard on wood siding as it gets in the continental U.S.
What "Maintenance" Actually Means Over 20 Years
Homeowners hear "cedar needs maintenance" and picture an occasional touch-up. The reality is more involved than that, and it compounds if you fall behind even one cycle.
The Realistic Cycle
- Cleaning: annual or biannual wash to remove moss, mildew, and pollen buildup before it stains or feeds into the wood grain
- Refinishing: stain or solid-body finish reapplied roughly every 3-7 years depending on exposure, sun, and product used
- Caulk and sealant checks: joints, butt seams, and trim intersections need inspection every year or two
- Spot repair: split boards, cupped boards, and nail pops need to be caught and fixed before water gets behind them
- Full strip-and-refinish: eventually the finish has to be stripped back to bare wood and restarted, which is a much bigger job than a routine recoat
None of this is unusual for wood siding anywhere. What changes the math in Ferndale is how much faster the clock runs. A finish cycle that might stretch to 7-8 years in a dry inland climate can shrink to 3-4 years on a house that's catching onshore moisture and shade-grown moss most of the year.
Why the Whatcom County Climate Is Specifically Hard on Cedar
Salt Air
Proximity to the water means airborne salt settles on exterior surfaces. On wood siding, that salt draws moisture into the grain and accelerates finish breakdown, especially on the weather-facing elevations of a home.
Driving Rain
Ferndale doesn't just get a lot of rain — a good share of it comes in sideways on wind off the Strait. That drives water into lap joints, butt seams, and any hairline crack in the finish, which is exactly where wood siding fails first: not on the open face of a board, but at the edges and fasteners.
Extended Moss and Mildew Season
Mild, wet, low-sun winters are ideal moss conditions. Moss holds moisture directly against the siding surface for months at a stretch, which is a slow but steady path to rot on any wood-based product, cedar included. North-facing walls and anything shaded by trees or a neighboring structure are the first to show it.
Freeze-Thaw Cycling
Whatcom County doesn't get brutal winters, but it does get enough freeze-thaw swings that trapped moisture in wood siding can crack a finish coat or split a board over a few seasons, opening the door to deeper water intrusion.
Where Cedar Fails in Practice
When we've assessed older cedar-sided homes in this area, the failure pattern is consistent: it's rarely the whole wall. It's the specific spots where water sits or gets trapped — under window sills, at the bottom courses near grade, behind gutters that overflow, and on shaded elevations where moss has been left to grow. By the time a homeowner notices soft or dark boards, the damage is often already into the sheathing behind it, not just the siding itself.
This is the core problem with wood as a siding material in this climate: the finish is the only thing standing between the wood and the weather, and that finish is degrading from day one. Miss a maintenance cycle or two — which happens constantly, because most people don't think about siding until something looks wrong — and you're not just refinishing, you're replacing boards, or worse, sheathing.
Cedar vs. James Hardie: The Honest Comparison
| Factor | Cedar Siding | James Hardie Fiber Cement |
|---|---|---|
| Base material | Natural wood | Cement, sand, cellulose fiber |
| Moisture absorption | Absorbs and swells; primary failure driver | Engineered to resist moisture-related swelling and cracking |
| Finish lifespan | 3-7 years before recoat needed | ColorPlus factory finish backed by a long-term finish warranty |
| Moss/mildew resistance | Vulnerable, especially shaded elevations | Cleans off a stable, non-porous painted surface far more easily |
| Combustibility | Combustible | Non-combustible |
| Insect vulnerability | Some natural resistance, not immune | Not a food or nesting source |
| Ongoing labor cost | Recurring cleaning, staining, and repair | Occasional wash; no refinishing cycle |
| Warranty structure | Typically none beyond initial installer workmanship | Manufacturer-backed, transferable product warranty |
None of this means cedar is a bad product in the abstract — plenty of it is still standing on homes built decades ago. But it means cedar puts the ongoing burden on the homeowner: the material only performs as well as the maintenance schedule behind it, indefinitely, for as long as you own the house.
Why We Standardized on James Hardie Instead
We made a decision a while back to install James Hardie fiber cement exclusively, and cedar's maintenance demands in this specific climate were a big part of that call. Hardie's HZ5 product line is engineered for exactly the conditions Whatcom County throws at a house — moisture cycling, humidity, and coastal exposure. It doesn't absorb water the way wood does, it doesn't feed moss and mildew the way a porous wood surface does, and the ColorPlus factory finish is baked on under controlled conditions rather than applied on-site and left to weather.
Practically, that means:
- No refinishing cycle — the factory finish is engineered to hold color and integrity for a long stretch without repainting
- Non-combustible, which matters both for insurance considerations and peace of mind
- A real transferable warranty backing both the substrate and the finish, not just our installation labor
- Dimensionally stable boards that don't cup, split, or swell the way wood siding can with repeated wetting and drying
- Far less vulnerability to the moss and mildew that this climate produces on shaded, damp elevations
We're not claiming Hardie is zero-maintenance forever — no siding product truly is, and correct installation (proper flashing, clearance, and fastening) matters as much as the material itself. But the maintenance burden is dramatically lower, and the failure mode of "we fell behind on refinishing and now there's rot" simply isn't a risk with fiber cement the way it is with wood.
If You Already Have Cedar Siding
We're not going to tell you to rip out cedar that's in decent shape. If your cedar siding is sound, here's what actually protects it in this climate:
- Keep gutters clean and functioning so water isn't overflowing onto wall sections below
- Wash moss and mildew off at least once a year, especially on north-facing and shaded walls
- Don't let vegetation grow up against the siding — it traps moisture and blocks airflow
- Recoat on schedule rather than waiting until the finish visibly fails
- Inspect the lowest courses near grade and any spot under a window sill or downspout closely — these fail first
- Address split or cupped boards immediately rather than waiting for the next maintenance pass
If you're already several years behind on refinishing, or you're seeing soft spots, dark staining that won't wash off, or boards that are visibly cupping, that's usually the point where a real conversation about replacement — rather than another round of maintenance — makes financial sense.
Making the Right Call for Your Home
Cedar siding isn't a scam or a bad product — it's a wood product asking to be maintained like one, in a climate that makes that maintenance harder and more frequent than almost anywhere else in the country. Whether that trade-off is worth it depends on how much time and money you want to put into siding upkeep over the years you own the house. For us, after seeing how this specific combination of salt air, driving rain, and moss season wears down wood finishes, fiber cement was the clear standard to build our business around.
If you're weighing a cedar refinish against a full replacement, or just want an honest look at what condition your current siding is really in, we're happy to come take a look. We'll give you a straight answer — even if that answer is "your cedar's got some life left in it." Reach out for a free, no-pressure estimate.