Ferndale Exterior Cedar Has Real Appeal — We're Not Pretending Otherwise
Cedar siding shows up on a lot of homes around Whatcom County, and it's easy to see why. Western red cedar is a regional wood, it weathers to a handsome silver-gray if left unfinished, and a freshly stained cedar-clad home has a warmth that fiber cement or vinyl can't fully copy. It's also a renewable material, and clear vertical-grain cedar has genuine insulating and dimensional qualities that made it a go-to choice for decades of Pacific Northwest construction.
We don't install it anymore, and we think homeowners deserve a straight answer about why — not a sales pitch, not a scare story about "bad wood," just the practical realities of keeping cedar siding sound in the specific climate we work in around Ferndale, Bellingham, and the rest of Whatcom County.
The Climate Cedar Has to Survive Here
Ferndale sits close enough to Bellingham Bay and the Salish Sea that homes catch a steady dose of salt-laden air, on top of the marine rain pattern that defines this whole corner of Washington. Add in the long stretch of fall-through-spring months where surfaces stay damp and shaded, and you get conditions that are genuinely tough on any wood product left exposed to the elements. Moss and algae aren't occasional nuisances here — they're a predictable seasonal event on north-facing walls, under eaves, and anywhere airflow is limited.
Cedar siding can handle short exposure to moisture just fine; that's part of why it was used so widely in this region historically. The problem isn't a single storm — it's the cumulative effect of wet-dry cycling, salt exposure, and shade over years, which is exactly the pattern Whatcom County delivers on repeat.
What This Looks Like on a Wall
- Finish (stain or paint) breaking down faster on the weather-facing and shaded sides of the house than the manufacturer's published recheck interval assumes
- Moss establishing in board overlaps and at butt joints, holding moisture against the wood
- Cupping and checking as boards absorb and release moisture unevenly across their width
- Soft or dark discoloration at the bottom courses near grade, decks, and sprinkler zones
- Nail pops and fastener staining as boards move seasonally
The Maintenance Cycle Is the Real Cost
Cedar siding is not a "finish it once and forget it" product. Manufacturers and finish suppliers generally recommend refinishing solid stain every 3–5 years and semi-transparent stain more often than that, and those intervals assume reasonably favorable exposure. In a climate with our rain volume and moss pressure, homeowners in Ferndale and the surrounding area often find the practical recoat window is shorter than the label suggests, especially on shaded elevations.
That maintenance isn't optional in the way repainting a fiber cement home eventually becomes optional. Skip a cedar recoat cycle or two, and the wood itself — not just the finish — starts absorbing moisture directly. Once that happens, you're not touching up color anymore; you're addressing wood condition.
Cedar Maintenance vs. What We Install Instead
| Factor | Cedar Siding | James Hardie Fiber Cement |
|---|---|---|
| Finish source | Field-applied stain/paint | Factory-baked ColorPlus finish |
| Typical recoat interval | 3–5 years (often shorter in marine climates) | Manufacturer-backed finish warranty, no routine recoat expected |
| Moisture response | Absorbs, swells, cups, checks | Engineered to resist moisture-driven damage |
| Combustibility | Combustible wood product | Non-combustible fiber cement |
| Moss/algae resistance | No inherent resistance | Dense surface resists organic growth better than raw wood |
| Insect/rot vulnerability | Vulnerable if finish fails | Not a food source for wood-destroying organisms |
Salt Air Is Its Own Problem
Coastal proximity changes how fast finishes fail. Salt aerosol accelerates the breakdown of many exterior coatings and can leave a fine residue that holds moisture against a surface between rain events. Homes closer to the water in Whatcom County — including plenty of properties around Ferndale, Birch Bay, and the Bellingham waterfront — see faster finish degradation on cedar than the same product would experience further inland. It's not that cedar "fails" in salt air; it's that the maintenance clock runs faster, and a lot of homeowners don't find that out until the finish is already chalking or peeling.
Moisture, Rot, and What Happens When Finish Fails
Once a cedar board's protective finish breaks down in a spot — a butt joint, a lower course near grade, an area behind foundation plantings — the wood underneath starts to take on moisture directly. Cedar has natural rot resistance compared to many species, but "more resistant" is not "immune," and that resistance is significantly reduced once a board has been repeatedly wetted and dried over years. Once rot or soft spots set in, the fix usually isn't a recoat — it's board replacement, and matching weathered cedar color and grain on a repair is never perfect.
We've simply found that in this specific climate, the long-term outcome for cedar siding depends heavily on how consistently a homeowner keeps up with refinishing — and that's a maintenance burden we don't think is fair to build a warranty or a recommendation around.
Fire Considerations
Cedar is a combustible wood product. That's a straightforward material fact, not a knock on the product — wood siding has been used safely for a very long time. But as wildfire smoke and dry-season fire risk have become a bigger part of summer conversation across Washington, including drier stretches here in Whatcom County, non-combustible exterior cladding has become an easy, low-cost way to reduce a home's fire exposure. It's one more factor that tilted our standard toward fiber cement.
Cost Over the Life of the Siding
Cedar siding materials and installation labor aren't necessarily more expensive than fiber cement up front, and in some cases clear-grade cedar costs more. The real cost difference shows up over 15–20 years, once you add up:
- Multiple professional or DIY refinishing cycles
- Board replacement for isolated rot, cupping, or insect damage
- Moss and algae treatment or pressure washing to protect the finish between recoats
- Labor to prep (scrape, sand, prime) failing finish before each recoat
Fiber cement isn't maintenance-free forever either — it will eventually need repainting decades out, and caulking and flashing need normal upkeep on any siding system. But the interval is much longer, and the factory finish removes the field-applied coating as the weak link.
Why We Standardized on James Hardie Instead
We made a decision as a company to install James Hardie fiber cement siding exclusively, rather than offering cedar, vinyl, LP SmartSide, or other fiber cement brands as options. For a marine climate like ours, the combination that matters most is:
- Non-combustible material — a real difference in a state paying closer attention to wildfire exposure
- ColorPlus factory finish — baked on under controlled conditions, backed by its own finish warranty, instead of depending on field application quality and weather during install
- HZ5 climate-engineered formulation — Hardie's product line built specifically for wetter, colder regions like ours, versus a general-purpose formulation
- Moisture and organic-growth resistance — a dense fiber cement surface that doesn't feed moss, algae, or insects the way untreated or under-maintained wood can
- A strong transferable warranty — reflecting the manufacturer's confidence in the product's real-world durability, not just its lab specs
We install one product line because we can stand behind it fully — the installation methods, the flashing details, the finish behavior — rather than spreading our crews across five different systems with five different failure modes and warranty structures.
If You Already Have Cedar Siding
None of this means an existing cedar-sided home in Ferndale is in trouble. Plenty of cedar exteriors in this county are holding up fine because they've been kept up on a real refinishing schedule. If you're deciding whether to keep maintaining cedar or replace it, a few honest questions are worth asking yourself:
| Question | What It Tells You |
|---|---|
| When was the last full recoat? | If it's past 5–6 years, finish failure and moisture intake are likely already underway somewhere |
| Is there moss on north or shaded walls? | Active moisture retention against the siding, not just a cosmetic issue |
| Any soft spots when you press near the bottom courses? | Possible rot starting near grade or behind plantings |
| Are you willing to commit to recoating on schedule going forward? | Determines whether continued cedar maintenance is realistic long-term |
If the honest answer points toward a replacement conversation, we're happy to walk the exterior with you, point out what we're actually seeing, and explain what a Hardie system would look like on your specific house — no pressure either way.
Getting an Honest Look at Your Siding
Every home and every wall exposure is different — a south-facing wall with good sun exposure behaves differently than a shaded north wall a few feet from a fence line, even on the same house. If you'd like a straightforward assessment of your current siding, or you're planning a replacement and want to understand what James Hardie would cost and look like on your home, we offer a free, no-pressure estimate. Use the form below to get started.