Birch Bay Cedar Siding Has a Real Appeal
We'll start with the honest part: cedar siding looks good. Real wood grain, warm color, a material that ages the way a lot of homeowners picture a Pacific Northwest home aging — silvery and weathered, or stained a deep cabin brown. Western red cedar grows in our region, it's rot-resistant compared to most softwoods, and it has a long history on homes up and down Whatcom County. If you've ever asked why a Birch Bay siding contractor wouldn't want to install it, that's a fair question, and it deserves a real answer instead of a sales pitch.
We don't install cedar siding. Not because it's a bad material in the abstract, but because of what happens to it specifically in our climate, over the specific timeline homeowners actually live in their houses, with the specific maintenance schedule most people are realistically willing to keep up. Here's the honest breakdown.
What Cedar Gets Right
- Natural rot resistance — cedar's natural oils do slow decay better than pine, fir, or spruce.
- Authentic wood look — no composite or fiber cement product replicates real wood grain exactly, because it isn't real wood.
- Lightweight and workable — cedar is easy to cut, shape, and install around trim details.
- Renewable material — as a wood product, cedar comes from a managed, renewable resource.
If cedar siding lived somewhere dry, with moderate humidity and homeowners who repainted or restained every two to three years without fail, a lot of our concerns below would matter less. That's not the environment on this coastline.
The Birch Bay Climate Problem
Birch Bay sits right on the water, which means siding here deals with three things at once: salt-laden air off the bay, long stretches of driving rain, and a moss and algae season that can run most of the year in shaded, north-facing exposures. Whatcom County doesn't get brutal winters, but it makes up for that with near-constant moisture exposure — and moisture, not cold, is what actually breaks down exterior wood siding.
Salt Air and Wood Fiber
Salt air accelerates the breakdown of finishes on wood siding faster than it does inland. A paint or stain film that might hold five to seven years in a drier climate can start failing in three to four years within a mile or two of the water. Once the finish starts to go, the wood underneath is exposed, and cedar without an intact protective coating starts absorbing moisture unevenly — which is where the real problems begin.
Driving Rain and Moss
Wind-driven rain off the Strait pushes water into laps, seams, and end grain in ways that vertical rain doesn't. Combine that with shaded north and east elevations that stay damp for days after a storm, and you get ideal conditions for moss and algae growth on wood siding. Moss holds moisture against the surface, which is exactly what accelerates rot in cedar boards, especially near the ground, under eaves with poor overhang, and at inside corners.
The Maintenance Burden Homeowners Actually Face
This is the core of why we stopped installing it. Cedar siding is not a one-time investment the way a lot of homeowners picture it when they choose the material. It's an ongoing maintenance commitment, and in a marine climate like ours, that commitment is more frequent and more expensive than most people plan for.
| Maintenance Task | Cedar Siding (Coastal Climate) | Fiber Cement (Hardie) |
|---|---|---|
| Refinishing (paint/stain) | Every 3–5 years | Factory finish rated 15+ years before repaint |
| Caulk/seam inspection | Annually | Periodic, far less critical to moisture control |
| Moss/algae treatment | Recurring, especially shaded elevations | Occasional wash, resists moisture intrusion |
| Board replacement risk | Ongoing where rot develops at seams/ends | Rare when installed to spec |
| Insect vulnerability | Present, especially once finish fails | None — cement-based, not organic |
None of this means cedar "fails" on a house. It means cedar asks for a level of upkeep that has to actually happen, on schedule, for the material to perform the way it's marketed. Skip a refinish cycle or two — which happens constantly, because life gets in the way — and the clock on moisture damage starts running.
How Moisture Actually Damages Cedar Siding
Cedar doesn't fail all at once. It fails in specific, predictable spots, and once you've seen the pattern on enough homes it stops being a mystery:
- End grain at butt joints — the cut ends of boards absorb water far faster than the face grain, and this is where rot most often starts.
- Cupping and checking — repeated wet/dry cycles cause boards to cup or crack, which then opens new paths for water intrusion.
- Nail staining and popping — moisture cycling works fasteners loose over time, and standard fasteners can bleed and stain the finish.
- Behind-siding moisture — if house wrap and flashing details aren't perfect, trapped moisture rots cedar from the back side, invisible until the damage is advanced.
That last point matters more than most homeowners realize: a lot of cedar siding failure isn't visible from the street. It's happening behind the boards, and by the time it shows, you're often looking at sheathing repair, not just siding replacement.
Installation Sensitivity
Cedar siding is genuinely more installation-sensitive than fiber cement, and this is where a lot of the material's reputation gets undeserved damage. Correctly installed cedar needs back-priming on every cut end, careful fastener selection to avoid staining, precise gapping for expansion and contraction, and flawless water-shedding details at every seam. Get any of that wrong — which happens often, because it's labor-intensive and easy to rush — and you've shortened the material's real-world life dramatically, even though the siding itself was never the problem.
We'd rather not put a product on a house where a small installation shortcut, ours or a future repair crew's, turns into a moisture problem five years down the road that's difficult to trace back to its source.
Cost Over the Life of the Siding
| Cost Factor | Cedar | Hardie Fiber Cement |
|---|---|---|
| Material cost upfront | Moderate to high | Moderate |
| Refinishing cost (per cycle) | Significant, recurring every 3–5 years | None until factory finish ages out, 15+ years |
| Repair/replacement risk | Higher in marine exposure | Low when installed correctly |
| Insurance considerations | Combustible material | Non-combustible, can factor into coverage |
| Realistic 20-year cost | Often exceeds initial estimate due to upkeep | More predictable, front-loaded |
Cedar can look competitive on day one. It rarely looks competitive on a twenty-year timeline once refinishing labor and occasional board repair are counted honestly.
Why We Install James Hardie Instead
We standardized on James Hardie fiber cement siding because it addresses the specific problems cedar runs into on this coastline. It's non-combustible, which matters both for wildfire-adjacent risk and for insurance conversations. It comes with a factory-applied ColorPlus finish that's engineered to hold color and resist fading for far longer than field-applied paint or stain. And Hardie's HZ5 product line is specifically engineered for climates like ours — freeze-thaw cycling, high moisture exposure, and coastal conditions — rather than a general-purpose product asked to perform in a marine environment it wasn't designed for.
Fiber cement doesn't rot, doesn't feed insects, and doesn't need the seasonal maintenance rhythm that cedar demands. When it's installed correctly — proper flashing, correct fastener placement, manufacturer-specified gapping — it's a material we're comfortable standing behind with a real transferable warranty, on a coastline where we've watched what salt air and driving rain do to less suited materials over time.
What We Look For in a Siding Material
- Performs in salt air without accelerated finish failure
- Resists moisture intrusion at seams and cut edges
- Doesn't require a recurring refinishing schedule to stay protected
- Non-combustible
- Backed by a manufacturer warranty that's actually transferable to a future homeowner
- Forgiving enough during installation that a small field error doesn't become a five-year moisture problem
Cedar checks some of these boxes. It doesn't check enough of them, consistently, in Birch Bay's specific climate, for us to put our name behind the installation.
If You Already Have Cedar Siding
If your home currently has cedar siding, that's not a crisis — it just means paying attention to the maintenance items above, particularly refinishing on schedule and watching butt joints and shaded elevations for early signs of moisture damage. When cedar does reach the point of replacement, that's usually when homeowners start asking what we'd put on the house instead, and it's a conversation we're glad to have honestly, without pushing a product that isn't right for the situation.
If you're weighing cedar against other options, or your existing cedar siding is starting to show its age, we're happy to take a look and talk through what we're seeing — no pressure, no sales script. Reach out for a free estimate and we'll give you a straight answer about what your siding actually needs.