Bellingham Cedar Has a Real Appeal
Western red cedar is a beautiful material, and it's a natural choice to consider here — Whatcom County has been surrounded by it for generations. Cedar siding has a warmth and depth that manufactured products spend a lot of engineering trying to imitate. Cedar shakes and clapboards can look genuinely great on the right house, and there's nothing dishonest about a homeowner wanting that look.
But wanting the look and understanding the ongoing commitment are two different things. As a contractor, we made a decision years ago to stop installing cedar siding on Bellingham homes. Not because cedar is a bad material — it's because of what it actually takes to keep cedar looking good and performing well in this specific climate, and because we didn't want to hand a homeowner a maintenance schedule most people underestimate at the time of installation.
Why Cedar Struggles in This Climate Specifically
Bellingham sits in a spot where three things stack against wood siding at once: salt-laden marine air off the Sound, long stretches of driving rain, and a moss and algae season that can run most of the year on shaded or north-facing walls. Cedar is naturally rot-resistant compared to other softwoods, but "resistant" is not "immune," and none of that resistance holds up without consistent upkeep.
- Moisture cycling: Cedar boards absorb and release moisture with every wet-dry cycle. In a climate where it can stay damp for days or weeks at a stretch, that cycling is more frequent and more prolonged than in drier regions, and it's what drives most of cedar's long-term movement.
- Cupping, checking, and warping: As boards repeatedly swell and shrink, they can cup, twist, or develop surface checking (small splits along the grain). This is normal aging for wood, but it accelerates in high-moisture environments and opens up new points where water can get behind the board.
- Moss and algae growth: Whatcom County's shaded, damp microclimates are close to ideal conditions for moss and algae to colonize wood surfaces. Once established, they hold moisture against the siding and require physical cleaning and treatment — not just a rinse — to keep from staining and slowly breaking down the wood surface.
- Insect and rot vulnerability at failure points: Once a finish fails or a check opens, cedar becomes vulnerable at that specific spot, even if the rest of the board is sound. In a marine climate, those weak points don't dry out quickly, which gives rot and insects more opportunity.
The Maintenance Schedule Homeowners Actually Face
This is the part that matters most and gets discussed least. Cedar siding is not a one-and-done exterior. To hold up in a coastal Pacific Northwest climate, it typically needs:
- Refinishing (stain or sealant, depending on the finish chosen) roughly every 2 to 5 years, sooner on sun-exposed and weather-facing walls
- Periodic washing to remove moss, algae, and salt residue before they stain or degrade the finish
- Regular inspection for checking, cupping, or finish failure, with prompt spot repair before water gets behind a board
- Caulk and flashing checks at every joint and penetration, since cedar's movement can open gaps over time
Skip a cycle or two — which is common, since life gets busy and refinishing a whole house is a real job — and the wood is exposed to exactly the conditions (driving rain, salt air, prolonged dampness) that cause the most damage. By the time problems show up, it's often not a touch-up anymore; it's board replacement.
We're Not Saying Don't Ever Use Wood
Cedar accents — trim, a gable feature, a porch ceiling — can make sense in smaller, more protected applications where upkeep is manageable. Our concern is specifically with cedar as a full-house siding material in a climate that's this consistently wet and salty. The maintenance burden compounds over the size of the surface, and full siding jobs are the hardest place to stay ahead of it.
Why We Install James Hardie Instead
We standardized on James Hardie fiber cement siding because it's engineered to handle exactly the conditions that wear cedar down. Hardie's HZ5 product line is formulated for climates with prolonged moisture exposure, and the material itself doesn't absorb and release water the way wood does, so it isn't subject to the same swelling, cupping, and checking cycle.
The factory-applied ColorPlus finish is baked on under controlled conditions and backed by its own finish warranty, which means no repeated staining or sealing schedule — a wash to remove moss or salt film is typically all it needs. Fiber cement is also non-combustible, which matters to us and to insurers. And Hardie backs the product with a strong, transferable warranty, so if a homeowner sells the house, that protection goes with it.
None of this means cedar is a bad product — it means we'd rather put our name behind a siding system that holds its look and its integrity through Bellingham's rain, salt air, and moss season with a fraction of the upkeep. If you're weighing cedar against fiber cement for your home, we're glad to walk through the honest trade-offs in person. Reach out for a free, no-pressure estimate and we'll help you figure out what makes sense for your house.