Bellingham Exterior Cedar Has Real Appeal — and Real Upkeep
Cedar siding has a look that a lot of Bellingham homeowners fall in love with. It's a natural material, it ages with character, and on the right house it looks fantastic. We're not going to pretend otherwise. But we're a fiber cement contractor, and we get asked often enough why we don't install cedar that it's worth laying out the honest reasons — not as a knock on the material, but as an explanation of the trade-offs that led us to standardize on something else.
Why Whatcom County Is a Tough Climate for Wood Siding
Cedar's biggest vulnerability is moisture, and Bellingham doesn't go easy on it. We get driving rain off the Sound for much of the year, a marine layer that keeps humidity elevated even on dry days, and a moss and algae season that can stretch from fall through spring on north-facing walls and anything shaded by trees. Add in salt air near the water, and you have a combination that stresses wood siding harder than most inland climates would.
Cedar is naturally rot-resistant compared to other softwoods, but "resistant" isn't "immune." Once the factory finish starts to wear — and in this climate that happens faster than in drier regions — the wood underneath is exposed to repeated wet-dry cycles. That's when checking, cupping, and soft spots start to show up, usually first at butt joints, corners, and anywhere water can sit.
What Cedar Actually Requires to Last
Cedar siding isn't a install-it-and-forget-it product. To get a long service life out of it in a coastal Washington climate, it typically needs:
- Re-staining or re-sealing every 3-5 years, sometimes sooner on south- and west-facing walls that take the most weather
- Periodic washing to keep moss and algae from taking hold, especially on shaded elevations
- Prompt repair of any cracked or split boards before moisture gets behind them
- Careful attention to caulking and flashing details, since any gap becomes a moisture entry point
- Ongoing budget for maintenance labor, which adds up over the life of the siding
None of that is unreasonable to ask of a natural wood product — it's just the reality of owning it. The question we ask homeowners is simple: do you want to sign up for that maintenance rhythm, year after year, in a climate that gives wood siding very little rest?
The Moss Problem Specifically
Whatcom County's long wet season means moss and algae growth on siding isn't a cosmetic afterthought — it's a recurring maintenance task. On cedar, moss holds moisture directly against the wood surface, which accelerates exactly the kind of decay the finish is supposed to prevent. Keeping cedar looking good here usually means more frequent cleaning than a homeowner in a drier climate would ever need to think about.
Where Cedar Makes Sense
To be fair to the material: cedar can be a good choice for accent areas, gable details, or homeowners who genuinely enjoy the upkeep and want that specific natural look on the whole house. If you're set on real wood and you're prepared for the maintenance schedule, that's a legitimate choice and there are good installers who do it well. It's just not what we install as our primary siding system, and we'd rather tell you why upfront than sell you something we don't believe fits most homes in this climate.
Why We Install James Hardie Instead
We standardized on James Hardie fiber cement siding because it's engineered to handle exactly the conditions Bellingham throws at a house. It's non-combustible, it doesn't rot, and it holds up to repeated wet-dry cycling without the checking and cupping wood is prone to. Hardie's ColorPlus finish is baked on at the factory and holds color far longer than field-applied stains, which means less repainting and fewer maintenance cycles overall.
Hardie also makes HZ5 products specifically engineered for climates with heavy moisture exposure — which describes the Pacific Northwest well, from Bellingham's marine layer to the driving rain that comes off the water. Combined with a strong transferable warranty, it's a system built for long-term performance rather than a look that requires constant attention to maintain.
| Cedar Siding | James Hardie Fiber Cement | |
|---|---|---|
| Refinishing cycle | Every 3-5 years typically | Factory finish holds for decades |
| Moisture/rot resistance | Vulnerable once finish wears | Does not rot |
| Moss/algae maintenance | Frequent washing needed | Low maintenance |
| Fire resistance | Combustible | Non-combustible |
If you're weighing cedar against fiber cement for a home in Bellingham or anywhere in Whatcom County, we're happy to walk through what each option actually means for your specific house — no pressure, no hard sell. Reach out for a free estimate and we'll give you a straight answer.