Sudden Valley Siding Cedar Siding Isn't a Bad Product — It's a High-Maintenance One
We get asked about cedar siding regularly, usually from homeowners who love the look of a natural wood exterior or who are trying to match an existing cedar-clad home in Sudden Valley. We want to be upfront: cedar is a genuinely good material. Western red cedar in particular has natural oils that resist decay and insects better than most softwoods, it takes stain beautifully, and few products match its warmth and character. There's a reason it's been a Pacific Northwest building staple for generations.
But being a good material and being a good long-term siding choice for a home on Lake Whatcom aren't the same thing. Our company made a decision years ago to install James Hardie fiber cement exclusively, and cedar is one of the products we chose to leave off our install list. This page explains our reasoning honestly — not to talk cedar down, but so you understand the trade-offs before you commit thousands of dollars to an exterior.
Why Cedar Struggles Against Whatcom County's Climate
Sudden Valley sits in a part of Whatcom County that gets a lot of moisture on the exterior of a home — long stretches of driving rain off the water, humid air that lingers under tree canopy, and a moss and algae season that can run most of the year in shaded, north-facing exposures. Wood siding is a cellulose product, and cellulose is exactly what moss, algae, and mildew feed on when there's sustained dampness and not enough sun or airflow to dry it out between storms.
Cedar's natural oils slow this process, but they don't stop it, and the oils themselves deplete over time as the wood weathers and as factory or field-applied finishes age. Once the surface finish starts to break down, the wood underneath is exposed to the same rain cycle everything else on the exterior deals with — except now it's absorbing and releasing moisture with every wet-dry cycle, which is the mechanism behind most of the problems described below.
Salt-Influenced Air and Coastal Exposure
Homes in this part of Whatcom County, even those set back from open water, deal with salt-influenced marine air moving inland off the Sound. That air accelerates the breakdown of finishes and fasteners on any exterior material, but it's particularly hard on painted or stained wood because it speeds up the UV and moisture cycle that causes coatings to fail early. A cedar finish that might get eight to ten years in a drier inland climate often needs attention sooner here.
The Maintenance Cycle Nobody Enjoys Budgeting For
Cedar siding is not a install-it-and-forget-it product. To hold up, it needs an ongoing maintenance schedule that most homeowners underestimate when they're comparing materials up front.
- Re-staining or re-sealing every 3-5 years in a climate like this, sooner on south and west-facing walls that take the most sun and rain
- Annual inspection for checking (surface cracks), cupping, and warping, especially after the first hard winter
- Regular moss and mildew treatment on shaded elevations and anywhere siding sits close to landscaping or tree cover
- Caulk inspection at joints, trim, and penetrations, since failed caulk is one of the fastest routes moisture takes into a wood wall assembly
- Prompt replacement of any board that starts to rot before it can spread moisture damage to sheathing behind it
- Woodpecker and insect monitoring, since bare or thinning cedar can attract both
None of this is unusual for wood siding anywhere — it's just amplified by the number of wet days per year we get here. Skip a maintenance cycle or two and cedar can go from "needs attention" to "needs board replacement" fast.
How Cedar Actually Fails When Upkeep Slips
When we talk to homeowners about siding that's been neglected, the failure pattern with cedar is fairly consistent. It usually starts small and compounds:
Cupping and Checking
Boards absorb moisture unevenly, and the face and back of a cedar board dry at different rates. That differential causes cupping (the board curls across its width) and checking (surface cracks running with the grain). Both create places for water to pool or wick in, which accelerates everything else.
Finish Failure and UV Breakdown
Clear and semi-transparent finishes break down under UV exposure faster than solid-color stains or paint. Once a finish is compromised, the wood grays and starts absorbing water directly, which is when rot risk climbs sharply.
Rot at Vulnerable Points
Butt joints, bottom courses near grade, and areas around windows and trim are where we most often see rot start, because those are the spots where water sits longest or where a caulk joint has failed unnoticed.
Pest Vulnerability
Softened, moisture-damaged wood is more attractive to carpenter ants and to woodpeckers looking for insects underneath the siding. Once a woodpecker takes interest in a wall, it can create ongoing repair headaches distinct from the moisture issue itself.
Cost Over the Life of the Siding
The sticker price comparison between cedar and fiber cement isn't the whole story — the real comparison is total cost over 20-30 years, factoring in the maintenance cedar requires and fiber cement largely doesn't.
| Factor | Cedar Siding | James Hardie Fiber Cement |
|---|---|---|
| Initial installed cost | Moderate to high | Moderate to high |
| Refinishing cycle | Every 3-5 years | ColorPlus factory finish rated for decades; field-painted versions repaint on a much longer cycle |
| Moisture/moss resistance | Depends on ongoing maintenance | Non-combustible, engineered to resist moisture-driven damage |
| Typical lifespan with upkeep | 20-40 years, highly dependent on maintenance discipline | 30+ years, less dependent on homeowner follow-through |
| Fire rating | Combustible | Non-combustible core |
| Warranty structure | Varies by finish product, often limited | Strong transferable manufacturer warranty |
None of these numbers are a guarantee for any specific home — how a siding performs always depends on installation quality, exposure, and upkeep. But the pattern holds broadly across the homes we've evaluated: cedar's ongoing cost is spread out in labor and materials over the years, where fiber cement's cost is mostly front-loaded.
Fire and Insurance Considerations
Wildfire risk and defensible-space rules have become a bigger factor in siding decisions across Washington in recent years, and it's worth homeowners knowing where cedar stands. As a wood product, cedar siding is combustible, and some insurers now factor exterior material into premium calculations or underwriting decisions, particularly for homes near wooded lots — which describes a lot of Sudden Valley. Fiber cement's non-combustible core is one of the practical reasons we standardized on it; it's a straightforward risk-reduction factor that doesn't depend on maintenance to hold up.
Why We Standardized on James Hardie Instead
We didn't choose to install only James Hardie fiber cement because it was the easiest sell — it's because after years of doing tear-offs and re-sides on homes with every kind of siding, the products that held up with the least drama for the homeowner were consistently fiber cement, installed correctly, to spec. Hardie's HZ5 and HZ10 product lines are engineered for climate zones like ours, the ColorPlus factory finish removes the recurring refinishing cycle that wood requires, and the warranty is transferable if you sell the home — something that matters to buyers in this market who ask about siding condition during inspections.
We're not going to tell you cedar can't be made to work. Plenty of homeowners maintain it well and love the result. But we build our business on installs we can stand behind years later without the homeowner needing to call us back because a board is cupping or a finish has failed. That's a harder promise to keep with cedar in this climate than it is with fiber cement.
What Correct Installation Actually Involves
Whatever material a home ends up with, most siding failures we're called out to inspect trace back to installation shortcuts, not the material itself. When we install James Hardie, that means following manufacturer-specified fastening patterns and clearances, proper flashing and water management at every penetration and joint, correct starter strip and butt joint treatment, and factory-finish touch-up done to spec rather than with mismatched field paint. If a contractor is proposing cedar for your home, the same rigor matters even more, because wood has less margin for installation error before moisture finds a way in.
Questions Worth Asking Before You Choose Wood Siding
- Who is responsible for refinishing on the schedule the product needs, and what does that cost over 10 years?
- Does the manufacturer's warranty cover the finish, the wood, or both — and for how long?
- How is the home's exposure to sun, rain, and shade going to affect which walls need attention first?
- What's the plan if a board starts to rot — spot repair or a bigger tear-out?
- Has your insurance carrier weighed in on exterior material, especially near wooded lots?
If you're weighing cedar against fiber cement for a home in Sudden Valley or elsewhere in Whatcom County, we're happy to walk your exterior with you, point out the exposures that matter most, and give you an honest read on what each option would actually require from you over the years — no pressure, no hard sell. Reach out for a free estimate and we'll go over it in person.