Why We Don't Install Cedar Siding: An Honest Look

We Get Asked About Cedar a Lot

Cedar siding comes up in almost every conversation we have about exterior upgrades in Semiahmoo. It's a beautiful material with a long history in the Pacific Northwest, and homeowners who grew up around cedar-clad homes often want that same look on their own house. We understand the appeal. We just don't install it, and we think you deserve a straight explanation of why before you spend real money on a siding decision.

This isn't a knock on cedar as a species of wood. It's a statement about what happens to solid wood siding once it's hanging on a wall in a marine climate like ours, year after year, and what that means for the homeowner who has to live with the maintenance schedule.

What Cedar Siding Gets Right

Before we get into why we walked away from installing it, it's worth being fair about what cedar actually offers, because the appeal is real:

• A natural grain and texture that manufactured products still try to replicate
• A warmth and depth of color, especially in clear or vertical-grain cuts, that reads as genuinely high-end
• Naturally occurring oils that give it some inherent resistance to insects and decay compared to other softwoods
• A long track record on Pacific Northwest homes, so it's a familiar, trusted look in this region

If cedar siding were installed once and never touched again, this would be an easy recommendation. The problem is that it isn't a one-time decision — it's an ongoing relationship between the homeowner and the material, and that relationship gets harder in a climate like Semiahmoo's.

The Maintenance Cedar Actually Requires

Cedar is a real wood product, and real wood moves, absorbs moisture, and breaks down under UV exposure the same way any exterior wood does. To keep it performing and looking the way it did on day one, cedar siding needs:

Regular Refinishing

Stain or clear sealant on cedar siding isn't a "set it and forget it" coating. Depending on sun and weather exposure, most cedar siding needs to be re-stained or re-sealed every few years, and that's not a small job — it typically means pressure washing, sanding or scraping any failed finish, and a full re-coat of the entire exterior.

Caulk and Joint Inspection

Every seam, corner, and butt joint on a cedar installation is a place water can get behind the board. Those joints need to be checked and re-caulked periodically, because once water gets behind cedar siding, it doesn't dry out quickly.

Moss and Mildew Management

Cedar's natural texture gives moss and algae plenty of surface to grab onto, and organic growth holds moisture against the wood. Homeowners who skip regular cleaning often find dark streaking and soft, spongy boards within a few seasons.

Why Whatcom County's Climate Makes This Harder

Semiahmoo sits right on the water, and that proximity is exactly what makes cedar maintenance so demanding here. The combination of salt air, driving rain off the Strait, and a moss season that can run for most of the year puts more stress on wood siding than a drier inland climate ever would.

Salt-laden air accelerates the breakdown of finishes and speeds up weathering on exposed wood surfaces. Driving rain — rain that comes in sideways during a windstorm rather than falling straight down — gets pushed up under lap edges and into joints that would stay dry in calmer weather. And Whatcom County's long, damp winters mean cedar siding rarely gets a real chance to dry out completely between rain events, which is exactly the condition that lets moss, algae, and eventually rot take hold.

None of this means cedar "fails" on every house. It means the maintenance schedule that keeps cedar looking good in a drier climate isn't aggressive enough for a coastal Whatcom County property, and most homeowners don't find that out until they're a few years in.

How Moisture Actually Damages Cedar Siding

The failure pattern we see on older cedar homes in this area is fairly consistent, and it's worth understanding before you commit to the material:

• Cupping and warping — boards absorb moisture unevenly on the front and back face, causing them to bow
• Checking and splitting — repeated wet-dry cycles open small cracks that let water penetrate deeper
• End-grain rot — the cut ends of boards absorb water far faster than the face, and this is almost always where decay starts
• Finish failure — once the stain or sealer starts to break down, unprotected wood weathers fast, and the damage often isn't obvious from the ground

By the time cupping or soft spots are visible from the street, there's usually already hidden moisture damage underneath. Replacing individual damaged boards is possible, but matching the weathering and finish of the surrounding cedar rarely looks seamless.

Cedar vs. Fiber Cement: The Practical Trade-offs

Factor	Cedar Siding	James Hardie Fiber Cement
Refinishing cycle	Re-stain/re-seal every few years	ColorPlus factory finish is baked on, not field-applied
Moisture behavior	Absorbs and releases moisture; prone to cupping and rot	Engineered to resist moisture-driven warping and swelling
Combustibility	Combustible, like any solid wood product	Non-combustible fiber cement
Moss/algae susceptibility	Textured surface holds organic growth	Lower susceptibility with routine rinsing
Warranty structure	Typically limited to the finish product, not the siding manufacturer	Strong transferable manufacturer warranty on the siding itself
Climate-specific engineering	Generic to all regions	HZ5 product line engineered for wetter, colder climates like ours

The point of this comparison isn't that cedar is a bad product in the abstract. It's that the ongoing labor and cost of keeping cedar performing well is significantly higher than fiber cement, and that gap widens the closer a home sits to salt water and moss-heavy tree cover — which describes a lot of Semiahmoo properties.

Fire and Insurance Considerations

Cedar siding is a combustible wood product, full stop. In parts of Washington where wildfire risk and insurance underwriting have become more front-of-mind for homeowners, that matters. James Hardie fiber cement is non-combustible, which is one more reason it's become the standard we install rather than a marketing point — it's a structural difference in the material itself, not a coating or treatment.

Why We Standardized on James Hardie Instead

We made the decision to install James Hardie fiber cement exclusively, and no other siding product, including cedar. That decision came down to a few things we can stand behind on every job:

• ColorPlus factory finish — a baked-on finish applied under controlled conditions, not a field-applied stain that starts weathering the day it's exposed to weather
• Climate-engineered product lines — Hardie's HZ5 formulation is built for the wetter, colder climate zones that include Whatcom County
• Non-combustible material — a structural advantage over any solid wood siding product
• A strong, transferable warranty — backed by the manufacturer, not just the finish applied on top
• Proven long-term performance — when installed to manufacturer spec, including proper flashing, clearances, and fastening

That last point matters as much as the product itself. Fiber cement, like cedar, still depends on correct installation — proper joint treatment, clearance from grade, and flashing details that keep water from getting behind the boards in the first place. We install one product so we can be genuinely expert in it, rather than being average across five.

If You're Still Considering Cedar

We're not going to tell you cedar can't be done well — plenty of homes in this region have worn it for decades. But if you're weighing it seriously, go in with eyes open:

• Ask any contractor bidding cedar what the realistic refinishing interval is for a home this close to the water
• Ask who is responsible if end-grain rot shows up at board cuts in year three or four
• Get clarity on whether the warranty covers the wood itself or only the applied finish
• Factor moss removal and pressure washing into your annual maintenance budget, not just a one-time cost
• Consider how much of the home is shaded or tree-covered, since that directly affects how long siding stays wet after rain

If, after that, cedar is still the look you want, that's a legitimate choice — it just isn't one we install, because we'd rather stand fully behind a product we trust in this climate than manage the maintenance conversation on a material we know will need more from you than most homeowners expect.

Let's Talk About Your Home

If you're planning a siding project in Semiahmoo or anywhere in Whatcom County and want an honest read on what will actually hold up on your specific home, we're happy to walk the property with you. Reach out for a free, no-pressure estimate — we'll tell you what we'd do and why.