Bellingham Two Fiber Cement Products, One Choice for Bellingham Homes
Cemplank is a fiber cement siding product, and on paper it looks like a reasonable alternative to James Hardie. It's non-combustible, it's cement-based, and it's priced to compete. We get asked about it often enough that it's worth explaining plainly: we don't install it, and here's the actual reasoning, not a sales pitch.
What Cemplank Gets Right
Credit where it's due. Cemplank is a genuine fiber cement product, not a vinyl or composite imitation. It shares the same basic chemistry as James Hardie's boards — Portland cement, sand, and cellulose fiber — which means it resists fire, won't attract woodpeckers or carpenter ants, and holds paint or factory finish better than wood-based siding. For a homeowner comparing it only against vinyl or untreated wood, Cemplank is a step up.
Where the Trade-offs Show Up
Our reservations aren't about whether Cemplank is fiber cement — it is. They're about the practical differences that matter once a board is on a Whatcom County wall for the next 20-plus years.
- Regional engineering: James Hardie manufactures distinct product lines engineered for specific climate zones — including an HZ10 line built for areas with year-round moisture exposure like ours. Cemplank markets a more general-purpose product line without that same regional differentiation, which matters in a market that sees salt-laden marine air off Bellingham Bay, driving winter rain, and a moss season that can run half the year.
- Factory finish system: James Hardie's ColorPlus finish is baked on in a controlled factory environment with a documented multi-coat process and a finish warranty backing it. Cemplank's finish options and warranty structure aren't built around the same factory-applied, climate-matched system, which shifts more of the long-term appearance risk onto the field-applied coating and the installer's paint choice.
- Availability and support network: Hardie's scale in the Pacific Northwest means consistent product availability, established installation documentation, and a distributor network we can rely on for matching trim, soffit, and accessory pieces years after the original install. Cemplank's regional presence is thinner, which becomes a real problem if a homeowner needs a matching repair board five or ten years down the road.
- Installer familiarity: Fiber cement is unforgiving of installation mistakes — improper fastening, clearance, and caulking details cause most of the moisture problems blamed on the material itself. Our crews are trained and certified specifically on Hardie's installation specifications. Running two different fiber cement systems means splitting that expertise, and in a climate as wet as Whatcom County's, installation precision is not the place to introduce inconsistency.
- Warranty structure and transferability: James Hardie backs its boards with a long, transferable non-prorated warranty that adds resale value when a home changes hands. We've found Cemplank's warranty terms less competitive and less consistently transferable, which matters for homeowners who want that protection to follow the house, not just the original owner.
Why This Matters in Bellingham Specifically
Whatcom County siding takes a different kind of beating than siding in drier parts of the state. The combination of salt air drifting in off the water, sustained driving rain through the fall and winter, and a long moss and algae season means siding here is rarely given a chance to fully dry out between weather events. A product engineered generically for the broader market — rather than for sustained marine moisture exposure — is being asked to perform outside the conditions it was optimized for. That's the core of our objection to Cemplank: not that it fails on day one, but that the margin for error shrinks in exactly the conditions Bellingham throws at a house year-round.
Why We Standardized on James Hardie
Rather than stocking two similar products and letting installation quality vary by which one a crew is more comfortable with, we standardized entirely on James Hardie. That means every job gets:
- A climate-engineered HZ product line suited to Pacific Northwest moisture exposure
- A factory-applied ColorPlus finish backed by its own dedicated warranty
- Installation crews trained to one documented specification, not split across systems
- A long, transferable product warranty that holds up at resale
- Reliable local material availability for future repairs or additions
None of this means Cemplank is a bad product in the abstract. It means that when we weighed the two side by side against what a Bellingham roofline actually has to survive — salt air, sideways rain, and months of moss pressure — James Hardie was the product we were comfortable putting our name behind.
Table: Quick Comparison
| Factor | James Hardie | Cemplank |
|---|---|---|
| Climate-specific product line | Yes (HZ10 for wet climates) | General-purpose lineup |
| Factory finish system | ColorPlus, dedicated finish warranty | Standard factory options |
| Regional availability | Strong PNW distribution | Thinner regional presence |
| Warranty transferability | Long, transferable | Shorter, less consistent terms |
If you're planning a siding replacement or new install in Bellingham or anywhere in Whatcom County, we're happy to walk through these differences in person and explain what we'd recommend for your specific home. Reach out for a free, no-pressure estimate — there's a form right below this page.