Ferndale Siding Cemplank Is a Real Fiber Cement Product — Here's Why We Still Don't Install It
If you've been pricing out siding in Ferndale or elsewhere in Whatcom County, you may have run across Cemplank as a lower-cost fiber cement option. We want to be upfront about something: Cemplank is not a bad product in the way vinyl or thin engineered wood can be. It's genuine fiber cement — cellulose fiber, sand, and Portland cement pressed and cured — which means it shares the same basic non-combustible, rot-resistant backbone that makes fiber cement siding worth choosing over wood or plastic in the first place. We're not going to tell you it falls apart or fails on the wall. That wouldn't be honest, and it's not what we've seen.
What we will tell you is why, after years of installing fiber cement siding on homes from Ferndale down through Bellingham and out toward the water, we standardized on James Hardie and stopped bidding jobs with Cemplank. It comes down to regional engineering, factory finish, and what happens five, ten, and twenty years after installation — not what happens on install day.
Regional Climate Engineering
Whatcom County siding takes a specific kind of beating. We're close enough to Bellingham Bay and the Salish Sea that salt-laden air is a constant, not an occasional event. Layer on our driving winter rain and a moss season that can run eight months out of the year on north-facing walls, and you've got a climate that punishes any siding product with weak moisture management or a generic, one-size-fits-all formulation.
James Hardie engineers its fiber cement lines by climate zone, and the HZ10 formulation used across the Pacific Northwest is built specifically for high-moisture, marine-influenced conditions like ours. Cemplank, by comparison, is manufactured and marketed as a more regionally uniform product. That's not a flaw exactly — it keeps the product simpler and often cheaper — but it means you're not getting a formulation that was specifically tuned for the freeze-thaw, salt-air, moss-prone conditions a Ferndale wall actually faces.
Factory Finish and Long-Term Color Performance
This is the biggest practical difference for homeowners. James Hardie's ColorPlus finish is baked on in a controlled factory environment through multiple coats, which is a big part of why it holds color and resists fading, chipping, and moisture intrusion at the finish layer far longer than field-applied paint. Cemplank's finish options and factory-applied coating programs are less consistent from region to region, and in a lot of Pacific Northwest applications the product ends up field-primed and site-painted like traditional wood siding.
Site-applied paint on fiber cement isn't a disaster, but it puts the long-term performance of your siding's finish back in the hands of paint quality, application conditions, and repainting schedules — the exact maintenance cycle that fiber cement is supposed to help you get away from. In a climate where wet weather limits your painting window and moss growth stresses painted surfaces, that difference compounds over time.
Warranty and Regional Support
James Hardie backs ColorPlus siding with a strong, transferable, non-prorated warranty structure and has a long, established distribution and support network throughout Washington. That matters more than it sounds like it should. If a piece gets damaged, if you sell the house, or if a future owner needs a color-matched repair panel a decade from now, having a manufacturer with deep regional stock and a well-documented warranty makes that a phone call instead of a headache.
Cemplank's distribution and warranty support in our part of the country is thinner. We've had to think about not just how a product performs on day one, but how easy it is to service, match, and warranty fifteen years down the road — and that's where the gap really shows up.
Where This Leaves Us
We're not making a claim that Cemplank fails or that it's a poor product on its own terms. We're making a business and craftsmanship decision: for the specific conditions Ferndale and Whatcom County homes deal with — salt air, driving rain, extended moss exposure — we'd rather install one system we know is engineered for this climate, backed by a finish warranty we trust, and supported by a supply chain that will still be here when a homeowner needs a repair. That system is James Hardie.
| Factor | What It Means Here |
|---|---|
| Climate-zone formulation | Hardie HZ10 is engineered for Pacific NW moisture and salt exposure |
| Finish | ColorPlus factory finish vs. more common field-painted Cemplank applications |
| Warranty | Hardie offers a strong, transferable, non-prorated warranty with deep regional support |
| Long-term service | Broader Hardie distribution makes future color-matched repairs easier |
If you're weighing siding options for a home in Ferndale or anywhere in Whatcom County, we're happy to walk through what we install and why, with no pressure to book anything. Reach out for a free estimate and we'll take an honest look at your home's specific exposure and needs.
