Bellingham Why We're Writing This Page
Every so often a homeowner asks us for a quote and mentions that another contractor bid the job with Cemplank fiber cement siding instead of James Hardie. It's a fair question, and it deserves a straight answer instead of a sales pitch. We install James Hardie products exclusively, and we think homeowners in Bellingham and the rest of Whatcom County deserve to know why before they sign a contract with anyone.
This isn't about telling you Cemplank is junk. It's a real fiber cement product made by a real manufacturer, and fiber cement as a category is a good choice for our climate. Our concerns are narrower and more practical: factory finish quality, moisture engineering for this specific coastline, warranty structure, and the local installer support network. Those are the things that determine whether siding still looks good and performs well fifteen or twenty years from now, long after the crew has packed up and gone home.
What Cemplank Gets Right
Give credit where it's due. Cemplank is fiber cement, which means it shares the core advantages of the category over vinyl, LP SmartSide, or wood: it's non-combustible, it doesn't warp or rot the way wood-based products can, and it holds paint and texture better than vinyl. It's also generally sold at a lower price point than James Hardie, which is exactly why it shows up in competing bids. For a homeowner focused purely on upfront cost, that's a real consideration and we won't pretend otherwise.
If you're comparing bids and someone quotes Cemplank, the material itself isn't the red flag. What matters more is how it's specified, finished, and installed — and that's where our concerns start.
Factory Finish: The Part Most Homeowners Never See Bid Documents For
Fiber cement siding lives or dies on its factory finish. The board itself is durable, but the paint or coating system applied at the factory is what actually fights sun, rain, and salt air every day for the life of the siding. James Hardie's ColorPlus finish is a baked-on, multi-coat factory process backed by its own dedicated warranty against fading and peeling. Cemplank is more commonly sold primed rather than factory-finished in a comparable baked coating system, which means the final paint job depends heavily on a field-applied topcoat done on-site, in whatever weather the crew gets that week.
Field-applied finishes are only as good as the conditions they're applied in and the skill of the crew doing it. In a marine climate like ours, where humidity swings and driving rain are the norm rather than the exception, a factory-controlled finish has a real, measurable advantage over a job-site paint job. That's not a knock on any particular painter — it's just physics. A climate-controlled factory booth is going to give you more consistent adhesion and cure than a ladder and a sprayer on a Bellingham afternoon.
Why This Matters More Here Than Somewhere Dry
In a dry inland climate, a mediocre finish might just mean the paint looks a little chalky after a decade. Here, driving rain finds every weak spot in a coating, and once water gets past the finish and into the substrate, fiber cement's biggest advantage over wood — dimensional stability — starts working against you, because trapped moisture behind a compromised finish has nowhere good to go.
Moisture Behavior Along the Whatcom County Coastline
Bellingham sits on Bellingham Bay, and that proximity to salt water shapes everything about how exterior materials age here. Salt air accelerates the breakdown of lower-grade coatings and fasteners. Driving rain off the Strait pushes water sideways into seams and laps that would stay dry in a calmer climate. And our long moss season means anything that holds moisture against a wall — a poorly lapped joint, an under-caulked butt seam, a finish that's starting to chalk — becomes a growing medium, not just a cosmetic issue.
James Hardie addresses regional climate differences directly through its HZ5 product engineering, which is formulated and tested for exactly this kind of climate: freeze-thaw cycling combined with sustained moisture exposure. Cemplank doesn't offer a comparable region-specific engineering distinction in the way it's typically sold. That difference might not matter in Arizona. It matters here.
| Factor | James Hardie | Cemplank |
|---|---|---|
| Factory finish | ColorPlus baked-on multi-coat system, dedicated finish warranty | Commonly sold primed; finish quality depends on field application |
| Regional climate engineering | HZ5 zone-specific formulation for Pacific Northwest conditions | No comparable region-specific product distinction typically offered |
| Warranty transferability | Non-prorated, transferable to one subsequent owner | Varies by product line; often prorated after initial years |
| Local installer network | Widely specified; large base of trained, experienced Hardie installers | Smaller regional installer base; less consistent field experience |
| Typical material cost | Moderate-to-higher upfront cost | Generally lower upfront cost |
Installation Sensitivity and Who's Actually on Your Roof
Fiber cement in general is an installation-sensitive product — proper fastener spacing, caulking at butt joints, flashing details, and clearance from grade or hardscape all matter regardless of brand. But the risk compounds when a product has a thinner local installer base. James Hardie has built a large network of trained installers in Western Washington precisely because it's the most widely specified fiber cement brand in the region. That means more crews with real repetitions installing it correctly, more manufacturer training resources, and more accumulated local experience with how the product behaves through a wet Bellingham winter.
Cemplank shows up less often in local specs, which means fewer installers have deep, repeated experience with its particular trim systems and installation requirements. A product that's forgiving in the hands of a specialist can become a liability in the hands of a generalist crew that installs it once or twice a year. We'd rather put a well-supported product in the hands of experienced hands than a lesser-known product installed by a crew still learning its quirks.
Warranty Structure: Read Past the Headline Number
Every fiber cement brand advertises a long warranty. What matters is the structure underneath that number. Is it prorated after a certain number of years, meaning your payout shrinks over time even as your risk of a failure goes up? Is it transferable if you sell the house, or does it die with the original owner? Does it cover just the substrate, or the finish too, and are those two separate documents with separate terms?
James Hardie's warranty is structured to stay non-prorated for its full term and to transfer to one subsequent homeowner, which matters a lot in a market where houses change hands. We've found Cemplank's warranty terms to be less consistent and, in some product lines, prorated in ways that reduce the practical value of the coverage as the siding ages — which is exactly when a homeowner is most likely to need it.
Why We Standardized on James Hardie
We made a deliberate choice to install only James Hardie fiber cement siding, and it comes down to wanting every job we do to still look good and perform well decades from now, not just at the final walkthrough. That means:
- A factory finish system engineered and warrantied specifically for fading, cracking, and peeling resistance.
- Product lines engineered for our specific climate zone, not a one-size-fits-all national spec.
- A warranty structure that stays strong over time and transfers if you sell the home.
- A deep bench of local installer experience, so the crew on your roof has done this exact product many times before.
- A wide color and style selection, so standardizing on one brand doesn't mean sacrificing design flexibility.
We're not saying every home that ever got Cemplank siding is in trouble. We're saying that when we evaluated what we wanted to stand behind with our own name and our own warranty, James Hardie was the product that gave us the fewest variables to worry about in this specific climate.
What to Ask Any Contractor Before You Sign
Whether you go with us or someone else, these are the questions worth asking about any fiber cement bid you're comparing:
- Is the siding factory-finished, or will the topcoat be applied on-site, and in what weather conditions?
- Is the specific product line engineered for a marine, high-moisture climate, or is it a generic national spec?
- What does the warranty actually cover, is it prorated, and does it transfer if you sell the house?
- How many times has this crew installed this specific product, and can they speak to trim and flashing details from experience rather than a manual?
- What's the plan for butt joints, laps, and clearance from grade — the details that determine how the wall handles driving rain?
If a contractor can't answer those clearly, that tells you something regardless of which brand is on the invoice.
Let's Talk About Your Home
If you're weighing bids or just trying to understand your options before your siding needs replacing, we're happy to walk your home with you and give you a straight answer about what we'd recommend and why. Reach out for a free, no-pressure estimate — no obligation, just an honest look at what your house needs.