Ferndale Siding Cemplank Is a Real Fiber Cement Product — Let's Start There
We get asked often enough that it's worth a straight answer: yes, Cemplank is genuine fiber cement siding, not vinyl dressed up to look like it. It's manufactured from the same basic recipe as most fiber cement products on the market — Portland cement, sand, cellulose fiber, and water, cured into a rigid plank that resists fire, rot, and pests far better than wood or engineered wood siding. On paper, it checks a lot of the same boxes homeowners in Ferndale and across Whatcom County are looking for when they move away from cedar or vinyl.
So this isn't a page about fiber cement being a bad category of siding — we install fiber cement on nearly every job we do. It's a page about why, after years of installing and repairing siding in this climate, we settled on one manufacturer's fiber cement system instead of another, and why that choice matters more than most homeowners realize when they're comparing bids.
What Cemplank Gets Right
Credit where it's due. Cemplank planks hold paint well, machine cleanly, and perform reasonably in line with other fiber cement products when it comes to basic durability — resisting woodpeckers, insects, and the kind of surface rot that eventually chews through cedar lap siding on a north-facing wall. It's also typically priced a step below premium fiber cement brands, which makes it an attractive line item on a bid, especially on larger jobs where every square foot adds up.
If a homeowner already has Cemplank on their house and it was installed correctly, we're not going to tell them it's failing or that they need to rip it off the wall. Fiber cement, generally, is a sound choice. Our concerns are narrower than that — they're about long-term support, climate fit, and what happens five, ten, or twenty years after installation, which is where the differences between fiber cement brands actually show up.
Why We Don't Put Cemplank On Homes
Factory Finish Consistency
The single biggest point of failure we see on fiber cement siding isn't the board itself — it's the paint. Field-painted fiber cement, or fiber cement with a thinner factory coating, tends to show its age at the caulk lines and cut edges first, especially with the amount of driving rain Whatcom County gets off the Strait of Georgia. James Hardie's ColorPlus finish is a baked-on, multi-coat factory finish engineered specifically to survive UV and moisture cycling for decades, with color-matched caulk and touch-up products sold as part of the same system. Cemplank's finish options don't carry that same factory-baked, system-wide warranty structure, which means more of the long-term weather performance rides on job-site paint quality rather than the manufacturer's process.
Climate-Engineered Product Lines
James Hardie builds its planks in different formulations for different climate zones — HZ5 and HZ10 — specifically tuned for moisture exposure, freeze-thaw behavior, and humidity. That's not a marketing gimmick; it's a direct response to the fact that siding in the Pacific Northwest fights a different battle than siding in Arizona. Cemplank does not offer that same zone-specific engineering. For a house sitting a few miles off the water in Ferndale, dealing with salt air, near-constant winter drizzle, and a moss season that can run six months or longer, that difference isn't cosmetic — it affects how the product handles moisture at the seams and fastener points over time.
Warranty Structure and Who Actually Backs It
Every fiber cement brand offers some kind of warranty, and on paper the numbers can look similar. What matters more is the depth of the company standing behind it — how long they've been manufacturing fiber cement, how many claims they've processed, and whether the warranty transfers cleanly to a future homeowner if the house sells. We've dealt with enough warranty claims across different products to know that a warranty is only as good as the paperwork trail and the manufacturer's track record of honoring it without a fight. That's a harder thing to verify with a smaller-footprint brand than it is with the market leader.
Availability of Matching Product Down the Road
Siding gets damaged — a ladder falls on it, a tree branch comes down in a windstorm, a delivery truck backs into a corner board. When that happens five or ten years after installation, you need to find matching plank profile, thickness, and color. National brands with wide distribution and long-standing color lines make that far easier. A smaller or private-label distribution network can mean discontinued colors, subtle profile changes between production runs, or simply having to repaint an entire wall to hide a repair instead of blending one board.
Installer Network and Manufacturer Support
James Hardie runs a formal contractor certification program, with training on fastening patterns, clearances, and joint treatment that are specific to their product and this region's exposure. That gives us a direct line to manufacturer engineering support if a detail comes up on an unusual roofline or a tricky moisture condition. Not every fiber cement brand has an equivalent structure, and installation quality on fiber cement siding in general is far more sensitive to correct technique than most homeowners assume — wrong fastener spacing or missed flashing details cause more siding failures than the board material itself ever does.
Why Whatcom County Weather Raises the Stakes
Ferndale sits close enough to the water that salt air is a real factor on exterior materials, not a theoretical one. Add in driving rain off the Strait, long stretches of gray, damp weather, and a moss season that can start in October and not really let go until spring, and you've got a climate that's genuinely tough on siding finishes and seams. This isn't a place where marginal differences in factory finish or seam engineering stay marginal for long — they show up as chalking, caulk failure, and moss and algae staining faster than they would in a drier climate. That's a big part of why we don't treat fiber cement brands as interchangeable. The product that's "fine" in a mild, dry climate isn't necessarily the product we'd choose to defend a home through a Whatcom County winter for the next 30 years.
Cemplank vs. James Hardie: A Side-by-Side Look
| Factor | Cemplank | James Hardie |
|---|---|---|
| Base material | Fiber cement | Fiber cement |
| Climate-specific formulations | Not offered | HZ5 / HZ10 zone-engineered |
| Factory finish system | Varies by distributor/line | ColorPlus baked-on multi-coat finish |
| Color-matched caulk and touch-up system | Limited | Included as part of the finish system |
| Contractor certification program | Not standardized | Formal certified installer network |
| National distribution / long-term match availability | Regional/distributor-dependent | Broad, consistent nationwide |
| Typical price position | Value-tier fiber cement | Mid-to-premium fiber cement |
Cost Isn't the Only Number That Matters
We won't pretend Cemplank isn't cheaper on a bid comparison — it usually is, and for a homeowner working within a tight budget, that difference is real and worth respecting. But the true cost of a siding job includes what happens after installation: how well the finish holds up through a Whatcom County winter, how easy it is to get a color-matched replacement board in year twelve, and how confidently a future buyer's inspector or appraiser recognizes the product on the wall. A lower material cost that leads to a repaint in year eight, or a mismatched repair patch that never quite blends, ends up costing more than the difference would have upfront.
Questions Worth Asking Before You Choose a Fiber Cement Brand
- Does the manufacturer offer a formulation engineered for coastal, high-moisture climates like ours, or is it one general-purpose product for the whole country?
- Is the color a baked-on factory finish, or will it need field painting and repainting on a normal cycle?
- How long has this brand been manufacturing fiber cement, and how easy is it to find product history and warranty claims data?
- If a board gets damaged in ten years, how likely is it that the same profile and color will still be in production?
- Is the installer certified by the manufacturer, or just generally experienced with "fiber cement" as a category?
- Does the warranty transfer to a new owner if the house sells, and what's required to keep it valid?
What We Install Instead, and Why
We standardized on James Hardie siding because it's the one fiber cement system where every piece — the plank formulation, the factory finish, the trim, the fasteners, the installer training — is engineered to work together and to hold up in exactly the kind of climate Ferndale sits in. The HZ5 formulation is built for the Pacific Northwest's moisture load, the ColorPlus finish is designed to resist fading and cracking well beyond what field-applied paint typically manages, and the warranty is backed by a company with decades of fiber cement manufacturing behind it and a track record we can point homeowners to directly.
That doesn't mean Hardie is magic or maintenance-free. It still needs to be installed to spec — correct clearances, proper fastening, flashed and caulked joints — and it still needs periodic cleaning to stay ahead of moss and algae in our climate. But when we're the ones putting our name behind a 20- or 30-year exterior, we want every layer of that system, not just the board, working in our favor.
What a Correct Installation Looks Like, Regardless of Brand
Whatever fiber cement product ends up on a wall, the installation details matter more than most people expect. A few things we check on every job:
- Minimum clearance from grade, roofing, decks, and other hard surfaces to keep the bottom edge of the siding out of standing moisture
- Correct fastener type, spacing, and depth — over-driven or under-driven nails are one of the most common causes of early failure
- Properly lapped and flashed joints at windows, doors, and horizontal seams
- Factory-cut edges used wherever possible, with field cuts sealed per manufacturer spec
- Adequate gap and sealant at butt joints to allow for expansion without trapping water
Get those details wrong on any fiber cement brand, including Hardie, and you'll see problems regardless of what's printed on the box. Get them right, and the brand and climate-engineering differences we've laid out above are what determine how the siding ages over the next few decades.
Talk to Us Before You Decide
If you're comparing bids and one of them includes Cemplank or another fiber cement brand, we're happy to walk through what's different and why, with no pressure either way. Reach out for a free estimate and we'll take a look at your home, talk through what makes sense for your exposure and budget, and give you a straight answer.