Ferndale Two Fiber Cement Products, One Big Difference in How They're Made
If you've been collecting siding quotes in Ferndale, you've probably noticed that not every "fiber cement" bid is quoting the same product. Cemplank, a brand under the Etex/Allura umbrella, and James Hardie are both genuine fiber cement — a blend of cellulose fiber, sand, and Portland cement pressed into planks and panels. On paper they look like close cousins. In practice, the manufacturing details, finish systems, and regional engineering behind each one add up to a real difference in how the siding performs on a house that sits fifteen minutes from Bellingham Bay and gets soaked by driving rain for half the year.
We install James Hardie products exclusively. Not because Cemplank is a scam or a bad-faith product — it's legitimate fiber cement and it has a place in the market. We simply made a standard for our own crews and our own warranty commitments, and after years of installing and repairing siding around Whatcom County, Hardie is the one we're willing to put our name behind. Here's the honest reasoning.
What Cemplank Gets Right
Give credit where it's due. As fiber cement, Cemplank shares the core advantages that make this material category worth choosing over vinyl or wood in the first place:
- Non-combustible — a real advantage over vinyl siding and untreated wood, and something insurers increasingly ask about.
- Dimensionally stable — it doesn't expand and contract with temperature swings the way vinyl does, so it holds paint and caulk lines better than plastic siding.
- Resistant to rot and insect damage in a way that raw wood and engineered wood products aren't.
- Generally priced a step below James Hardie, which is the main reason it shows up in competing bids.
If a contractor is choosing between Cemplank and vinyl, Cemplank is very likely the better long-term material. That's not the comparison homeowners in Ferndale usually need help with, though — the real question is Cemplank versus Hardie, and that's where the gap opens up.
The Finish System Is the First Fork in the Road
This is the single biggest practical difference, and it matters more here than almost anywhere else in the country because of how much rain and moisture our siding sits in.
James Hardie's ColorPlus products come from the factory with a baked-on, multi-coat finish applied under controlled conditions before the boards ever leave the plant. That finish is engineered specifically to bond to fiber cement and to hold color and sheen through UV exposure and repeated wet-dry cycling.
Cemplank is typically sold primed, which means the finish coat gets applied in the field — either by the installer or by the homeowner's painter — after installation. Field-applied paint on fiber cement can absolutely look good and perform well when it's done right, with the correct primer, the correct number of coats, and enough dry time between coats. The problem is that "done right" depends entirely on the weather window and the crew doing the painting, and in a marine climate with a moss season that can stretch from October into May, dry, low-humidity painting windows are not guaranteed. A factory finish removes that variable entirely. It's cured under ideal conditions once, at the plant, and it arrives on the truck already done.
Why This Matters More in Ferndale Than in Phoenix
Salt air off the Strait of Georgia and Bellingham Bay accelerates finish breakdown on anything that isn't engineered to resist it. Combine that with our long stretches of driving rain and the moss and algae growth that thrives in shaded, damp siding cavities, and a field-applied finish has to work a lot harder here than it would in a dry inland climate. A factory finish with a manufacturer warranty attached to it is a meaningfully different promise than a site-applied paint job, even a good one.
Climate-Engineered Products vs. One-Size-Fits-All
James Hardie manufactures different formulations of the same siding profiles for different climate zones — the "HZ" (HardieZone) system — and the Pacific Northwest falls into the wetter, moisture-heavy zone that gets a formulation engineered around that reality. Cemplank does not offer that same level of regional formulation. It's a solid general-purpose fiber cement product, but it isn't specifically engineered around long wet seasons, moss exposure, and coastal moisture cycling the way Hardie's HZ5 line is.
For a house on flat, low-lying ground in Ferndale or Lynden that holds moisture longer, or a shaded north wall that never fully dries out between storms, that difference in engineering intent is not cosmetic. It's the difference between a product built for exactly this climate and a product that happens to be sold in this climate.
Warranty Structure: What You're Actually Covered For
Every fiber cement manufacturer offers a warranty, but the fine print is where they diverge. Hardie backs ColorPlus products with a long non-prorated limited product warranty and a separate finish warranty specifically covering the factory coating — chipping, peeling, and fading. Because the finish is applied at the factory to a documented standard, Hardie can stand behind it as a single, traceable product.
With a primed product finished in the field, the finish warranty picture gets murkier. The paint manufacturer, the primer manufacturer, and the fiber cement manufacturer are often three different companies, and if the finish fails, proving whose warranty applies — and whether it was a material defect or an application issue — becomes the homeowner's problem to sort out. That's not a knock on Cemplank's product warranty on the board itself; it's a structural reality of splitting the substrate and the finish across different points in the supply chain.
Cost and Coverage: A Straight Comparison
| Factor | Cemplank | James Hardie ColorPlus |
|---|---|---|
| Base material | Fiber cement | Fiber cement |
| Typical finish | Factory primed, field-painted | Factory-applied ColorPlus finish |
| Climate-specific formulation | General purpose | HZ5 zone engineering for Pacific NW |
| Finish warranty | Depends on paint/primer used | Backed directly by manufacturer |
| Upfront material cost | Generally lower | Generally higher |
| Certified/trained installer network | Smaller in this region | Larger, with contractor certification programs |
The upfront cost gap is real and we won't pretend otherwise. But siding is a 30-plus-year decision, and the gap tends to shrink — or reverse — once you account for repainting cycles, warranty claims that are harder to resolve, and the resale conversation a future buyer's inspector will have about the siding.
Why We Standardized on One Product
Running two different siding systems means training crews on two different install specs, two different fastening and clearance requirements, two different caulk and flashing details, and two different warranty registration processes. Every one of those seams is a place where a mistake can slip in. We chose to become genuinely expert in one system rather than adequate at several.
James Hardie is the product we trust to hold its finish through a Whatcom County winter, resist the moss and mildew that our humidity encourages, and back that performance with a warranty that's traceable to a single manufacturer. When something goes wrong with Hardie siding, there's one company to call and one documented install standard to check against. That clarity is worth more to us — and to the homeowners we work for — than the lower sticker price on a Cemplank quote.
Questions Worth Asking Any Contractor Who Bids Cemplank
If you're comparing quotes and one of them includes Cemplank or another primed fiber cement product, these are fair questions to ask before you decide:
- Who is warranting the finish coat — the fiber cement manufacturer, the paint manufacturer, or the contractor?
- What primer and paint system will be used, and is it rated for fiber cement specifically?
- What happens to the finish warranty if the boards are painted after installation instead of before?
- Is the crew installing to the manufacturer's published fastening, clearance, and flashing spec, or a generic fiber cement approach?
- How many Cemplank installations has this crew completed in a wet coastal climate versus how many Hardie installations?
- Does the quoted warranty transfer to a future homeowner if you sell the house?
None of these questions should be uncomfortable for a contractor to answer. If they are, that's useful information on its own.
Get a Straight Answer for Your House
Every house in Ferndale carries its own exposure — how close to the water it sits, how much shade it gets, which walls take the worst of the winter storms off the Strait. We're happy to walk your home, talk through what we see, and explain exactly why we'd spec Hardie for your specific siding project. Reach out for a free, no-pressure estimate — no obligation, just a straight answer.