Ferndale Homeowners in Ferndale who start pricing out fiber cement siding usually run into two names: James Hardie and Cemplank. Both are fiber cement products, both get pitched as a step up from vinyl, and on a spec sheet they can look nearly interchangeable. They are not. After years of installing fiber cement across Whatcom County, we made the decision to install James Hardie exclusively and to stop bidding Cemplank jobs. This page explains why, honestly and without trashing a product that has real strengths.
What Cemplank Gets Right
Cemplank is a legitimate fiber cement product, not a knockoff. Like James Hardie, it's made from a mix of cement, sand, and cellulose fiber, which means it shares fiber cement's core advantages over vinyl or wood: it doesn't burn, it doesn't attract woodpeckers or carpenter ants, and it holds paint far better than wood siding does over the long run. For a homeowner comparing fiber cement to vinyl or cedar, either brand is a real upgrade in durability and fire resistance.
Cemplank has also historically been priced competitively, and in some markets it's been easier to source quickly than Hardie. If your only two choices were "fiber cement from someone" versus "no fiber cement at all," Cemplank clears that bar. That's the fair version of the comparison, and it's worth saying plainly before getting into why we don't install it.
Where the Differences Actually Show Up
Factory Finish vs. Field-Applied Paint
This is the biggest practical difference for a Whatcom County home. James Hardie's ColorPlus finish is baked on in a factory under controlled conditions, cured to the fiber cement substrate, and backed by a dedicated finish warranty separate from the product warranty. A lot of fiber cement siding on the market, Cemplank included in many of its product lines, ships primed and relies on the installer or homeowner to apply the finish coat in the field.
Field-applied paint is only as good as the weather window it goes on in and the crew that applies it. In a region where driving rain and a long moss season can eat into your dry-application days for months at a time, that's not a small detail. A factory finish removes that variable entirely — the color and sheen are consistent, cured, and don't depend on catching a dry week in Ferndale in November.
Cut Edges and Moisture Behavior
Every fiber cement board gets cut and drilled on site, and every cut edge is a place where the substrate is exposed until it's sealed. James Hardie publishes specific edge-sealing requirements as part of its installation instructions, and its factory-finished boards are engineered so the field-cut edges are the only unfinished surface, which narrows the margin for error. With primed-only siding, more of the board's surface area depends on correct field priming and painting, which means more opportunities for a rushed or under-trained crew to leave a seam or cut edge under-protected. In a climate with salt air off the bay and near-constant winter moisture, an unsealed edge doesn't fail dramatically — it just slowly wicks water, and by the time it shows as paint failure or soft board, it's been happening for a while.
Installation Sensitivity
Fiber cement in general is less forgiving than vinyl — it needs correct fastener placement, proper clearances, and manufacturer-specified flashing details. Both Hardie and Cemplank publish installation guides, but Hardie backs its guidance with a large, established network of trained installers, technical bulletins, and a HardieZone system that assigns climate-specific product engineering by region. That infrastructure matters when a crew is making judgment calls on a real roofline in real Pacific Northwest weather, not a showroom.
| Factor | James Hardie | Cemplank (typical field-primed lines) |
|---|---|---|
| Finish | Factory-baked ColorPlus finish, separate finish warranty | Often primed only, field paint applied by installer/owner |
| Climate engineering | HZ product lines matched to regional moisture/temperature zones | General-purpose product line, less region-specific engineering |
| Installer network | Large trained-installer network, formal certification programs | Smaller, more regionally variable installer base |
| Warranty structure | Long transferable product warranty plus finish warranty | Product warranty typically shorter or does not include a factory finish |
| Replacement board matching | Widely stocked, consistent color-match availability for repairs | Availability and exact color match can vary by market and year |
Why Climate Engineering Matters Here
Ferndale sits close enough to salt water and the Nooksack lowlands that homes deal with a specific combination of stresses: salt-laden air, driving rain off the Strait, and a moss season that can run from fall through spring. Siding here isn't just holding up to occasional storms — it's under near-continuous low-grade moisture pressure for a large part of the year.
James Hardie's HZ5 product line, which is what we spec for Whatcom County homes, is engineered specifically for the wetter, cooler climate zones of the Pacific Northwest, with different moisture and freeze-cycle performance targets than the product sold in dry or hot-climate regions. That's a meaningful distinction from a general-purpose fiber cement product that isn't differentiated by climate zone. It doesn't mean a non-HZ product will fail here — it means the safety margin is thinner, and thinner margins matter more in a climate that doesn't give siding much of a break.
Warranty Structure: Read the Fine Print
Warranty comparisons between fiber cement brands are easy to wave off because most manufacturers' warranties look similar in the marketing copy. The differences show up in the details:
- Whether the finish is covered under a separate, longer-term warranty from the substrate itself
- Whether the warranty is transferable to a future homeowner if you sell the house
- Whether coverage requires the product to be installed by a certified or approved installer
- What voids coverage — improper caulking, wrong fastener type, missed clearances
- How claims are actually processed if a defect shows up ten or fifteen years in
We standardized on Hardie in part because its warranty structure — a long transferable product warranty paired with a separate ColorPlus finish warranty — gives homeowners a clearer, better-documented claims path than what we've seen from primed-only competitor products. That matters more on a coastal Whatcom County home than it does somewhere with a milder, drier climate.
Long-Term Support: What Happens in Year 12
Siding decisions don't end at installation. At some point — a tree branch, a ladder mishap, a remodel that requires cutting into a wall — you'll likely need a replacement board or two that has to match what's already on the house. James Hardie's scale and distribution mean color-matched ColorPlus boards are realistically available years after your original install. With a less widely stocked or regionally variable product line, finding an exact match for a repair five or ten years down the road can mean a visibly mismatched patch, or repainting a whole elevation to blend it in. That's a real cost that doesn't show up on the original bid.
Why We Only Install One Product
We're not a big-box siding operation that stocks three or four brands and sells whatever's cheapest that week. We're a crew that installs siding to a standard we can stand behind for the life of the product, and that means training on one system, stocking one set of trim and accessory components, and knowing one manufacturer's installation instructions cold. Splitting that focus across multiple fiber cement brands would mean less depth of expertise on each one — and on a coastal Whatcom County home, installation quality is at least as important as the product itself.
James Hardie's factory finish, HZ5 climate engineering, transferable warranty, and installer support network are the reasons we standardized on it. That's not a knock on every other fiber cement product on the market — it's a statement about the standard we hold our own work to.
What to Ask Any Siding Contractor
Whether you end up going with us or someone else, these are worth asking before you sign a contract:
- Is the finish factory-applied or will it be painted on site, and what happens if it rains during the install week?
- Is the product engineered or rated for this climate zone specifically, or is it a general-purpose line?
- What does the warranty actually cover — substrate, finish, or both — and is it transferable?
- Does the warranty require certified installation, and is the crew doing the work actually certified?
- How available will color-matched replacement boards be in ten or fifteen years?
- What are the manufacturer's specific edge-sealing and fastener requirements, and will the crew follow them?
Get an Honest Estimate
If you're comparing siding options for a home in Ferndale or elsewhere in Whatcom County, we're happy to walk through what James Hardie would look like on your specific house, no pressure and no hard sell. Fill out the form below for a free estimate and a straight answer about what your siding actually needs to hold up to our local weather.