Ferndale Two Good Products, One Climate That Doesn't Forgive Mistakes
Homeowners in Ferndale often ask us why we don't offer engineered wood siding like LP SmartSide alongside James Hardie fiber cement. It's a fair question — engineered wood has come a long way from the OSB siding failures of the 1990s, and modern versions with resin-saturated strand technology are a legitimate improvement over what came before. But "improved" and "right for Whatcom County" aren't the same thing, and after years of installing and repairing siding in this corner of Washington, we settled on one product line for a reason.
What Engineered Wood Gets Right
Engineered wood siding is lighter than fiber cement, which makes it easier and faster to install. It holds paint well initially, machines cleanly on site, and costs less upfront than a comparable fiber cement job. For builders working on tight margins in dry climates, it's a reasonable choice. We're not going to pretend otherwise — it's wood-based siding done better than traditional lap board.
Where It Runs Into Trouble Here
The problem isn't the factory-applied resin barrier — it's what happens at every cut edge, seam, fastener penetration, and corner joint made on site during installation. Engineered wood is still, at its core, a wood product. Once moisture finds a way past that surface treatment — through a poorly sealed cut, a nail hole, or a joint that opens up as the house settles — the substrate can swell and deteriorate from the inside, often before it's visible from the outside.
That's a real concern anywhere, but it's a bigger one in Ferndale. We're close enough to Bellingham Bay and the Strait of Georgia that salt-laden air is a constant, not an occasional event. Add Whatcom County's driving winter rains, the long stretch of gray, damp months where surfaces rarely fully dry, and the moss and algae growth that thrives in that shade and moisture, and you've got a climate that specifically targets the failure mode engineered wood is most vulnerable to. We'd rather not install a product whose long-term performance depends heavily on perfect field sealing and diligent annual maintenance in exactly the conditions that make both harder.
Maintenance Burden Is the Real Difference
This comes down to ongoing homeowner responsibility. Engineered wood siding generally needs field-applied caulking at joints and cut ends maintained on a schedule, prompt attention to any scrapes or impact damage, and repainting on a cycle to keep the moisture barrier intact. Skip a year or two during a wet stretch — which happens to every homeowner at some point — and the risk of trapped moisture goes up. Fiber cement isn't maintenance-free either, but it doesn't have an internal wood substrate that can swell, and James Hardie's ColorPlus factory finish is baked on before it ever reaches the jobsite, which removes a big chunk of the field-sealing variable entirely.
Why We Standardized on James Hardie
| Factor | James Hardie Fiber Cement |
|---|---|
| Core material | Cement, sand, and cellulose fiber — non-combustible, no wood substrate to swell |
| Finish | ColorPlus factory-applied finish, engineered to resist fading and moisture intrusion |
| Climate engineering | HZ10 product line formulated for wet, moderate Pacific Northwest climates |
| Warranty | Long-term, transferable warranty on the substrate and factory finish |
| Moss/algae exposure | Won't rot or delaminate if moss or algae takes hold before it's cleaned |
James Hardie's HZ10 line is specifically formulated for regions like ours — moderate temperatures with high moisture exposure — rather than the hotter, drier climate zones some siding products are optimized for. That distinction matters more here than most homeowners realize until they've watched a neighbor deal with a moisture problem a few years into ownership.
Fiber cement also simply doesn't burn, which matters given how often the Pacific Northwest sees wildfire smoke and dry-season fire risk creep further into what used to be a "someone else's problem" conversation. And because Hardie's finish is cured at the factory under controlled conditions, the color consistency and adhesion are more predictable than anything applied on site, in the rain, on a ladder.
Our Standard, Not a Universal Verdict
We're not telling anyone engineered wood siding is a bad product across the board — it has a place. But we install siding for a living in a specific place, and Ferndale's salt air, driving rain, and moss season are exactly the conditions that expose engineered wood's weak points and play to fiber cement's strengths. Once we saw that pattern repeat on service calls, offering both products stopped making sense. We install James Hardie, to spec, every time, because it's what we're comfortable standing behind on a Whatcom County home for the next thirty years.
If you're weighing siding options for a home in Ferndale or anywhere in Whatcom County, we're happy to walk your property, look at your specific exposure, and talk through what makes sense — no pressure, no obligation. Reach out for a free estimate.
