Ferndale Two Different Materials, One Big Decision
If you're replacing siding in Ferndale, you've probably run into two very different products marketed as long-term solutions: fiber cement and engineered wood. Both are a step up from the vinyl and builder-grade materials that dominate the market, and both have real fans. But they are not the same product, and they don't age the same way once they're on a house exposed to Whatcom County weather — salt air drifting in off Bellingham Bay, driving winter rain, and the long stretch of gray, damp months that keep moss and algae active almost year-round.
We install James Hardie fiber cement siding exclusively. We don't install LP SmartSide, and we think homeowners deserve a straight explanation of why, based on what each material actually is and how it performs — not marketing claims from either side.
What Engineered Wood Siding Actually Is
LP SmartSide and similar engineered wood products are made from wood strands bonded with resins under heat and pressure, then coated with a treated overlay meant to resist moisture and insects. It's a legitimate improvement over old-style composite and hardboard siding from decades past, and it installs similarly to traditional wood lap siding, which some crews and homeowners find familiar.
The catch is that it's still wood at its core. Wood-based products are dimensionally reactive to moisture — they can swell, and if the protective coating is breached at a cut edge, fastener hole, or joint that wasn't sealed correctly, water can get into the substrate. Once that happens, the clock starts on rot, even under a factory treatment. In a climate like ours, where the siding rarely gets a long dry stretch to recover between rain events, that margin for installation error is thinner than it looks on paper.
What Fiber Cement Is Built From
James Hardie siding is made from cement, sand, and cellulose fiber, cured into a rigid board. There's no wood substrate to swell, rot, or feed fungal growth. It's also non-combustible, which matters to insurers and to homeowners thinking about wildfire-adjacent risk, even in a wetter region like ours where fire isn't the first concern that comes to mind.
Fiber cement takes color differently too. Hardie's ColorPlus finish is baked on at the factory under controlled conditions, rather than field-applied paint drying in whatever weather shows up that week. That factory finish is part of what holds up against the UV exposure and the constant damp-dry cycling that our coastal air puts on a house.
Where the Real Trade-offs Are
| Factor | Engineered Wood | Fiber Cement (Hardie) |
|---|---|---|
| Core material | Wood strand composite | Cement, sand, cellulose fiber |
| Moisture behavior | Can swell/rot if coating is breached | Doesn't rot; unaffected by moisture absorption |
| Combustibility | Combustible (wood-based) | Non-combustible |
| Finish | Field-primed or factory-primed, often field-painted | Factory-applied ColorPlus finish available |
| Installation sensitivity | Cut edges and fasteners need careful sealing | Requires correct fastening and clearances, but no rot risk from minor gaps |
| Maintenance | Repainting cycles, edge sealing over time | Longer intervals between repainting with ColorPlus |
Engineered wood isn't a bad product used correctly by a careful crew. But "used correctly" is doing a lot of work in that sentence, and moss season in Whatcom County doesn't leave much room for a coating that's starting to fail at a seam. We'd rather stand behind a material that doesn't ask a homeowner to hope every joint stays sealed for the next twenty years.
Why We Standardized on Hardie
James Hardie makes climate-specific product lines, including an HZ5 formulation engineered for the Pacific Northwest's wet-weather profile. Combined with the ColorPlus factory finish and a fiber cement core that simply doesn't rot, it holds up to the specific punishment Ferndale sees: salt-tinged coastal air, sustained rain rather than short bursts, and the shaded, damp conditions that let moss and algae take hold on north-facing walls and anything close to tree cover.
Hardie also backs its products with a strong transferable warranty, which matters if you plan to sell the home down the road — the coverage follows the house, not just the original buyer.
We standardized on one material because we'd rather install one system extremely well than juggle several and hope each one gets the installation attention it needs. Fiber cement, installed to spec, is the product we're comfortable putting our name behind in this climate.
Get an Honest Look at Your Home
Every house is different, and the right siding decision depends on your home's exposure, existing condition, and budget. If you'd like a straightforward, no-pressure estimate and a chance to see James Hardie siding options in person, reach out using the form below.