Ferndale Siding Allura Is a Real Fiber Cement Product — So Why Don't We Install It?
Homeowners in Ferndale sometimes ask us to bid a job with Allura fiber cement already specified, usually because a supplier quoted it as a lower-cost alternative to James Hardie. We want to be upfront about why we don't carry it. This isn't about calling Allura a bad product — it's cement, sand, and cellulose fiber, the same basic recipe every fiber cement manufacturer uses, and it will outperform vinyl or untreated wood in most respects. Our decision comes down to what we've standardized on as a company, and what we're willing to warranty and stand behind on homes in Whatcom County.
What Allura Gets Right
Fiber cement as a category earns its reputation. It's non-combustible, it doesn't attract pests, and it holds paint far better than wood siding does. Allura's boards are manufactured to standard fiber cement specs and are code-compliant for siding installation across the country, including in coastal, high-moisture climates like ours. If you're comparing it strictly against vinyl or cedar, Allura is a step up in durability and fire resistance.
Where the Trade-offs Show Up
Factory Finish and Field Painting
The biggest practical difference between Allura and James Hardie shows up at the finish coat. Hardie's ColorPlus finish is baked on in a factory-controlled process and backed by its own dedicated finish warranty. A lot of Allura product in this market ships primed rather than factory-finished, which means the siding gets its final paint job on site, in Whatcom County weather. Field-applied paint over fiber cement is far more sensitive to temperature, humidity, and applicator skill than a factory finish. Get it right and it looks great. Get it wrong — paint applied on a damp fall day, or a thin coat that doesn't fully seal the substrate — and you're looking at premature peeling, chalking, or uneven fade within a few years, right when Ferndale's rain and salt air are working hardest against the finish.
Moisture Management at the Edges
Fiber cement in general is dimensionally stable, but it isn't waterproof — it's a cementitious product that will wick moisture at cut edges, fastener penetrations, and butt joints if those details aren't sealed correctly. That's true of Hardie too. The difference is documentation and installer support: Hardie publishes exhaustive, climate-specific installation instructions (including a Pacific Northwest-relevant HZ5 product line engineered for exactly the freeze-thaw and moisture cycling we get near the water) and backs it with training programs for contractors. We've found Allura's installation guidance and regional product differentiation thinner by comparison, which puts more of the moisture-management burden on the installer's judgment rather than the product spec. In a county where driving rain off the Strait and a long moss season stay in contact with siding for months at a stretch, that gap matters.
Warranty Structure
Read the fine print on any fiber cement warranty and you'll find two separate things bundled together: a substrate warranty (the board itself won't rot or crack) and a finish warranty (the paint won't peel or fade). Hardie's ColorPlus system ties both together under one manufacturer-backed warranty because the finish is applied by Hardie, not the installer. When a product ships primed and gets painted on site, the finish warranty — if there is one — usually comes from the paint manufacturer or the contractor, not the siding manufacturer. That splits accountability exactly at the point where most premature siding failures actually happen: the topcoat.
Why We Standardized on James Hardie
We install only James Hardie fiber cement, and we did that deliberately rather than by default. Hardie's HZ5 line was engineered for the wet, temperate climate zone Whatcom County sits in — the freeze-thaw cycling, sustained moisture, and salt-tinged air coming off Bellingham Bay are exactly the conditions that product line is tested against. The ColorPlus factory finish removes the single biggest variable in siding longevity — field paint quality — from the equation entirely. And the warranty is transferable and backed by one manufacturer for both the board and the finish, which matters if you sell the house before the siding's service life is up.
What This Means for Your Project
If you've been quoted Allura or another primed fiber cement product, it's worth asking your contractor two questions: is the finish factory-applied or field-applied, and does one warranty cover both the substrate and the paint, or are those handled by two different companies? Those answers will tell you more about long-term performance than the spec sheet will. On a Ferndale exterior facing salt air, sustained rain, and months of moss growth every year, we'd rather put a factory-finished, climate-engineered product on your home than manage those variables in the field.
If you're weighing siding options for a home in Ferndale or anywhere in Whatcom County, we're happy to walk through what we'd actually recommend for your house and why. Reach out for a free, no-pressure estimate — no obligation, just a straight answer.