Ferndale Siding Allura Is Fiber Cement Too — So What's the Issue?
We get this question a lot, and it's a fair one. Allura is a genuine fiber cement product, made from the same basic recipe as James Hardie: Portland cement, sand, and cellulose fiber pressed into a dense, stable board. It's non-combustible, it doesn't attract wood-boring insects, and it holds paint far better than wood or vinyl ever will. If you compared a sample of Allura and a sample of Hardie side by side, they'd look and feel remarkably similar. Allura also tends to price a bit lower than Hardie in most markets, which is exactly why some contractors reach for it.
So we're not going to tell you Allura is a bad product. It isn't. What we will tell you is why, after years of installing fiber cement siding across Whatcom County, we standardized on James Hardie and stopped installing Allura — and it comes down to a handful of practical differences that matter more here than they would somewhere dry and mild.
Where the Two Products Actually Diverge
Factory Finish and Touch-Up System
Hardie's ColorPlus finish is baked on in a controlled factory process and backed by a specific finish warranty separate from the product warranty. It also has a matched touch-up and caulk system engineered to move with the board through wet-dry cycles. Allura offers factory-primed and some prefinished options, but the finish ecosystem — the depth of color selection, the availability of matched caulk and touch-up paint through local suppliers, and the number of installers who've been trained on it — isn't as built out in our region. That gap shows up years later, when a homeowner needs a touch-up and can't easily find a matching product.
Climate-Specific Engineering
Hardie engineers separate product formulations for different climate zones — HZ5 boards for the Pacific Northwest are formulated differently than boards sold in Arizona or Florida, specifically to handle high moisture exposure and freeze-thaw cycling. Allura's product line is less regionally differentiated. In a place like Ferndale, where Georgia Strait salt air, near-constant driving rain off the water, and a moss season that can run eight months out of the year all work on a house at once, that regional engineering isn't a marketing footnote — it's the difference between siding that sheds moisture cleanly and siding that slowly wicks it at the joints.
Warranty Structure and Transferability
Hardie's warranty is well-documented, widely honored by suppliers and installers, and transfers to a new owner if the home sells — which matters a lot in a market like Whatcom County where houses change hands. Allura's warranty terms are less consistently understood across the trade, and because fewer installers here work with it regularly, homeowners sometimes have a harder time getting a straight answer on what's actually covered if something goes wrong down the road.
Local Support and Track Record
This is the practical one. James Hardie has a deep track record in Western Washington — lumberyards stock it, installers are trained on it, and there's a long history of how it performs in exactly this climate. Allura shows up in this region far less often, which means less local data on long-term performance, fewer contractors with hands-on experience installing it correctly, and a thinner supply chain if you need matching material for a repair or addition five or ten years from now.
Why This Matters More in Ferndale Than Elsewhere
Fiber cement is forgiving compared to wood or vinyl, but it's not maintenance-free, and installation quality is what determines whether it performs for twenty years or needs attention after five. Whatcom County homes take a specific beating: salt-laden air rolling off Bellingham Bay and the Strait, sustained wind-driven rain rather than short downpours, and shaded, damp conditions that keep moss and mildew active nearly year-round. Any fiber cement product needs correct flashing, gapping, and caulking to handle that — but when the underlying board itself is engineered for this exact moisture profile, and the finish system is built to hold up under it, the margin for error is bigger. That's the difference we're chasing when we pick a product.
What We Install Instead
We install James Hardie exclusively — specifically the HZ5 product line engineered for the Pacific Northwest, finished with ColorPlus factory-applied color. It's non-combustible, it's proven in this climate over decades, the warranty is transferable and well understood, and if a future repair or addition is needed, matching material and experienced installers aren't hard to find in this region. We'd rather install fewer products well than offer a menu of options we can't fully stand behind for the long haul.
If you're weighing siding materials for a home in Ferndale or anywhere else in Whatcom County, we're happy to walk through what we'd actually recommend for your house, your exposure, and your budget. Reach out for a free, no-pressure estimate — no obligation, just a straight answer.