Birch Bay Siding Two Fiber Cement Brands, One Contractor's Decision
Homeowners in Birch Bay sometimes ask us why we don't offer Allura siding as an option alongside James Hardie. It's a fair question, because Allura is a real fiber cement product — not vinyl dressed up to look tougher, not an engineered wood product with a moisture problem waiting to happen. It's Portland cement, sand, and cellulose fiber, pressed and cured the same general way Hardie board is made. On paper, the two products look similar enough that a homeowner comparing spec sheets could reasonably wonder what the difference is.
The difference isn't that Allura is a bad product. It's that after years of installing fiber cement siding on homes exposed to Whatcom County's salt air, driving rain off the Strait, and a moss season that runs longer here than almost anywhere else in the state, we settled on one manufacturer's system — factory finish, trim, fasteners, and warranty all engineered to work together — rather than stocking two competing lines and installing whichever one a homeowner picked off a brochure. This page explains the reasoning, not to talk Allura down, but to be straight with you about why we don't put it on Birch Bay homes.
What Allura Gets Right
Credit where it's due. Allura fiber cement is non-combustible, resists rot in a way that wood and wood-composite products can't match, and holds paint far better than vinyl over the long run. It's manufactured domestically, comes in lap, panel, and shingle profiles, and is priced competitively — often slightly below James Hardie in material cost. For a contractor or homeowner focused purely on getting a cement-based siding on the wall at the lowest possible price, it's a legitimate option, and we're not going to pretend otherwise.
Where things get more complicated is in the details that only show up five, ten, and twenty years into a coastal Washington install — the factory finish system, the climate-specific engineering, the warranty structure, and the availability of matching trim and repair stock when something needs attention.
Factory Finish: Where the Real Difference Lives
Both brands offer factory-applied finishes, but the systems aren't interchangeable in practice. James Hardie's ColorPlus finish is baked on in a controlled factory environment with multiple coats and a specific cure process, and it's backed by a finish-specific warranty separate from the substrate warranty. Allura offers pre-finished options as well, but our experience sourcing and matching product regionally has been less consistent — batch-to-batch color variation, more limited local stocking of factory-finished runs in the specific colors homeowners want, and fewer options when a repair board is needed two years after the original install and the batch has changed.
In a marine climate, finish consistency isn't cosmetic nitpicking. Salt-laden air and near-constant damp cycles are hard on any exterior coating, and a finish that was engineered and tested specifically for coastal exposure holds up differently than a general-purpose one. That's a big part of why we don't mix and match — the finish system is half of what you're actually buying.
Field-Applied Paint Is a Different Product Entirely
If a homeowner opts for unprimed or field-primed board on either brand to save money, you've essentially opted out of the factory finish warranty altogether, and the long-term performance now depends on the paint contractor's prep and the paint itself — not the siding manufacturer. We don't recommend field-finishing fiber cement in this climate at all, regardless of brand, because Birch Bay's rain and moss exposure will find every weak spot in a field-applied coating faster than it would in a drier inland climate.
Climate-Zone Engineering
James Hardie engineers specific product formulations — its HZ5 and HZ10 lines — for different climate zones, adjusting the board for moisture and freeze-thaw exposure by region. Whatcom County sits squarely in the wet, coastal HZ5 zone, and the boards we install are the version specifically engineered for that exposure. Allura does not publish or market an equivalent zone-specific engineering system in the way Hardie does; its board is closer to a single national formulation. That's not necessarily a defect, but for a coastal application it's one less layer of climate-specific assurance, and it's a meaningful reason we lean toward the product line that was built with places like Birch Bay in mind.
Warranty Structure
Warranty length looks similar between the two brands on the surface, but the structure and what triggers a claim differ, and warranty transferability matters a lot to homeowners who plan to sell within the warranty period.
| Factor | James Hardie (what we install) | Allura |
|---|---|---|
| Substrate warranty | Long-term limited warranty on the board itself | Long-term limited warranty on the board itself |
| Factory finish warranty | Separate ColorPlus finish warranty, distinct from substrate | Finish warranty terms vary by product line and are less standardized |
| Transferability to new owner | Transferable under stated conditions | Varies by line; less consistently structured |
| Regional finish/product matching for warranty repairs | Broad dealer network and factory-matched repair stock | More limited regional stocking in our experience |
None of this means an Allura warranty is worthless. It means that when we're the ones standing behind an installation for decades, we want a warranty structure and a supply chain we've dealt with consistently, not one where every claim is a slightly different conversation.
Installation Sensitivity and Local Supply
Fiber cement in general is installer-sensitive — fastener pattern, clearance from grade, flashing details, and joint treatment all matter more with cement board than with vinyl, and doing it wrong shows up as cracking, moisture intrusion, or finish failure years later, not on day one. That's true of both brands. What differs is our depth of hands-on experience: we've installed thousands of feet of one system, know its quirks, keep matching trim and touch-up product on hand, and have a direct line to technical support and warranty administration that we've used before. Adding a second fiber cement line means splitting that depth of experience and inventory across two products instead of mastering one.
For repairs and additions down the road — a homeowner adding a garage, extending a covered porch, replacing a few boards after storm damage — having one system means we can usually match existing siding on a Birch Bay home we or a colleague installed years earlier. That gets harder across competing product lines with different profiles, textures, and color runs.
What to Ask Any Contractor Before Choosing a Fiber Cement Brand
- Is the factory finish warranty separate from the substrate warranty, and what voids each one?
- Is the product engineered or rated for a specific climate zone, or is it a single national formulation?
- Can the contractor show recent local installs of this exact product, not just the brand in general?
- How readily can matching trim, corner boards, and touch-up paint be sourced in this region if a repair is needed in five or ten years?
- Is the warranty transferable to a future homeowner, and under what conditions?
- What fastening and clearance specs does the manufacturer require, and will the crew follow them to the letter?
Why We Standardized on James Hardie
We install one fiber cement system because doing one thing at a high level beats doing two things adequately. James Hardie's HZ5 engineering for wet coastal climates, the ColorPlus factory finish and its separate warranty, the depth of our own installation experience with the product, and the consistency of regional supply for repairs and additions all point the same direction for homes in Birch Bay and the rest of Whatcom County. Salt air off the Strait of Georgia, driving winter rain, and a moss season that can run eight or nine months a year reward a siding system that was engineered with exactly that exposure in mind — and installed by a crew that has done it enough times to get every detail right.
Allura isn't a product we'd tell a homeowner to avoid outright if another contractor installs it well. It's simply not the product we've chosen to put our name behind, for the reasons above.
Get a Straight Answer for Your Home
If you're comparing siding options for a home in Birch Bay or anywhere else in Whatcom County, we're glad to walk through what we install, why, and what it would look like on your specific house. Reach out for a free, no-pressure estimate — no sales pitch, just an honest look at your siding situation and what makes sense for our climate.