Mount Vernon What Allura Fiber Cement Is
Allura is a fiber cement siding manufacturer that competes directly with James Hardie. Like Hardie board, Allura's siding is made from a mix of Portland cement, sand, and cellulose fibers, pressed and cured into planks, panels, and trim. On paper, the two products look similar: both are non-combustible, both resist rot better than wood, and both hold paint longer than vinyl or engineered wood. Allura also markets factory-primed and pre-finished lines, and its products are code-approved for use across the country, including here in Washington State.
We get asked about Allura fairly often, usually by homeowners in Mount Vernon who've gotten a bid that specs it, or who've compared it online against James Hardie and want to know what the real difference is. This page is our honest answer. We are a James Hardie-only contractor. We don't install Allura, Cemplank, LP SmartSide, vinyl, or unfinished wood siding. That's not because Allura is a bad product in the abstract — it's because of specific trade-offs that matter a lot in Skagit County's climate, and because of how we've chosen to run our business: one manufacturer, one set of installation standards, one warranty path.
Where Allura Gets It Right
Credit where it's due. Allura fiber cement is a legitimate, code-compliant siding material, and it shares the core advantages that make fiber cement a smart category in the first place:
- Non-combustible core, which matters for fire-rated assemblies and insurance considerations
- Resistant to termites and woodpeckers in a way that cedar and untreated wood products are not
- Holds its shape in temperature swings better than vinyl, which can warp or buckle
- Available in lap, panel, and shingle profiles, similar to Hardie's product breadth
- Backed by a manufacturer limited warranty, though the terms and duration differ from Hardie's
If a homeowner already has Allura siding on their home and it was installed correctly, that's not automatically a problem, and we're not going to tell you it's failing. Our decision not to install it going forward is about what we can stand behind as a company, not a claim that every Allura installation is doomed.
Why We Passed on Allura
Regional Engineering
James Hardie builds region-specific product formulations under its HardieZone system, with an HZ5 formulation engineered for the wetter, milder climates of the Pacific Northwest — different from the HZ10 formulation sold in the hot, humid Southeast. That distinction exists because fiber cement's biggest long-term risks (moisture absorption at cut edges, freeze-thaw stress on the cement matrix, coating adhesion in constant damp conditions) play out differently depending on where the siding lives. We didn't find an equivalent climate-zoned engineering approach from Allura for the coastal Skagit County market. That gap matters more here than it would in a dry climate, given how many months a year our siding sits wet.
Factory Finish and Warranty Structure
James Hardie's ColorPlus finish is a baked-on, multi-coat factory finish with its own dedicated 15-year finish warranty layered on top of the substrate warranty, and Hardie backs touch-up paint and caulk formulated to match. Allura offers factory-finished options as well, but the finish warranty terms and the substrate warranty terms are structured differently, and in our review didn't match the length or the touch-up support ecosystem we wanted to offer clients. When a finish warranty and a substrate warranty come from the same manufacturer with matched terms, a homeowner has one phone number to call if something goes wrong. That single point of accountability is worth more to us than it might seem on a spec sheet.
Local Installer Network and Parts Availability
James Hardie runs a certified contractor program with training standards, and the trim, starter strips, flashing details, and touch-up materials are stocked by regional building supply distributors that serve Mount Vernon and the rest of Skagit County. Allura's distribution and trim ecosystem is thinner in our area. That's not a knock on the product — it's a practical supply chain reality. When we need to match trim on a repair five years after installation, or source a specific accessory quickly during a job, having a deep local supply chain reduces delays and reduces the odds of a mismatched patch job.
One Manufacturer, One Standard
There's also a business reason, and we won't pretend otherwise. Running crews, warranty paperwork, and manufacturer certification for a single product line means our installers see the same fastening patterns, the same clearances, and the same flashing details on every job, every week. Splitting our crews across two fiber cement brands with different install specs increases the odds of a mistake — using the wrong nail schedule, the wrong gap tolerance, the wrong caulk. Standardizing on Hardie lets us get very good at one system instead of adequate at two.
Allura vs. James Hardie: Side-by-Side Factors
| Factor | Allura Fiber Cement | James Hardie |
|---|---|---|
| Core material | Portland cement, sand, cellulose | Portland cement, sand, cellulose |
| Climate-zoned formulation | Not marketed as region-specific | HardieZone HZ5 for Pacific Northwest |
| Factory finish system | Factory-primed and pre-finished options available | ColorPlus baked-on finish, separate 15-yr finish warranty |
| Warranty structure | Manufacturer limited warranty on substrate and finish | Non-prorated substrate warranty plus dedicated ColorPlus finish warranty |
| Regional trim/parts supply | Limited distribution in Skagit County | Widely stocked by regional suppliers |
| Contractor certification program | Not standardized in our market | Certified installer program with training standards |
Why Climate Match Matters in Skagit County
Mount Vernon sits close enough to Puget Sound and the Skagit River delta that homes here deal with a specific combination of stresses: salt-laden air moving in off the water, long stretches of driving rain through fall and winter, and a moss season that can run most of the year on north-facing walls and anything shaded by trees. None of that is exotic — it's just persistent. Siding here doesn't fail from one dramatic event, it fails from small moisture and coating problems that get to repeat themselves fifty weeks a year instead of ten.
That's the backdrop for why we care about climate-zoned formulation and finish warranties more than a contractor in Spokane or Yakima might. A siding product with a coating rated for a drier, hotter climate zone will still function in Skagit County, but it's being asked to do a job it wasn't specifically engineered for. Over 15-20 years, that gap shows up as chalking, color fade, or caulk failure at seams sooner than it should. We'd rather install something engineered for exactly the conditions Mount Vernon gets.
Why We Standardized on James Hardie
Putting the trade-offs aside, our decision comes down to a short list of things we can verify and stand behind:
- Non-combustible fiber cement core, same category advantage as other fiber cement products
- HZ5 formulation engineered for wetter, milder Pacific Northwest climates like ours
- ColorPlus factory finish with a dedicated, matched finish warranty
- Strong, transferable warranty coverage that survives a home sale
- Deep regional supply chain for trim, accessories, and touch-up materials
- One certified installation standard across our whole crew, with no split specs to manage
We're not saying Hardie is the only fiber cement product that could ever work on a Skagit County home. We're saying it's the one we've chosen to be experts in, and the one whose warranty and finish system we're comfortable putting our name behind for the next fifteen to thirty years.
What to Ask Before You Sign a Siding Contract
Whatever brand a contractor proposes, these are the questions that actually tell you something:
- Is the finish factory-applied, or will it be field-primed and painted on site?
- Does the product have a formulation or rating specific to wet, coastal climates?
- Is the substrate warranty non-prorated, and does the finish warranty match its term?
- Is the warranty transferable if you sell the home?
- Is the installer certified or trained specifically on this product's install spec?
- Can the contractor source matching trim and touch-up materials locally, five years from now?
Cost Considerations
Material cost differences between fiber cement brands are usually modest compared to labor, tear-off, and trim work, which make up most of a siding project's price regardless of manufacturer. Where the real cost difference shows up is downstream: a finish warranty that covers fading and chalking for 15 years versus one that doesn't, or a substrate warranty that transfers cleanly to a buyer versus one with more restrictions. We'd rather a homeowner pay attention to those long-term numbers than chase the lowest bid on a spec sheet that looks similar on the surface.
If you're weighing siding options for a home in Mount Vernon or elsewhere in Skagit County, we're happy to walk through what we install, why, and what it would look like on your house. Reach out for a free, no-pressure estimate — there's a form right below this page.