Seattle Allura Isn't a Bad Product — It's Just Not the One We Stand Behind
We get asked about Allura fairly often, usually by a homeowner who got a bid from another contractor or saw it at a building supply yard for less than James Hardie. It's a fair question, and it deserves an honest answer rather than a sales pitch. Allura is a legitimate fiber cement siding manufacturer — it isn't vinyl, it isn't a knockoff, and it isn't dangerous. We simply made a business decision years ago to install one fiber cement system, learn it inside and out, and stand fully behind it. That system is James Hardie. This page explains why, without trashing the competition.
What Allura Siding Actually Is
Allura is a fiber cement lap, panel, and shingle siding product manufactured by a company with roots going back decades under different ownership and branding. Fiber cement itself — a blend of cement, sand, and cellulose fibers — is a good category of siding material. It's non-combustible, it doesn't attract woodpeckers or carpenter ants the way wood does, and it holds paint or factory finish far better than vinyl over the long run. On paper, Allura and James Hardie compete in the same category and share a lot of the same basic chemistry.
Where they diverge is in manufacturing consistency, factory finish technology, regional product engineering, and the depth of contractor and warranty support behind the product once it's on your house. Those differences matter more in Seattle than they would in a mild, dry climate, because our siding doesn't get an easy life here.
What Allura Gets Right
- It's genuine fiber cement, not a vinyl or composite imitation — it carries the real advantages of the category (fire resistance, rigidity, paintability).
- It's typically less expensive per square than James Hardie, which makes it attractive on tight budgets.
- It's available in similar lap and panel profiles, so it can achieve a comparable look on paper.
- It has been used successfully on plenty of homes across the country when installed correctly.
We're not going to pretend those points don't matter. For some homeowners, on some budgets, Allura is a reasonable choice from a reasonable contractor. It's just not the choice we've built our business around.
Why We Don't Install It
Manufacturing and Finish Consistency
James Hardie's ColorPlus factory finish is baked on and cured in a controlled environment with a documented multi-coat process, and Hardie backs it with a specific finish warranty separate from the substrate warranty. We've found the batch-to-batch consistency in color, texture, and edge sealing on Hardie boards to be more predictable than what we've seen from other fiber cement suppliers, including Allura. When we're the ones standing on the ladder and standing behind the finished wall, that consistency is what lets us guarantee our work with a straight face.
Climate-Specific Engineering
James Hardie makes region-specific formulations — HZ5 for climates with more moisture, freeze-thaw cycling, and moss-friendly humidity, versus HZ10 for hot-dry regions. That's a real engineering distinction, not a marketing label, and it's built around exactly the conditions Seattle and King County deal with: eight months of damp weather, driving rain off the Sound, and the kind of shaded, moisture-holding exposures that grow moss on a north wall in two years flat. We haven't seen Allura offer the same level of regionally engineered product differentiation, and for a coastal Pacific Northwest climate, that's not a detail we're willing to gloss over.
Warranty Depth and Contractor Network
James Hardie's warranty structure includes a labor coverage component when installed by a certified Preferred Contractor, and the company has a large enough installed base and contractor network in the Puget Sound region that warranty claims have a track record of actually getting resolved. A warranty is only as good as the company's willingness and infrastructure to honor it years down the road, and that's harder to verify with a smaller regional supplier footprint.
One System, Mastered
Every fiber cement brand has its own quirks — blade specs for clean cuts without silica dust getting out of hand, fastener patterns, minimum clearances above grade and roof lines, caulk compatibility, and factory-primer edge treatment at cuts. Running two different fiber cement systems through our crews means either half-mastering both or fully mastering one. We chose to fully master James Hardie, because split expertise is how installation mistakes happen — and fiber cement is unforgiving of installation mistakes.
Side-by-Side: Allura vs. James Hardie for Seattle-Area Homes
| Factor | Allura Fiber Cement | James Hardie |
|---|---|---|
| Base material | Cement, sand, cellulose fiber | Cement, sand, cellulose fiber |
| Regional climate engineering | Not marketed as region-specific | HZ5 formulation for wet/moisture-prone climates like ours |
| Factory finish | Factory or field-applied finish options vary by product line | ColorPlus baked-on finish with separate finish warranty |
| Labor warranty coverage | Varies, generally less standardized locally | Available through certified Preferred Contractors |
| Local contractor density | Fewer installers stocking and specializing in it locally | Widely stocked and installed across King County |
| Typical material cost | Generally lower per square | Moderate, reflects finish and engineering |
Why This Matters More in Seattle Than Elsewhere
Siding in a dry climate can get away with more forgiveness in the product and the install. Siding in King County can't. We're dealing with salt-tinged air for homes anywhere near the Sound, driving rain that hits walls sideways during winter storms, and a moss season that effectively runs most of the year on shaded north and west elevations. Any weak point in a siding system — a poorly sealed cut edge, a finish that chalks or fades unevenly, a caulk joint that wasn't rated for constant damp exposure — gets found out fast here, not in ten years but sometimes in two or three. That's why we care less about upfront price differences between fiber cement brands and more about which system holds up through a Seattle winter, and then another, and then twenty more after that.
Installation Sensitivity Isn't Optional With Fiber Cement
Whether it's Allura or Hardie, fiber cement siding is not forgiving of shortcuts. It needs the right fasteners driven to the right depth, correct clearances above roofing, decks, and grade, factory-cut or field-cut edges properly sealed, and rain-screen or drainage plane detailing behind it in our climate. A beautiful fiber cement product installed poorly will fail regardless of brand. Part of why we standardized on one system is so every crew member knows the spec cold — there's no guessing which manufacturer's clearance requirement applies on a given job.
What to Ask Any Contractor Bidding Fiber Cement Siding
- Which specific fiber cement brand and product line are you quoting, and why that one?
- Is the installer a manufacturer-certified installer for that brand, and can they show it?
- Does the warranty include labor coverage, or only the material itself?
- What clearance is specified above grade, roofing, and decks for this product in a wet climate?
- How are cut edges treated and sealed before installation?
- Is a rain-screen or drainage gap being used behind the siding?
- What's the manufacturer's track record for honoring warranty claims in this region?
Why James Hardie Is What We Actually Put on Homes
We install James Hardie because it lines up with what King County homes are actually up against: sustained damp weather, moss pressure on shaded walls, salt air for homes closer to the water, and the kind of driving rain that finds every gap in a wall assembly. Hardie's HZ5 line is formulated for exactly that moisture profile, the ColorPlus finish is warrantied separately from the board itself, and it's non-combustible, which matters more each wildfire smoke season even here on the wet side of the state. Just as important, we know this product cold — every fastener spec, every clearance rule, every detail that keeps water out of a wall assembly for decades instead of years.
Getting an Honest Recommendation for Your Home
We're not going to tell you Allura is unsafe or junk, because it isn't — it's a real fiber cement product from a real manufacturer. We're telling you why we, specifically, chose to specialize in James Hardie instead of splitting our expertise across multiple fiber cement brands, and why we think that focus matters most in a climate like ours. If you're weighing siding options for a home anywhere in Seattle or King County, we're glad to walk your specific house, talk through what your exposure actually looks like, and give you a straight answer — even if that answer is that a different product fits your budget better than what we install. Reach out for a free, no-pressure estimate and we'll tell you exactly what we'd do if it were our own house.