Blaine Siding One Product, One Standard
Walk into most siding companies in Whatcom County and you'll get a menu: vinyl if you want cheap, LP SmartSide if you want a wood look on a budget, fiber cement if you want to spend more. We don't offer a menu. Every home we side gets James Hardie fiber cement, installed to Hardie's written specifications. That's it.
We didn't start out that way. Like most contractors, we used to install whatever the homeowner picked. Over years of tear-offs, warranty calls, and re-siding jobs on houses that were only 12-15 years old, a pattern showed up: the callbacks and the early failures almost never involved Hardie product installed correctly. They involved other materials, or Hardie installed wrong. So we narrowed our offering to the one system we could stand behind completely, on every house, without hedging.
This page explains what James Hardie siding actually is, why it holds up in a Blaine climate specifically, what it costs relative to alternatives, and what correct installation looks like — so you can evaluate our recommendation instead of just taking our word for it.
Why Blaine's Climate Is a Real Factor, Not Marketing Copy
Blaine sits at the northwest corner of Whatcom County, right on Semiahmoo Bay and the Strait of Georgia. That location isn't neutral for exterior siding. Three things stack up against a house here:
- Salt air. Airborne salt off the water accelerates corrosion on fasteners, trim, and any material that isn't dimensionally stable, and it degrades cheap finishes faster than inland exposure would.
- Driving rain. Winter storms off the Strait push rain sideways, not straight down. That means siding laps, butt joints, and penetrations take on water pressure that a fair-weather installation detail won't handle.
- A long moss and mildew season. Blaine's wet, mild winters and shoulder seasons keep surfaces damp for months at a stretch. Anything organic — wood, wood-based composites, or paper-faced products — is on the clock from day one.
None of that makes siding impossible here. It just means the margin for error is smaller than it is in a dry climate, and the material itself matters more.
What "Climate-Engineered" Actually Means
James Hardie makes region-specific formulations under its HZ5 designation for the Pacific Northwest, engineered for high-moisture, freeze-thaw conditions. The point isn't a marketing label — it's that the cement formulation and moisture-management engineering are matched to what this coastline actually does to a house over 20-30 years, rather than a generic national spec.
What James Hardie Siding Is
Fiber cement is a mix of Portland cement, sand, and cellulose fiber, cured and pressed into boards. It's not plastic (like vinyl) and it's not wood or a wood composite (like LP SmartSide or cedar). That composition is why it behaves differently in wet, salty, moss-prone conditions:
- It doesn't rot, delaminate, or feed fungal growth the way wood-based products can if moisture gets behind them.
- It's non-combustible — a real consideration as wildfire smoke and ember exposure has become a more common summer concern even west of the Cascades.
- It holds paint and factory finish far longer than wood, because it doesn't expand and contract with moisture the way wood fiber does.
- It resists dents, pecking birds, and impact damage better than vinyl, which cracks and chalks in UV and cold.
The trade-off, and we tell every customer this upfront: it's heavier, it requires proper fastening and blocking, it needs to be cut with the right tools and dust controls, and it costs more than vinyl and most engineered wood siding. It rewards a contractor who installs it correctly and punishes one who doesn't — more on that below.
The Hardie Product Lines We Install
| Product Line | Best For | Look |
|---|---|---|
| HardiePlank lap siding | Most Blaine homes — the default choice | Traditional horizontal lap, smooth or cedar-textured |
| HardiePanel vertical siding | Board-and-batten style, accent walls, garages | Vertical panels with batten strips |
| HardieShingle | Gable accents, Craftsman and cottage-style homes | Staggered or straight-edge shingle profile |
| HardieTrim | Corners, fascia, window and door trim | Smooth or textured, paired with any of the above |
For most Blaine houses we default to HardiePlank in a ColorPlus finish, using HardieTrim to close out corners and openings. The panel and shingle lines come into play on specific architectural styles or accent areas rather than as whole-house solutions.
ColorPlus Factory Finish vs. Field Painting
James Hardie offers two finish options: primed boards you paint after installation, or ColorPlus, a baked-on factory finish applied and cured under controlled conditions before the boards ever reach the job site. In a climate with as much damp shoulder-season weather as Blaine gets, field-painted siding is harder to get right — paint needs a dry substrate and stable temperatures to cure properly, and the weather window here can be narrow. ColorPlus sidesteps that entirely and typically carries a longer, separate finish warranty than field-applied paint. We recommend it on nearly every job.
Why We Don't Install the Alternatives
Vinyl Siding
Vinyl is inexpensive and low-maintenance in mild climates, and we're not going to pretend otherwise. But it's a thin plastic product that expands and contracts significantly with temperature swings, which means installers have to leave it "loose" on the nail hem — a detail a lot of crews get wrong. In driving rain and wind off the Strait, that same flexibility and the way vinyl laps are engineered can let water track behind the panels more easily than a rigid material would. It also chalks, fades, and becomes brittle over time, especially with UV and cold cycling, and it's not repairable in the way fiber cement is — a cracked panel usually gets replaced, and matching faded color years later is difficult.
LP SmartSide and Other Engineered Wood
LP SmartSide is a legitimate product with a real warranty and better performance than raw wood siding. It's made from wood strand material bonded with resin, which is a meaningful improvement over solid wood — but it's still wood-based, which means moisture is the thing that ends its life early if any water gets behind the cladding or into a cut edge that wasn't sealed correctly. In a climate with Blaine's rain and humidity, we've simply seen too much of the difference in real-world longevity between fiber cement and any wood-based product, engineered or not, to install it as our standard.
Cemplank, Allura, and Primed Spruce
Cemplank and Allura are also fiber cement, made by different manufacturers, and they're not fundamentally bad products. Our decision to standardize on Hardie over them comes down to the depth of the climate-specific HZ engineering, the length and structure of the transferable warranty, and consistency of ColorPlus finish quality — factors that matter over a 30-year ownership window, not a defect in the competing product. Primed spruce lap siding is the traditional wood option and it can look great, but it demands a maintenance commitment — regular repainting, caulking, and moisture vigilance — that most homeowners underestimate until the first signs of rot show up at the butt joints.
What Correct Hardie Installation Actually Requires
Fiber cement siding's reputation depends entirely on installation quality. A poorly installed Hardie job can fail faster than a well-installed vinyl job. The details that matter most:
- Proper clearance and flashing. Siding needs the correct gap above rooflines, decks, and grade, with flashing that actually directs water away from the wall assembly.
- Correct fastener pattern and type. Hardie specifies fastener placement, penetration depth, and corrosion-resistant fastener types — critical in a salt-air environment where the wrong fastener corrodes and stains the face of the board.
- Butt joint treatment. Every horizontal joint is a potential water entry point; joints need to be flashed or sealed per spec, not just butted and caulked.
- Rainscreen or drainage plane. A ventilated gap behind the siding lets incidental moisture drain and dry instead of sitting against the sheathing — increasingly standard practice in wet Pacific Northwest climates.
- Cut-edge sealing. Factory-finished boards expose raw material at every cut; those edges need to be sealed to maintain the water and finish warranty.
James Hardie's transferable warranty is only as good as the installation underneath it — a warranty claim can be denied over installation defects. That's the real argument for using a contractor with Hardie-specific training and a track record, not just a general siding crew adding it to their list of services.
Cost Factors to Expect
| Factor | Why It Moves the Price |
|---|---|
| Material line and finish | ColorPlus costs more than primed board; HardieShingle detail work costs more than plain lap |
| Tear-off and substrate condition | Rot or damaged sheathing found under old siding adds repair scope before new siding goes on |
| Trim and architectural detail | Multiple gables, dormers, and corner details add labor beyond flat wall footage |
| Rainscreen/drainage plane | Adds material and labor but is worth it in Blaine's rain exposure |
| Site access | Waterfront and hillside lots common around Blaine can add staging and scaffolding cost |
We won't quote a number on this page — every house is different — but we'll give you a written, itemized estimate that breaks out material, tear-off, and labor so you can see exactly what you're paying for.
A Simple Homeowner Checklist
- Ask any contractor whether they're installing to Hardie's written specifications, not just "Hardie siding."
- Ask what fastener type and pattern they use, and why, for a coastal environment.
- Ask whether a rainscreen/drainage plane is included or optional.
- Get the warranty terms in writing — both the product warranty and what voids it.
- Ask how they handle sheathing repair if rot is found once old siding comes off.
If you're weighing siding options for a home in Blaine or elsewhere in Whatcom County, we're happy to walk your house, point out what your existing siding is telling us, and give you a straightforward, no-pressure estimate for a James Hardie install — no upsell to a product we wouldn't put on our own homes.