Blaine Why We Made This Decision
Every siding contractor eventually has to decide what they're willing to put their name on. In Blaine, sitting right where the Strait of Georgia and Semiahmoo Bay meet, we made that decision years ago: James Hardie fiber cement is the only siding we install. Not because it's the cheapest option, and not because it's the only product on the market — it's because after years of tear-offs, warranty claims, and callback repairs on other materials in this specific climate, it's the one product line that consistently holds up to what Whatcom County throws at a house.
This isn't a knock on every homeowner who has vinyl, LP SmartSide, or cedar on their house right now. Plenty of those installations are doing fine. But when we're the ones responsible for the install, the flashing details, and the warranty behind it, we've narrowed our recommendation to one product family. Here's the honest reasoning.
What Blaine's Climate Actually Does to Siding
Blaine isn't a brutal climate in the way a mountain town or a desert is, but it's a slow, steady grind on exterior materials. Three things matter most:
Salt Air
Being this close to Semiahmoo Bay and the Strait means airborne salt is a constant, low-level presence, especially on west- and south-facing walls. Salt accelerates corrosion on exposed fasteners and metal trim, and it interacts poorly with some paint and coating systems, causing chalking and premature fade.
Driving Rain
Whatcom County doesn't just get rain — it gets wind-driven rain that pushes water sideways into laps, seams, and butt joints. A siding system that isn't engineered for that kind of water intrusion will eventually let moisture behind the cladding, and that's where real damage starts: sheathing rot, framing rot, mold.
Extended Moss and Mildew Season
Cool, damp, shaded conditions for much of the year mean moss, algae, and mildew get a long runway on any surface that holds moisture or lacks a factory-cured finish. Some siding materials are more hospitable to that growth than others, and once moss gets a foothold on a wall, it holds water against the surface even longer.
None of this is exotic weather. It's just persistent. And persistent conditions are exactly what expose the weak points in a siding product over a 10-, 15-, 20-year timeline — which is why our decision was based on long-term behavior, not how a product looks the day it goes up.
Why We Don't Install Vinyl Siding
Vinyl is inexpensive and low-maintenance in the sense that it doesn't need painting. But vinyl is a thin plastic product that expands and contracts significantly with temperature swings, which stresses seams and fastening over time. It's also more prone to becoming brittle and cracking in the kind of cold snaps Blaine occasionally gets, and it doesn't stop moss and mildew from taking hold on its surface. When it fails, it's typically a full re-side, not a repair. We simply don't think it's the right long-term investment for this coastline.
Why We Don't Install LP SmartSide
LP SmartSide is an engineered wood product, and to be fair, LP has improved its resin and coating technology significantly over the years. But it's still wood at its core, which means it's more vulnerable to moisture intrusion at cut edges, fastener penetrations, and butt joints than fiber cement is. In a market with this much driving rain, any product where the core material swells or degrades once water gets past the surface coating is a maintenance liability we don't want to be responsible for years down the road.
Why We Don't Install Other Fiber Cement Brands
Products like Cemplank and Allura are also fiber cement, and structurally the category is sound — that's part of why we like fiber cement as a material class. But we standardized on one brand for practical reasons: consistent quality control, a factory finish system we trust, a single warranty structure we understand inside and out, and predictable availability of matching trim and accessories for repairs down the line. Mixing brands or switching between jobs creates inconsistency in installation specs, fastening patterns, and warranty coverage — inconsistency we'd rather eliminate than manage.
Why We Don't Install Primed Wood or Cedar
Cedar has real appeal — it's a beautiful, traditional Pacific Northwest material, and painted or stained correctly, it can look great. But solid wood and primed spruce siding require an ongoing maintenance commitment: recoating, caulking, and moisture monitoring on a schedule most homeowners underestimate when they buy the house. In a climate with this much rain and this long a moss season, wood siding that falls behind on maintenance rots. We'd rather set expectations up front than sell a product that quietly requires more upkeep than most people plan for.
What James Hardie Gets Right
Climate-Engineered Product Lines
James Hardie makes region-specific formulations under its HZ5 designation for areas with more moisture and freeze-thaw exposure — which fits Western Washington. The fiber cement composition is engineered for this kind of climate rather than a one-size-fits-all national product.
ColorPlus Factory Finish
Rather than field-painting siding after installation, Hardie's ColorPlus system applies a baked-on finish at the factory under controlled conditions, which produces more consistent color, better fade resistance, and a stronger bond than most job-site paint applications. It also comes with its own finish warranty, separate from the substrate warranty.
Non-Combustible Core
Fiber cement is non-combustible, which matters increasingly in the Pacific Northwest as wildfire risk becomes a bigger part of insurance and building conversations, even in coastal counties.
Product Lines We Install
- HardiePlank lap siding — the most common profile, available in several exposure widths and textures
- HardiePanel vertical siding — for board-and-batten and modern facade styles
- HardieShingle — for a shingle-style look without the maintenance of cedar shakes
- HardieTrim — matching trim boards, fascia, and soffit accessories
Correct Installation Is Half the Product
Fiber cement's reputation is only as good as the install behind it. A significant share of the fiber cement problems we get called to inspect on other contractors' work trace back to installation shortcuts, not the material itself. The details that matter most:
| Detail | Why It Matters in Blaine |
|---|---|
| Fastener type and placement | Corrosion-resistant fasteners driven at the correct depth prevent premature fastener failure in salt air |
| Clearance from grade and roofing | Minimum clearances keep splashback and roof runoff from holding moisture against the bottom courses |
| Butt joint and seam treatment | Properly caulked and flashed joints are the main defense against wind-driven rain intrusion |
| House wrap and flashing integration | Siding is one layer of a water management system — it has to tie into flashing correctly, not just sit on top of it |
| Cut-edge sealing | Field-cut edges need sealant to match the factory-sealed edges, or moisture gets into the core |
The Warranty, Honestly Explained
James Hardie backs its siding with a transferable limited warranty on the substrate, and ColorPlus finishes carry their own separate finish warranty. Transferability matters more than people expect — it can be a genuine selling point if a homeowner sells within the warranty period. That said, warranties have installation requirements attached; that's part of why we're precise about following Hardie's published installation specs rather than improvising, since a warranty claim can be affected by how the product went on the wall.
What This Actually Costs
James Hardie siding costs more upfront than vinyl and is generally comparable to or somewhat more than engineered wood products, depending on the profile, trim package, and finish options chosen. The honest way to think about it isn't sticker price alone — it's cost per year of expected service life, factoring in that Hardie doesn't need repainting on the same schedule wood does and holds up better against the specific moisture and salt exposure this area sees. For an exact number on your home, that requires an actual measurement and product selection, not a generic estimate.
Questions to Ask Before You Choose a Siding Product
- How does this material perform after 15+ years of wind-driven rain, not just in the showroom?
- What's the real maintenance schedule — recoating, caulking, inspection — and am I prepared to keep up with it?
- Is the warranty transferable if I sell the house?
- What happens at cut edges and fastener penetrations if water gets past the surface?
- Does the installer follow the manufacturer's published specs, or their own shortcuts?
If you're weighing siding options for a home in Blaine or elsewhere in Whatcom County, we're happy to walk your property, look at your current siding's condition, and give you a straight answer on what we'd recommend and why — with no pressure to book anything on the spot.