Lynden Siding A Simple Policy, and the Reason Behind It
Homeowners sometimes ask why we don't offer a lineup of siding brands the way some contractors do. The answer is straightforward: we install James Hardie fiber cement siding, and nothing else. Not vinyl, not LP SmartSide, not primed spruce or cedar lap, not other fiber cement brands like Cemplank or Allura. This isn't a marketing gimmick or an exclusive dealer arrangement we're required to promote. It's a standard we set for ourselves after years of installing, repairing, and tearing off siding on homes across Lynden and the rest of Whatcom County.
When you narrow your business to one product, you're making a bet that the product is worth defending. We think James Hardie earns that bet in this specific climate, on this specific coastline, under these specific weather patterns. This page explains the reasoning in plain terms — what our regional weather does to a wall, why we stopped installing certain alternatives, and what Hardie's product system actually offers in return.
What Whatcom County Weather Does to a Wall
Lynden sits inland from Bellingham Bay and the Salish Sea, in farm country near the Canadian border, but it still lives inside a maritime climate that is tough on exterior building materials. Three things drive most of the siding failures and premature repaints we get called out for.
Salt Air From the Sound
Whatcom County's proximity to Puget Sound and the Strait of Georgia means salt-laden air moves inland further than most homeowners expect, especially during winter storm systems. Salt air accelerates corrosion of fasteners and metal trim, and it degrades certain coatings and finishes faster than they'd wear in a dry inland climate. Siding that isn't engineered with this in mind tends to show it first at seams, corners, and fastener heads.
Driving Rain and Wind-Driven Moisture
Pacific storm systems don't just drop rain straight down here — they push it sideways into walls, soffits, and window trim. Any siding product with weak seams, poor water-shedding detail, or a tendency to absorb and hold moisture is going to struggle over a 20- or 30-year timeline in this kind of weather. This is where the difference between a good installation and a great one shows up years later, usually as soft trim, staining, or delamination.
The Long Moss Season
Whatcom County's combination of moisture, mild temperatures, and shade from mature trees creates a moss and algae season that runs much longer than in drier parts of the country. Organic growth on siding isn't just cosmetic — it holds moisture against the surface and, on materials sensitive to that, can accelerate wear over time. A siding product's surface chemistry and finish matter here as much as its structural design.
Why We Narrowed Our Options to One Product
Every siding material on the market makes a set of trade-offs. We're not going to tell you a competing product is junk — most of them perform reasonably well when installed correctly in the right climate. What we will say is that after enough service calls and enough teardowns of siding that failed early, we found ourselves recommending the same product over and over, and eventually decided to just build our business around it.
| Factor | What Matters in This Climate | Where Hardie Stands |
|---|---|---|
| Moisture behavior | Long wet season, wind-driven rain | Fiber cement doesn't rot or absorb moisture the way wood-based products can |
| Combustibility | Wildfire smoke seasons increasingly reach Western Washington | Non-combustible fiber cement composition |
| Finish durability | Salt air and long moss season stress coatings | Factory-baked ColorPlus finish engineered for UV and moisture exposure |
| Dimensional stability | Freeze-thaw cycles and seasonal humidity swings | Fiber cement expands and contracts far less than wood or engineered wood products |
| Warranty structure | Homeowners want protection that survives a sale | Non-prorated, transferable coverage on the product |
None of this means every alternative product is a bad choice everywhere. It means that, for the specific mix of salt air, rain, and moss we deal with here, we stopped seeing a reason to install anything else.
What James Hardie Actually Is
Fiber Cement Composition
James Hardie siding is made from a mix of Portland cement, sand, and cellulose fiber, cured into rigid boards and panels. Because it's cement-based rather than wood-based, it doesn't have the same vulnerability to rot, insect damage, or moisture-driven swelling that wood and wood-composite sidings can have. It also doesn't burn the way wood-based siding does, since fiber cement is non-combustible.
HZ5 — Engineered for This Region
James Hardie makes different formulations of its products for different climate zones across the country, sold under an "HZ" (HardieZone) designation. HZ5 is the formulation engineered for regions with more moisture, freeze-thaw activity, and humidity swings — which describes Western Washington well. Using the climate-matched formulation, rather than a generic version of the product, is part of why we consider Hardie appropriate for Lynden specifically rather than just "siding in general."
The ColorPlus Factory Finish
One of the most important differences between Hardie siding and a raw or site-primed product is the finish. ColorPlus is a multi-coat color system baked onto the board at the factory under controlled conditions, rather than sprayed or brushed on site after installation. A few practical effects of that:
- Consistent color and coverage across every board, without the thin spots or lap marks that can happen with field-applied paint
- Better adhesion, since the coating is cured onto the fiber cement substrate rather than applied over dust, weather, and job-site conditions
- A longer stretch before repainting is needed, which matters when a home sits under moss-heavy tree cover for months at a time
- Touch-up product available that's formulated to match the factory color, rather than guessing at a paint match years later
Products that ship primed but unfinished — including some fiber cement competitors and engineered wood sidings — put the finish quality in the hands of whoever paints it on site, on whatever day the weather cooperates. That's one more variable we'd rather not gamble on for a 30-year exterior.
Product Lines We Install
James Hardie isn't a single product — it's a system of lines built for different looks. We install the full range, matched to the home's architecture rather than pushing one style on every job.
| Line | Look | Common Use |
|---|---|---|
| HardiePlank Lap | Traditional horizontal lap siding | Most common choice for full re-sides and new construction |
| HardiePanel | Vertical panel siding | Farmhouse, board-and-batten, and accent applications |
| HardieShingle | Staggered or straight-edge shingle profile | Craftsman and cottage-style homes |
| HardieTrim | Fascia, corner boards, and window/door trim | Finishing detail on every job, regardless of siding line |
| HardieSoffit | Pre-vented and non-vented panels | Eave and overhang protection, matched to the siding system |
Texture and Color Options
Within each line, Hardie offers smooth and woodgrain-textured surfaces, and a curated ColorPlus palette designed to work together across siding, trim, and accent pieces. We can walk through physical color samples on site — photos and screens don't render these finishes accurately, especially under Northwest overcast light, which looks different than direct sun.
The Warranty Behind the Product
James Hardie backs its products with a non-prorated limited warranty that's transferable to a new owner if you sell the home within the coverage period — which matters in a market where siding replacement is often a selling point, not just a maintenance item. The ColorPlus finish carries its own separate finish warranty, since the coating and the substrate are engineered and warrantied as a system.
Warranty coverage on any siding product is only as good as the installation underneath it. Improper fastening, wrong nail placement, insufficient clearance from grade or decking, or skipped flashing details can void manufacturer coverage regardless of how good the product is. That's the next piece.
What Correct Installation Involves
A lot of the real-world performance difference between two houses with the "same" siding comes down to installation, not the product itself. James Hardie publishes detailed installation specifications, and following them isn't optional if you want the warranty to mean anything. On every job we handle, that includes:
- Manufacturer-specified fastener type, length, and placement — not whatever happens to be in the nail gun
- Proper clearance between the bottom of the siding and grade, decks, patios, and roof lines to keep splash-back moisture off the board
- Correct house wrap and flashing integration at windows, doors, and penetrations, so water is directed out rather than trapped behind the siding
- Approved caulking and sealant products at joints, matched to the ColorPlus finish system
- Proper joint and butt-seam treatment so panels aren't left to wick moisture at the cut edges
- Field-cut edge treatment with touch-up paint so unfinished cut ends aren't left exposed
Skipping any of these isn't a small shortcut — it's usually the exact detail that shows up as a moisture problem five or ten years later, right around when a homeowner assumes their siding should still be trouble-free.
What This Means for Your Home in Lynden
If you're comparing quotes and one contractor is offering vinyl, another is offering LP SmartSide, and we're only offering James Hardie, that's not us trying to steer you toward a higher price point — fiber cement is a material and labor investment, and we're upfront about that. It's us telling you plainly that, for a house that has to stand up to salt-tinged coastal air, sideways winter rain, and months of shaded moss growth every year, this is the product we're willing to put our name behind and warranty our workmanship on.
We're happy to talk through your specific home — its exposure, its architecture, its existing siding condition — and give you a straight answer about what a Hardie re-side would look like and cost. If you'd like a free, no-pressure estimate, use the form below and we'll get in touch.