Lynden Two Very Different Materials, One Big Decision
Vinyl siding and James Hardie fiber cement siding get compared constantly, and for good reason — they're the two most common choices homeowners in Whatcom County land on when it's time to re-side a house. But they aren't close cousins. One is an extruded plastic product engineered for low upfront cost and fast installation. The other is a cement-based composite engineered for durability, paint retention, and resistance to moisture and fire. Understanding that difference matters more in Lynden than in a lot of places, because our climate — salt-tinged air drifting in from the Sound, long stretches of driving rain off the Pacific, and a moss season that can run eight months out of the year — is exactly the kind of environment that exposes the weak points in a siding product over time.
This page lays out what each material actually does well, where vinyl runs into trouble locally, and why we made the decision years ago to install James Hardie exclusively and turn down vinyl siding jobs.
What Vinyl Siding Gets Right
We'll start with the honest case for vinyl, because it does have real advantages and homeowners deserve a straight answer, not a sales pitch dressed up as education.
- Lower material cost — vinyl is almost always the cheapest siding option on a bid sheet.
- Fast installation — panels are lightweight and snap together quickly, which shortens labor time.
- No repainting — the color is mixed into the plastic, so there's no paint film to maintain in normal conditions.
- Widely available — nearly every crew in the region can install it, and parts are easy to source for repairs.
For a homeowner on a tight budget who plans to sell within a few years, vinyl can be a reasonable, defensible choice. The trade-offs below are why we don't think it's the right long-term choice for most Whatcom County homes.
Where Vinyl Struggles in This Climate
Moisture Behind the Panel
Vinyl siding is installed loosely by design — it's meant to hang on the nail and expand and contract with temperature. That gap between the panel and the wall is fine in a dry climate, but in a region with as much wind-driven rain as Lynden gets, water can find its way behind panels at butt joints, corners, and around penetrations. Vinyl itself won't rot, but the wall sheathing and framing behind it can, quietly, for years before anyone notices.
Moss, Algae, and the Long Wet Season
Vinyl's smooth, non-absorbent surface actually holds surface moisture and organic debris in shaded, low-airflow areas — north-facing walls, under eaves, behind landscaping — which is common on Lynden lots backed against trees or fence lines. Once algae or moss gets a foothold on vinyl, it tends to spread across panel seams and stays until it's pressure-washed off, and aggressive washing can crack older or sun-brittled panels.
Thermal Movement and Impact
Vinyl expands and contracts noticeably with temperature swings, which is why installers have to leave slack in every panel. Over enough freeze-thaw cycles and temperature extremes, panels can warp, buckle, or pull away from J-channels. Vinyl also gets brittle in cold weather — a hard impact on a 35°F January morning (a stray branch, a ladder bump) is far more likely to crack a panel than the same impact in July.
Wind Exposure
Whatcom County gets its share of strong outflow wind events, and vinyl's biggest structural weakness is wind uplift — it's mechanically the least wind-resistant common siding material, rated by how well it stays fastened rather than how well it resists damage once a gust gets under an edge.
Fading and Appearance Over Time
Vinyl's color is baked through the material, but UV exposure still fades it — unevenly, since sun exposure varies by elevation. A south wall can visibly lighten compared to a shaded side within a decade, and because the color can't be refreshed with paint (most vinyl isn't rated for painting, and dark repaints can cause heat-related warping), the fix is usually a full re-side rather than a repaint.
How James Hardie Fiber Cement Is Built Differently
James Hardie siding is made from a mix of cement, sand, and cellulose fibers, cured into a rigid, dense plank or panel. It's installed tight to the wall with the manufacturer's specified nailing pattern and flashing details, rather than hung loose. That construction changes the entire risk profile:
- It doesn't expand and contract with temperature the way plastic does, so it holds its shape and its fasteners over decades.
- It's non-combustible, which matters for insurance considerations and simple peace of mind.
- It resists moss and algae growth far better than vinyl's smooth plastic surface, especially with proper standoff and drainage details at installation.
- It stands up to impact — hail, debris, ladders — without the cold-weather brittleness vinyl shows.
The HZ5 Product Line
James Hardie engineers its siding by climate zone, and the Pacific Northwest falls under the HZ5 designation — formulated specifically for regions with high moisture exposure and freeze-thaw cycling. That's a meaningful distinction from a one-size-fits-all product line, and it's part of why we consider Hardie the correct material choice for a Lynden address rather than just a premium one.
ColorPlus Technology
Most Hardie siding on our jobs goes on with a factory-applied ColorPlus finish — baked on in a controlled environment, not brushed on in the field or extruded through a pigment mix. It resists fading and chipping better than field-applied paint, and because it's a genuine paint finish rather than a colored plastic, touch-up and eventual repainting are both straightforward when the time comes — unlike vinyl, which typically can't be painted without voiding its warranty.
Side-by-Side Comparison
| Factor | Vinyl Siding | James Hardie Fiber Cement |
|---|---|---|
| Material cost | Lowest of common siding options | Mid-to-upper range |
| Moisture behavior | Won't rot, but can trap water behind panel | Installed tight with flashing details; engineered for wet climates (HZ5) |
| Moss/algae resistance | Smooth plastic holds surface moisture | Resists organic growth better with proper install |
| Cold weather durability | Becomes brittle, cracks on impact | Stable, no cold-brittleness |
| Wind resistance | Vulnerable to uplift in gusts | Fastened tight; far more wind-resistant |
| Fire rating | Combustible plastic | Non-combustible |
| Color longevity | Fades unevenly; can't be repainted | Factory ColorPlus finish resists fade; repaintable |
| Typical warranty | Prorated after early years, varies by manufacturer | Non-prorated, transferable manufacturer warranty |
Warranty Structure Matters More Than the Headline Number
Vinyl warranties often advertise long terms, but many are prorated — meaning the payout shrinks every year, and the fine print frequently excludes fading, warping, or installation-related failure. James Hardie's warranty on its siding products is non-prorated for the stated term and transfers to a new owner if the home sells, which matters in a market where re-siding is often a selling point rather than a hidden liability.
Installation Sensitivity: Both Products Punish a Bad Crew
It's fair to say neither vinyl nor fiber cement forgives sloppy installation. Vinyl hung too tight will buckle in the first heat wave; hung too loose, it rattles and lets water behind it. Hardie installed without correct clearances, fastener spacing, or flashing at penetrations can trap moisture against the board and cause problems at the joints. The difference is what happens when installation is done right: a correctly installed Hardie system is engineered to perform for decades in exactly the wet, mossy, salt-air conditions Whatcom County produces. A correctly installed vinyl system still carries the material's inherent limits — brittleness, fade, wind vulnerability — no matter how good the crew is.
What to Ask Any Siding Contractor
- Is the warranty prorated, and does it cover labor or just material?
- Does the product line account for this region's moisture and wind exposure, or is it a generic national spec?
- What's the manufacturer's documented installation method for flashing and clearances, and will the crew follow it exactly?
- Can the siding be repainted down the road, or is a full replacement the only refresh option?
- Is the warranty transferable if the home is sold?
Why We Only Install James Hardie
We stopped bidding vinyl siding jobs because we were seeing the same pattern on this side of the state: houses that looked fine at year five and showed real problems by year twelve — trapped moisture, moss buildup on shaded walls, wind-lifted panels after a strong outflow event, faded south walls next to still-bright north walls. None of that is a defect exactly; it's the material behaving the way plastic siding behaves in a wet, temperature-swinging, coastal-influenced climate. James Hardie's fiber cement system, installed to the manufacturer's spec with the HZ5 formulation and a ColorPlus finish, is what we've found actually holds up here without surprises. Standardizing on one product also means our crews install it constantly, know its details cold, and aren't relearning a different material's quirks on every job.
If you're weighing vinyl against fiber cement for a home in Lynden or anywhere else in Whatcom County, we're happy to walk your specific house — sun exposure, wind exposure, shaded walls — and talk through what each option would actually mean for you. Reach out for a free, no-pressure estimate.