Lynden Siding Two Common Choices, One Climate That Tests Both
If you're pricing out a siding replacement in Lynden or anywhere else in Whatcom County, you've almost certainly run into two dominant options: vinyl and fiber cement. Both are sold as low-maintenance, both show up in nearly every contractor's brochure, and both can look good on a showroom sample. The problem is that a sample board doesn't tell you how a product behaves after ten winters of driving rain off the Nooksack Valley, a long gray moss season, and the salt-tinged air that rolls in from the Strait of Georgia and Bellingham Bay. That's the comparison that actually matters, and it's the one most sales literature skips.
We install only James Hardie fiber cement siding on the homes we work on. We don't install vinyl, and we think homeowners deserve to know exactly why before they sign a contract with anyone — us included. This page lays out what each product actually does well, where it struggles, and how those trade-offs play out on a house in this specific climate.
What Vinyl Siding Gets Right
Vinyl earned its market share honestly. It's not a bad product — it's a product with a specific set of strengths that make sense for certain budgets and certain homes.
- Lower upfront material cost compared to fiber cement, which matters on tight renovation budgets.
- Fast installation — panels are light and snap together quickly, which keeps labor costs down.
- No painting required out of the gate, since color is molded through the panel.
- Reasonably water-resistant as a surface material, since the panels themselves don't absorb moisture.
For a homeowner who plans to sell within a few years, or who needs the lowest possible entry price on a re-side, vinyl isn't an irrational choice. We're not going to pretend otherwise.
Where Vinyl Struggles in a Wet, Marine-Influenced Climate
It Moves With the Weather
Vinyl is a plastic product, and plastic expands and contracts with temperature swings more than fiber cement does. Whatcom County doesn't get extreme heat, but it does get sharp temperature drops overnight and cold snaps that stress the panels at their fastening points. Over years, that movement can loosen panels, warp them, or telegraph waviness across a wall that used to look flat.
Driving Rain Finds the Gaps
Vinyl siding isn't actually a sealed water barrier — it's designed to shed most water while relying on the house wrap and flashing behind it to manage what gets through the overlaps and seams. In a region where wind-driven rain is a regular winter event rather than an occasional storm, those seams see more water pressure than they were designed around in drier climates. The siding itself often looks fine while the sheathing behind it is quietly absorbing moisture.
Moss, Algae, and the Long Gray Season
Whatcom County's moss season isn't a few weeks — it's a good chunk of the year on shaded, north-facing walls and anywhere tree cover blocks the sun. Vinyl's textured surface and horizontal seams give algae and moss something to grip, and because the color is baked into the plastic rather than a separate coating, you can't simply repaint your way out of a green, streaked wall. Pressure washing helps but has to be done carefully, since aggressive washing can crack aging vinyl or force water behind the panels.
UV Fading and Brittleness
Vinyl color fades with UV exposure over time, and darker colors fade faster and more unevenly. As panels age, they also become more brittle in cold weather — a hard impact (a ladder, a stray branch, a thrown object) is more likely to crack a fifteen-year-old vinyl panel than a new one, and matching faded panels for a repair gets harder every year.
It's Not Repainted — It's Replaced
Because color is molded through the material, there's no realistic way to refresh vinyl siding's appearance short of replacing it. That's a meaningful difference from a product you can recoat when you're ready for a change.
What Fiber Cement Gets Right
James Hardie fiber cement is a cement, sand, and cellulose fiber composite — it's dimensionally stable, it doesn't expand and contract the way vinyl does, and it's manufactured to hold a factory finish for decades rather than a molded-in color.
- Non-combustible — fiber cement doesn't contribute fuel to a fire the way vinyl or wood products can.
- Dimensionally stable across temperature swings, which means straighter walls and fewer stress points at fasteners over time.
- ColorPlus factory finish is baked on and backed by its own finish warranty, resisting fade and chipping far better than field-applied paint.
- Climate-engineered HZ product lines — Hardie makes region-specific formulations (HZ5 for the Pacific Northwest's wet, moderate climate) engineered for moisture and freeze-thaw performance rather than a one-size-fits-all product.
- Resists moss and algae growth better than vinyl's textured plastic surface, and a painted or ColorPlus surface can be cleaned without the cracking risk of aging vinyl.
- Holds up to impact — it's heavier and denser, so it resists the dings and cracks that vinyl picks up over the years.
Fiber Cement's Real Trade-Offs
An honest comparison doesn't pretend fiber cement is free of downsides.
- Higher upfront material and labor cost than vinyl — it's a heavier, more involved product to install correctly.
- Installation quality matters more. Fiber cement has to be cut, fastened, and flashed to Hardie's published specifications — proper clearances, correct fastener patterns, and joint treatment all affect long-term performance. A rushed or untrained crew can undermine a good product.
- Heavier material means installation takes longer and requires more physical handling than snapping vinyl panels into place.
- Field-cut edges need proper sealing and priming per manufacturer spec, which adds steps a crew can't skip.
These trade-offs are exactly why installation quality is the deciding factor in whether fiber cement performs the way it's supposed to — a poorly installed Hardie job can fail just as badly as a poorly installed vinyl job, just for different reasons.
Side-by-Side: How They Actually Compare
| Factor | Vinyl Siding | James Hardie Fiber Cement |
|---|---|---|
| Material composition | PVC plastic, color molded through | Cement, sand, cellulose fiber; factory or field finish |
| Fire behavior | Combustible plastic | Non-combustible |
| Moisture behavior | Sheds water at surface; relies on WRB behind panels | Engineered HZ5 formulation for wet Pacific Northwest climate |
| Moss/algae resistance | Textured surface holds growth; cannot be repainted | Smoother finish sheds growth better; can be repainted when desired |
| Dimensional stability | Expands/contracts with temperature | Stable across temperature swings |
| Impact resistance | Becomes brittle with age and UV exposure | Denser, more resistant to cracking |
| Finish longevity | Fades with UV; not repaintable in practice | ColorPlus finish warranted separately; repaintable |
| Installation sensitivity | Lower — forgiving of minor installer error | Higher — must follow manufacturer spec for fastening and flashing |
| Typical upfront cost | Lower material and labor cost | Higher material and labor cost |
Cost Factors Worth Understanding
Pricing on any siding job depends on house size, wall complexity, trim detail, and existing conditions, so we won't quote fake numbers here. What's worth understanding is where the cost actually goes and how it plays out over time.
| Cost Factor | How It Plays Out |
|---|---|
| Material price per square | Vinyl is typically the lower-cost material; fiber cement costs more per square but carries a longer service life |
| Labor | Fiber cement takes longer to install correctly, which is reflected in labor pricing |
| Maintenance over 10-20 years | Vinyl needs periodic replacement of damaged panels and can't be refreshed with paint; fiber cement can be recoated when desired |
| Replacement cycle | Vinyl often needs full replacement sooner in wet, moss-prone climates; fiber cement, installed correctly, is built for a much longer service life |
| Resale consideration | Fiber cement is generally viewed as a stronger, more durable exterior upgrade by buyers and appraisers |
Why We Standardized on James Hardie
We made a decision a while back to install only James Hardie fiber cement and stop installing vinyl siding altogether. That wasn't a marketing choice — it came from seeing how each product actually performs on homes in this part of Whatcom County after a decade or more of salt air, driving rain, and moss season. We'd rather install fewer products well than offer every option and let quality vary by what a homeowner picks off a sample board.
Fiber cement, installed to Hardie's specifications with the right HZ5 product line for our climate, gives us a siding system we're willing to stand behind with a strong transferable warranty. That matters both for homeowners planning to stay long-term and for anyone thinking about resale down the road.
Questions to Ask Before You Decide
- Is the installer proposing a product line engineered for this climate, or a generic national spec?
- Will fasteners, clearances, and joint treatment follow the manufacturer's written installation guide?
- What does the warranty actually cover — material only, or labor and finish as well — and is it transferable if you sell?
- How does the product handle moisture behind the wall, not just at the surface?
- What will the siding look like — and cost to maintain — in 15 years, not just on install day?
If you're weighing your options for a siding replacement in Lynden or the surrounding area, we're happy to walk your home, point out what our climate has done to the existing siding, and give you a straight answer on what fiber cement would involve — no pressure, no obligation. Reach out for a free estimate using the form below.