Bellingham Exterior Two Very Different Materials, One Big Decision
If you're re-siding a home in Bellingham or anywhere in Whatcom County, you've almost certainly run into two competing answers: vinyl siding and fiber cement siding (the category James Hardie makes). Both show up constantly in bids from local contractors, and both have loyal followings. This page lays out how they actually compare — not the marketing version, the practical one — so you can make a decision that holds up after twenty winters of Pacific Northwest rain.
We'll say upfront where we stand: our company installs James Hardie fiber cement exclusively. We don't install vinyl. That's not because vinyl is a scam or a bad product for every application — it isn't — it's because after years of doing exterior work in this climate, we decided we'd rather stand behind one system we trust completely than split our crews and warranty support across two very different materials. Read on and you'll see why.
What Vinyl Siding Actually Is
Vinyl siding is an extruded PVC (polyvinyl chloride) plastic panel, usually formed to mimic a lapped wood profile. It's been the most common siding material in North America for decades because it's inexpensive to manufacture, light to ship and install, and never needs painting. Color is mixed into the plastic itself rather than applied as a finish coat.
What Vinyl Gets Right
- Lowest material and labor cost of any common siding option
- Never needs painting — color is through the material
- Lightweight, fast to install, forgiving of minor wall irregularities
- Reasonably good at shedding bulk water when installed correctly
Where Vinyl Struggles
Vinyl's honest weaknesses are well documented and worth taking seriously in a marine climate like ours. PVC becomes brittle in cold temperatures and can crack on impact — a stray branch, a ladder bump, a thrown object. It expands and contracts more than fiber cement with temperature swings, which over time can loosen fastening and cause visible waviness ("oil-canning") in the panels. It's also a hollow-back product, meaning it relies almost entirely on the water-resistive barrier and flashing behind it to keep moisture out, since the panel itself isn't a structural moisture barrier — it's designed to let water drain behind it, not stop it. In a region with 35-plus inches of annual rainfall and long stretches of damp, mossy weather, that drainage-dependent design puts a lot of pressure on perfect installation and ongoing upkeep behind the panel.
What Fiber Cement (James Hardie) Actually Is
Fiber cement is a composite of Portland cement, sand, and cellulose fiber, cured into dense, rigid boards or planks. James Hardie is the manufacturer we install, and their HZ5 product line is engineered specifically for climates like ours — freeze-thaw cycling, sustained moisture, and salt-influenced air near the water. The boards come with a factory-applied ColorPlus finish baked on under controlled conditions, rather than field-painted.
What Fiber Cement Gets Right
- Non-combustible — it won't ignite, melt, or contribute fuel to a fire
- Dimensionally stable — resists warping, cracking from temperature swings, and cupping
- Dense enough to resist impact and pest damage far better than vinyl or wood
- Factory finish holds color and resists fading longer than field-applied paint
- Backed by a strong, transferable manufacturer warranty when installed to spec
Where Fiber Cement Costs More
Fiber cement is heavier, requires specific fastening patterns, factory-primed and finished cut edges, and correct clearances from grade, decks, and roof lines. It costs more upfront in both material and labor because the installation is less forgiving — done wrong, you lose a lot of the product's advantages. That's precisely why installer quality matters more with fiber cement than with vinyl, and why we're selective about crew training on every Hardie job.
Head-to-Head Comparison
| Factor | Vinyl Siding | James Hardie Fiber Cement |
|---|---|---|
| Upfront cost | Lowest | Moderate to higher |
| Fire resistance | Combustible plastic | Non-combustible |
| Impact resistance | Cracks/brittles, especially cold | Dense, resists impact |
| Moisture handling | Relies on drainage plane behind panel | Rigid board, less prone to trapped moisture warping |
| Color longevity | Molded-in color can fade/chalk over time | Factory ColorPlus finish, long fade resistance |
| Maintenance | Occasional cleaning, watch for cracks/gaps | Occasional cleaning, repaint only if not ColorPlus |
| Typical lifespan | 20-30 years | 30-50+ years installed to spec |
| Resale/appraisal perception | Viewed as standard/economy | Often viewed as an upgrade material |
Why Bellingham's Climate Tips the Scale
This comparison plays out differently depending on where you live, and Whatcom County has a specific set of conditions worth naming directly. Homes near Bellingham Bay and out toward Chuckanut and the county's shoreline neighborhoods deal with salt-laden air that accelerates corrosion of fasteners and trim, and that same moisture load feeds a long moss season that keeps north-facing walls and shaded siding damp for weeks at a stretch. Add driving, wind-blown rain off the Sound and the Cascade foothills, and you have a climate that's constantly testing whatever is on the wall.
Vinyl can perform fine here if installation is precise and the drainage plane behind it is never compromised — but "never compromised" over 25 years, through settling, remodels, and the occasional installer shortcut, is a tall order. Fiber cement's rigidity and factory finish are simply better suited to shrugging off that kind of sustained, low-grade moisture exposure, which is a core reason we standardized on it for every siding job we take on in this region.
Installation Sensitivity: The Part Both Materials Share
Here's something honest that applies to both products: siding failures in this climate are far more often installation failures than material failures. Vinyl installed with poor flashing, missing weep holes, or nailed too tight will trap water and fail early regardless of the panel quality. Fiber cement installed without correct fastener spacing, unsealed cut edges, or proper clearance from grade will have its own problems — trapped moisture at the base, paint failure at cut ends, or cracking from over-driven nails.
The difference is what happens when installation is good but not perfect. Fiber cement's material properties give you more margin for error over decades of weather exposure. Vinyl's thinner, more moisture-dependent design gives you less. That margin is a big part of why we only put our name behind one system.
Cost Over Time, Not Just Upfront
Vinyl wins on day-one price, no argument. But the honest comparison has to include the whole ownership period. Vinyl siding installed today will likely need replacement, or at minimum significant panel and trim repair, within 20-30 years — sooner if it's been through repeated impact damage or UV-heavy southern exposure. Fiber cement installed to spec with a factory finish is realistically a once-in-a-homeownership decision for most people, backed by a manufacturer warranty that's transferable if you sell.
When you annualize the cost rather than just comparing the invoice total, the gap narrows considerably — and for homeowners planning to stay put for decades, or for anyone who values not thinking about their siding again, fiber cement usually comes out ahead.
Questions to Ask Before You Decide
- How long do you plan to own this home? (Under 10 years favors lower upfront cost; longer favors durability)
- Is your home exposed to direct impact risk — kids, sports, tree branches, a busy street?
- Does your lot get salt air or persistent shade/moss buildup?
- Do you want a factory-cured finish, or are you comfortable with a material that may need repainting?
- Are you comparing bids that specify the actual Hardie product line (HZ5, HZ10) versus generic "fiber cement" or "vinyl" with no brand named?
- Does the installer's warranty match what the manufacturer offers, or is it shorter?
Where We Land — and Why
Vinyl siding is a legitimate, widely used product, and plenty of homes wear it fine for a couple of decades. But given what Bellingham and Whatcom County weather does to a home's exterior year after year — the salt air, the driving rain, the moss — we made the call to install James Hardie fiber cement exclusively. It's non-combustible, dimensionally stable, factory-finished, and backed by a strong transferable warranty, and in our experience it holds up to this specific climate better than any alternative we've worked with. We'd rather do one thing at a high standard than offer a cheaper option we can't fully stand behind.
If you're weighing siding options for a home in Bellingham or anywhere in Whatcom County, we're happy to walk your property, look at your exposure and sun/shade patterns, and give you a straight answer about what makes sense — no pressure, no hard sell. Reach out for a free estimate using the form below.