Bellingham Two Very Different Materials, One Big Decision
If you're re-siding a home in Bellingham, you've almost certainly narrowed your choices down to two finalists: vinyl siding and fiber cement siding. Both are widely available, both come in dozens of colors, and both get installed on homes all over Whatcom County every year. But they are not close cousins — they're built from completely different materials, they age in completely different ways, and they hold up to our climate very differently. This page walks through the honest differences, not the sales-brochure version.
We'll say up front: we install James Hardie fiber cement exclusively, and we'll explain why toward the end. But this comparison is written to be useful even if you end up going a different direction — you should understand what you're actually buying before you sign a contract.
What Each Material Actually Is
Vinyl Siding
Vinyl siding is an extruded PVC (polyvinyl chloride) plastic product, formed into panels that interlock and hang on the wall. It's lightweight, relatively inexpensive, and has been a mainstream siding choice since the 1970s. Color is mixed into the plastic itself rather than applied as a coating, and modern vinyl comes in a wide range of profiles meant to mimic wood lap siding, shakes, or board-and-batten.
Fiber Cement (James Hardie)
Fiber cement is a composite of Portland cement, sand, and cellulose fiber, cured into rigid boards or panels. It's non-combustible, dimensionally stable, and heavy compared to vinyl — a single 12-foot lap board weighs several times what a comparable vinyl panel does. James Hardie factory-applies its ColorPlus finish under controlled conditions, which is a meaningfully different process than field-painted wood or standard fiber cement primer coats.
How They Perform in Bellingham's Climate
This is the part that actually matters for a Whatcom County home. We're not comparing these products in a lab — we're comparing them against salt air rolling off Bellingham Bay, driving wind-driven rain off the Strait, and the long gray moss season that runs from fall through spring.
Moisture and Rain
Vinyl siding isn't a water barrier by itself — it's designed to shed the majority of bulk water while relying on the house wrap and flashing behind it to manage what gets through the seams and laps. Vinyl doesn't rot, but it also doesn't hold its shape well against wind; older or lower-gauge vinyl can rattle, bow, or blow off in a hard coastal wind event. Fiber cement is heavier and more rigid, which helps it resist wind uplift, and it doesn't degrade from prolonged dampness the way wood-based products do. Neither product is "waterproof" — correct water-resistive barrier and flashing work behind either one is what actually keeps a wall assembly dry.
Moss, Algae, and Grime
Our long wet season grows moss and algae on almost any exterior surface that stays shaded and damp, siding included. Vinyl's smooth plastic surface sheds it reasonably well but can show green streaking at panel laps and under eaves over time. Hardie's factory-cured cement surface and ColorPlus finish also collect surface growth in shaded, damp spots — no siding is immune to moss in this climate — but it holds up to pressure washing and gentle cleaning without the surface chalking or fading the way some vinyl does after repeated cleaning cycles.
Salt Air and UV
Homes closer to Bellingham Bay and the Strait see more airborne salt than homes further inland in the county. Salt air doesn't rot or corrode either siding material directly, but it accelerates fastener corrosion and finish breakdown. Vinyl's color is baked into the plastic, so it doesn't peel, but UV exposure over 15-20 years does cause fading and increasing brittleness, especially on south and west-facing walls. ColorPlus finish is engineered with UV-resistant resins and has a longer factory finish warranty specifically because Hardie tests it against sun and weather exposure.
Head-to-Head Comparison
| Factor | Vinyl Siding | James Hardie Fiber Cement |
|---|---|---|
| Material | PVC plastic | Cement, sand, cellulose fiber |
| Combustibility | Melts/deforms under heat, contributes fuel load | Non-combustible |
| Impact resistance | Can crack or shatter in cold weather, hail, debris | Resists impact well when installed to spec |
| Wind performance | Can rattle, bow, or dislodge in high wind | Heavier, more rigid, better wind resistance |
| Color/finish | Color mixed into plastic; fades and can look "plasticky" up close | Factory-baked ColorPlus finish; more matte, wood-like texture |
| Moisture behavior | Doesn't rot but relies fully on barrier behind it | Doesn't rot; dimensionally stable when properly sealed at cuts |
| Typical upfront cost | Lower material and labor cost | Higher material and labor cost |
| Warranty | Often prorated after early years | Long-term, often transferable non-prorated warranty on both product and finish |
| Repainting | Can be painted but voids some warranties; rarely needed for color | Factory finish typically lasts many years before repaint is considered |
Cost: The Real Trade-Off
Vinyl's biggest honest advantage is upfront price. It's lighter, faster to install, and the material itself costs less per square foot than fiber cement. For a homeowner on a tight budget doing a quick refresh, that's a real consideration and we won't pretend otherwise.
Fiber cement costs more going in — both material and labor, since it's heavier, requires different fastening and cutting tools, and takes more time to install correctly. The trade-off is a siding system built for a 30-50+ year service life with a factory finish that's warranted to hold its color, rather than a product where the main long-term maintenance cost is eventual full replacement once the plastic becomes brittle or badly faded.
What to Weigh Beyond the Sticker Price
- How long do you plan to own the home — a quick flip versus a forever house changes the math
- Whether you want to repaint at some point, or want a finish designed to avoid that for a long time
- How exposed your specific walls are to wind, driving rain, and direct salt air
- Whether fire resistance matters to you given wildfire smoke seasons and insurance considerations
- Resale expectations — appraisers and buyers increasingly recognize fiber cement as a premium, durable material
Installation Sensitivity
Both products are only as good as their installation. Vinyl siding installed too tightly (not accounting for thermal expansion) will buckle; installed too loosely, it rattles in wind. It also needs correct starter strips, J-channel, and flashing at every penetration, or water finds its way behind it.
Fiber cement has its own installation requirements: proper fastener spacing and type, correct clearance from grade and roofing, sealed and painted cut edges (factory finish doesn't extend to a field cut unless it's touched up correctly), and manufacturer-specified overlaps. Installed wrong, either product will underperform regardless of what the material is capable of on paper. This is why we treat installation to manufacturer spec as non-negotiable, not a nice-to-have.
Fire and Wildfire Smoke Season Considerations
Western Washington's wildfire smoke seasons have gotten more homeowners thinking about home-hardening, even outside classic wildfire-interface zones. Vinyl siding will soften, deform, and melt under significant heat exposure. Fiber cement is non-combustible by composition — it won't contribute fuel to a fire the way vinyl or wood siding can. For homes near dry brush, treed lots, or anywhere embers could land, this is a real, material difference, not a marketing point.
Where This Leaves Bellingham Homeowners
Vinyl siding is not a bad product — it does what it's designed to do at a lower price point, and there are legitimate reasons some homeowners choose it. But given what our walls actually face here — salt-laden wind off the water, sustained wet seasons, driving rain, and months of moss-friendly gray weather — we made the call as a company to install only James Hardie fiber cement. It's non-combustible, holds its factory finish for the long haul, stands up to wind and impact better than plastic siding, and comes with a strong transferable warranty backed by a manufacturer that engineers specific product lines for wet coastal climates like ours (their HZ5 line, for example, is built with moisture and freeze-thaw performance in mind).
We'd rather install one product very well than offer several and cut corners on any of them. That standardization also means our crews are deeply practiced on Hardie's fastening, clearance, and finish requirements — consistency that matters when the whole point of siding is to protect the house behind it for decades.
A Quick Checklist Before You Decide
- Get quotes for both materials so you're comparing real numbers, not estimates from memory
- Ask any contractor what warranty actually covers — material only, or finish and labor too
- Confirm how exposed your home is to wind and driving rain from the water side
- Ask how cut edges and penetrations will be sealed and finished, regardless of material
- Think in decades, not just the next few years, when weighing upfront cost against lifespan
If you're weighing fiber cement against vinyl for a home in Bellingham or anywhere in Whatcom County, we're glad to walk your specific house with you, point out where wind and moisture exposure are highest, and give you a straight answer on what it would take to do the job right. Reach out for a free, no-pressure estimate — there's no obligation and no pressure to choose one material over another before you've seen the numbers for your own home.