Sudden Valley A Question We Get Asked Often
Homeowners in Sudden Valley call us for a lot of reasons — a failing 25-year-old siding job, a remodel, storm damage along the lake-facing side of a house. Vinyl siding comes up in almost every one of those conversations, usually because it's the cheapest bid on the table. We understand why it's tempting. But we made a decision years ago to install only James Hardie fiber cement siding, and we don't carry vinyl as an option, even when a customer asks for it by name. This page explains why, honestly and without the sales pitch, so you can make your own informed call.
This isn't about vinyl being a scam or a bad product in every setting. It has a place in a lot of the country. Our position is narrower: given what a house on Lake Whatcom, in Sudden Valley, or anywhere else in this corner of Whatcom County has to deal with year-round, we don't think vinyl is the material that gives our customers the best outcome over 20-plus years. That's a professional judgment, not a knock on every vinyl installation everywhere.
What Vinyl Siding Actually Gets Right
Fair is fair. Vinyl earned its market share for real reasons:
- Low upfront cost. It's typically the least expensive siding material per square foot, both in materials and labor.
- No painting. The color is molded through the panel, so there's no paint film to fail — at least not in the way painted wood fails.
- Light weight. Easy to handle, easy to ship, easy to install quickly on a straightforward wall.
- Wide color and profile selection. Manufacturers offer a lot of options at the budget end of the market.
If your priority is the lowest possible sticker price and you're planning to sell or move within a decade, vinyl isn't an irrational choice for a lot of homes. We just don't think it's the right long-term choice for the homes we build for here.
Where Vinyl Struggles in This Specific Climate
Sudden Valley sits on Lake Whatcom, close enough to the Puget Sound weather patterns to get driving, wind-blown rain off and on most of the year, plus a long moss and mildew season that runs from fall through spring. Add the salt-tinged marine air that moves inland from Bellingham Bay and the Strait of Georgia, and you've got a climate that's harder on exterior materials than the sunbelt conditions a lot of vinyl products are engineered and tested in.
Thermal Movement
Vinyl is a plastic (PVC) product, and plastic expands and contracts with temperature swings far more than fiber cement or wood. Panels are hung with slotted nail holes specifically so they can move. When a wall gets full sun exposure and then a fast temperature drop — which happens here — that expansion and contraction cycle repeats thousands of times over the life of the siding. Over years, that movement is what causes the ripples, buckling, and gaps you see on older vinyl jobs.
Wind and Driving Rain
Vinyl panels rely on an overlapping, interlocking design rather than a fully sealed surface. In a straight, gentle rain that's not a problem. In the sideways, wind-driven rain that comes through Whatcom County off the water, water can be pushed up and under the laps, especially around corners, window trim, and anywhere the installation wasn't done with extra care. Vinyl itself won't rot from that moisture — but what's behind it can.
Cold-Weather Brittleness
Vinyl gets more brittle as temperatures drop. We don't get extreme cold most winters, but Sudden Valley does see hard frosts and the occasional freeze, and impacts that would just dent a warmer panel — a wind-thrown branch, a ladder bump — can crack a cold one.
Moss, Algae, and the Cleaning Cycle
The same damp, shaded conditions that make this a beautiful, green part of the state are exactly what moss and algae need to take hold on north-facing and tree-shaded walls. Vinyl's textured, low-gloss finish gives spores something to grip, and unlike a factory-baked finish with fungicidal additives, most standard vinyl needs regular power-washing to keep it looking clean — done wrong, that pressure washing is itself a common way water gets forced behind the panels.
The Installation Sensitivity Problem
A lot of vinyl's real-world failures don't come from the material itself — they come from how forgiving-looking but actually unforgiving it is to install. Vinyl has to be hung loose enough to expand and contract, nailed in the exact center of the slot (never snug), and flashed correctly at every seam, corner, and penetration. Get any of that wrong and the siding can look fine on installation day and start buckling, gapping, or letting water in within a couple of seasons.
Because vinyl is inexpensive and fast to install, it also attracts a wide range of installer skill levels, from careful crews to weekend labor. We're not saying every vinyl job is done poorly — plenty are done right. We're saying the margin for error is narrow, the failures are often invisible until they're expensive, and as a company we'd rather not build our reputation on a product where correct installation is that easy to get subtly wrong.
What's Happening Behind the Panel
This is the part homeowners usually don't see until a remodel opens the wall up. Vinyl siding is not a water barrier by itself — it's designed as the outer layer over a house wrap or building paper that's supposed to do the actual water management. When that underlying moisture barrier is old, torn, or was never installed with the right laps and flashing, water that gets behind the vinyl (and some always will, in wind-driven rain) has nowhere to drain and no way to dry out quickly, because the vinyl itself is nearly impermeable.
In a dry climate that's a minor issue. In a Whatcom County winter, with months of damp air and limited drying days, trapped moisture behind siding is exactly the setup that leads to sheathing rot, mold, and framing damage — the kind of repair that costs far more than the siding did in the first place. We've opened up enough walls on this kind of job to be cautious about recommending a material that depends so heavily on a perfect, invisible installation underneath it.
Impact Resistance and Fire Rating
Two more practical differences worth knowing before you decide:
| Factor | Vinyl Siding | James Hardie Fiber Cement |
|---|---|---|
| Impact resistance | Can crack or shatter from hail, thrown debris, or a hard bump, especially in cold weather | Dense, cement-based composite resists denting and cracking from typical impacts |
| Combustibility | A petroleum-based plastic that can melt, deform, or burn near heat sources (grills, fire pits, neighboring structures) | Non-combustible material; won't ignite or fuel a fire |
| Finish | Color is through-body but the surface can fade or chalk with UV exposure over time | Factory-baked ColorPlus finish, engineered to resist fading and chipping |
| Repairability | Discontinued colors/profiles make matching a repaired section difficult after a few years | Available in consistent, long-run product lines with stronger long-term color matching |
None of this means every vinyl-sided house is at meaningful fire risk in normal use. It means that when we're deciding what to put our name behind, non-combustible, impact-resistant material is the safer default for the lakeside, tree-adjacent lots common around Sudden Valley.
The Real Cost Math Over Time
Vinyl wins on day-one price, almost every time. But the honest comparison isn't installed cost — it's cost per year of service, factoring in what typically happens over a 20 to 30 year window:
- Vinyl often needs replacement panels or a full re-side sooner if UV fading, cracking, or moisture damage behind the wall shows up.
- Vinyl warranties are frequently prorated, meaning the payout shrinks every year — read the fine print before assuming "lifetime" means what it sounds like.
- Fiber cement carries a materially higher install cost but a longer realistic service life and a warranty structure that isn't prorated down to nothing by year 15.
- Resale and appraisal data in most markets consistently favor fiber cement and other durable claddings over vinyl, which can offset some of the up-front cost gap.
We'd rather quote you an honest, higher number once than a lower number that turns into a second siding job in fifteen years.
Why We Install Only James Hardie Instead
We standardized on James Hardie fiber cement because it addresses the specific weaknesses above without introducing new ones we're not comfortable with. It's non-combustible, it holds up to impact better than vinyl, it doesn't expand and contract nearly as much with temperature swings, and Hardie's HZ5 product line is engineered specifically for climates with sustained moisture exposure — which describes Sudden Valley and the rest of Whatcom County well. The factory-applied ColorPlus finish is baked on rather than field-painted or through-molded, which holds color and resists chipping far longer than a field-painted product, and it comes with a strong, transferable manufacturer warranty that isn't structured to quietly shrink year over year.
It's also simply a more predictable material to install correctly. Fiber cement has clear, well-documented fastening, clearance, and flashing requirements, and getting it right doesn't depend on the same degree of finesse that vinyl's expansion joints demand. That predictability is a big part of why we're comfortable standing behind every job.
Questions Worth Asking Before You Choose a Siding Material
Whatever material you end up choosing — from us or anyone else — these are the questions that actually matter:
- What is the material's real-world warranty term, and is it prorated or full-replacement?
- How is the material rated for impact and wind resistance in coastal or lakeside exposures?
- Is the material combustible, and does that matter for your lot (tree cover, fire pits, neighboring structures)?
- How forgiving is the installation process, and how experienced is the crew with that specific product?
- What moisture barrier and flashing details sit behind the siding, and who's responsible if that fails?
- How does the material perform specifically in wet, marine, or freeze-thaw climates — not just national averages?
Our Honest Recommendation for Sudden Valley Homes
If low upfront cost is your only priority and you're not planning to own the home long-term, vinyl isn't an unreasonable choice, and plenty of contractors install it well. We've simply chosen not to be one of them, because we don't think it holds up to the salt air, driving rain, and long moss season this area sees as well as fiber cement does — and we'd rather turn down a job than install something we don't believe in for the long run.
If you'd like to talk through your options — what James Hardie costs compared to what you were quoted for vinyl, what your specific exposure looks like on your lot, or just what your existing siding is telling us about how it's holding up — we're happy to take a look. Reach out for a free, no-pressure estimate using the form below.