Why We Don't Install Vinyl Siding

Vinyl Siding Isn't a Bad Product — It's Just Not the Right One for Here

Vinyl siding is the most-installed siding material in the country, and there's a reason for that: it's inexpensive, it goes up fast, and for a lot of climates it does an adequate job for a couple of decades. If you're comparing sticker prices alone, vinyl will almost always look like the smart choice. We're not going to tell you vinyl siding is garbage, because it isn't. We're going to tell you why, after years of doing exterior work throughout Whatcom County, we made the decision to stop installing it and put James Hardie fiber cement on every home we side instead.

This isn't a marketing angle. It's a standard we hold ourselves to because we're the ones who get the callback ten or fifteen years later when a product didn't hold up the way a homeowner expected. In Whatcom County — with salt air rolling in off Bellingham Bay and the Strait of Georgia, driving rain that comes sideways more often than straight down, and a moss season that can run eight or nine months out of the year — some of vinyl's known weak points become everyday problems rather than rare edge cases.

What Vinyl Siding Actually Gets Right

Before we get into why we don't install it, it's worth being straight about where vinyl earns its popularity:

• Low upfront material cost — typically the cheapest siding option per square foot.
• Fast installation — panels snap together and go up quickly, which keeps labor costs down.
• Low maintenance in mild, dry climates — it doesn't need repainting.
• Wide color and profile selection from most manufacturers.

In a hot, dry climate with minimal wind-driven rain, vinyl can be a perfectly reasonable choice. Whatcom County isn't that climate, and that's the whole reason this page exists.

The Moisture Problem: Vinyl Isn't a Water Barrier, It's a Screen

This is the part most homeowners don't hear from the person selling them vinyl siding. Vinyl panels are designed to overlap loosely and are installed with expansion gaps and nail slots that let the material move with temperature changes. That means vinyl siding is not a sealed water barrier — it's engineered to let some water get behind it, on the assumption that a correctly installed weather-resistant barrier (housewrap) and drainage plane behind the panels will manage that moisture and let it drain and dry out.

In a lot of the country, that system works fine most of the year. In Whatcom County, where driving rain off the water can push moisture sideways into wall assemblies for days at a stretch during fall and winter storms, that drainage plane is doing far more work, far more often. If the housewrap, flashing, or seams behind the vinyl aren't detailed perfectly — and on a lot of older or lower-bid installs, they aren't — moisture finds its way into sheathing and framing where it can sit for weeks without anyone seeing it, because the vinyl itself hides the problem from view.

Fiber cement doesn't eliminate the need for a correctly installed weather barrier — no siding does — but it isn't relying on loose overlapping panels as its first line of defense the same way vinyl is, and it doesn't warp or bow if moisture and temperature swings stress the material over time.

Moss, Algae, and the Whatcom County Growing Season

Anyone who's owned a home here for more than a winter knows the drill: north-facing walls, shaded eaves, and anything near mature trees start showing green and black growth almost year-round. Vinyl siding's textured surface and the small gaps at its overlaps give moss spores and algae plenty to grab onto, and because vinyl can't be pressure-washed as aggressively as harder materials without risking cracked panels or water intrusion behind seams, cleaning it safely is more limited than most homeowners expect.

James Hardie's factory-applied ColorPlus finish is baked on under controlled conditions and holds up to routine washing far better, which matters in a place where you're realistically dealing with moss and mildew for the better part of the year, not just a rainy season.

Freeze-Thaw and Temperature Swings

Whatcom County doesn't get brutal winters, but we do get enough freeze-thaw cycling, especially at elevation and in the valleys, to stress any siding material that expands and contracts a lot with temperature. Vinyl has a high thermal expansion rate — panels are engineered with slack for exactly this reason — and in cold snaps, standard vinyl can become brittle and prone to cracking on impact from hail, a dropped ladder, or a stray baseball. Once a panel cracks, water has a direct path behind the cladding.

Installation Sensitivity: Vinyl Hides Bad Work, Fiber Cement Doesn't Forgive It

This is the trade-off we care about most as installers. Vinyl siding is genuinely easy to install badly and have it look fine on day one. Nail it too tight and you've removed the expansion allowance the manufacturer requires — the panels can buckle or crack with the first real temperature swing. Skip proper flashing at windows, doors, and penetrations and there's no visible sign of it until moisture damage shows up on the inside, sometimes years later. Because vinyl is a low-cost, high-volume product, a lot of installers who came up doing production work treat it as a five-minute-a-panel job, and the market has trained homeowners to expect rock-bottom labor pricing for it.

Fiber cement is a different animal to install. It's heavier, it has to be cut and fastened to precise manufacturer specs, joints need to be properly flashed and sealed, and it demands more skill and more time per square foot. That's part of why it costs more — but it also means the installers who work with it are held to a higher standard, and mistakes are more likely to be caught before they become someone's water damage claim five years down the road.

Cost Over Time: The Real Comparison

Sticker price isn't the whole story. Here's how the two materials tend to compare over a realistic ownership timeline in our climate:

Factor	Vinyl Siding	James Hardie Fiber Cement
Upfront material + install cost	Lower	Higher
Expected lifespan (well-maintained)	15–25 years typical	30–50+ years with proper install
Moisture resistance behind cladding	Relies heavily on correct housewrap/flashing	Same requirement, but material itself is more dimensionally stable
Impact resistance (hail, debris)	Can crack, especially in cold	Significantly more impact-resistant
Fire resistance	Combustible, can melt/deform near heat	Non-combustible
Fading / finish life	Color molded in, can fade or chalk over time	ColorPlus factory finish, longer color retention
Resale / appraisal perception	Viewed as standard/economy	Often viewed as an upgrade
Warranty structure	Varies widely by manufacturer, often prorated	Strong transferable warranty from Hardie

When you spread the higher upfront cost of fiber cement over a lifespan that's often double what vinyl delivers before it needs replacement, the annualized cost gap narrows a lot more than the initial quote suggests — and that's before factoring in repair costs if moisture gets behind vinyl undetected.

Why We Standardized on James Hardie

We made the call to install James Hardie exclusively rather than carry both vinyl and fiber cement as options. A few reasons drove that:

• Non-combustible material — meaningful peace of mind, especially with wildfire smoke and dry-season risk becoming a bigger part of Pacific Northwest summers.
• Climate-engineered product lines — Hardie's HZ10 formulation is specifically engineered for the wetter, milder climate zones like ours, rather than a one-size-fits-all national product.
• Factory-applied ColorPlus finish — better fade and moisture resistance than field-applied paint, and it holds up to the washing this climate demands.
• Dimensional stability — it doesn't expand, contract, warp, or sag the way vinyl can over a full range of Whatcom County seasons.
• One material, one crew standard — our installers get deep, repeated experience with a single system's flashing, fastening, and joint details instead of splitting attention across product lines with very different installation rules.

We'll be honest: this also means we're not the right contractor for every homeowner. If your priority is the absolute lowest upfront cost and you're comfortable with vinyl's trade-offs, there are contractors in the area who do that work well. We chose to specialize instead of trying to be everything to everyone, because we'd rather stand fully behind one system than half-stand behind two.

What to Weigh Before You Decide

If you're currently comparing siding options, a few honest questions worth asking yourself:

1. How long do you plan to own this home? A shorter timeline changes the math on upfront cost versus lifespan.
2. Is your home exposed to wind-driven rain — west or south-facing walls, open lots near the water or on a hill?
3. Do you already fight moss or algae on your current siding, roof, or fences?
4. Is fire resistance a meaningful factor for your insurance or peace of mind?
5. Are you planning to sell within the next 10-15 years, and how might siding material affect buyer perception or appraisal?

A quick checklist if you're evaluating any contractor's siding proposal, vinyl or otherwise:

• Ask exactly what housewrap and flashing details they use behind the siding — not just the visible product.
• Ask how they handle window and door flashing integration specifically.
• Ask what the manufacturer's warranty actually covers, and whether it's prorated.
• Ask how many years the crew doing the install has worked with that specific material.
• Get the maintenance expectations in writing — cleaning frequency, repainting needs, and moss treatment.

The Bottom Line for Whatcom County Homes

Vinyl siding works fine in a lot of places. Whatcom County's combination of salt-laden coastal air, sustained wind-driven rain, and a moss season that barely takes a break puts extra strain on exactly the parts of vinyl's design that are most sensitive to climate — its reliance on a perfectly executed drainage system behind loose-fitting panels, its tendency to become brittle in cold snaps, and its limited tolerance for aggressive cleaning against organic growth. We'd rather install a material engineered for this specific climate and back it with a workmanship standard we're proud of, than install the cheaper option and hope the install was perfect enough to make up the difference.

If you're weighing siding options for your home, we're happy to walk through what we see on your specific house — sun exposure, wind direction, existing moisture or moss issues — and give you a straight answer, not a sales pitch. Reach out for a free, no-pressure estimate using the form below.