Blaine Siding Cherry Point's Exterior Problem
Cherry Point sits along the Strait of Georgia shoreline a few miles south of Blaine, in a stretch of Whatcom County where houses face the water more or less head-on. That position means a steady flow of salt-laden marine air moving across siding, trim, and fasteners almost year-round, along with the kind of driving rain that comes in sideways during winter storm systems rather than falling straight down. It's a harder exterior environment than most inland Whatcom County neighborhoods deal with, and it shows up in how fast a house's exterior finish starts to fail if the materials and installation weren't built for it.
Add to that a moss season that runs long here — mild temperatures and near-constant dampness mean north-facing walls and anything under tree cover rarely get a real chance to dry out between storms. Surface porosity on any siding material becomes an invitation for moss, algae, and mildew to take hold, and once established, it's a maintenance problem that doesn't go away on its own. Homes at Cherry Point are working against all three of these conditions at once: salt exposure, wind-driven moisture intrusion, and a growing season for moss that's longer than almost anywhere inland.
Why We Only Install James Hardie Fiber Cement Here
We install James Hardie fiber cement siding exclusively. We don't install LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar, and that's a standard we hold everywhere we work, including Cherry Point. Fiber cement's core doesn't absorb salt-laden moisture into a wood-fiber structure the way engineered wood products can, it won't warp or cup after repeated wet-dry cycling the way some alternatives do, and it's non-combustible, which matters on a shoreline where a lot of homes sit close to dry brush and open lots. Hardie's HZ5 product line is engineered specifically for climates like ours — sustained moisture and moderate freeze-thaw cycling — rather than being a general-purpose board adapted after the fact.
That doesn't mean every siding failure we've seen on Cherry Point tear-offs was a bad product choice from the start. Plenty of it was a fine product installed without the moisture-management details this coastline actually requires. Which is the bigger point: the product matters, but installation quality is what decides whether that product actually performs here for the next few decades.
Comparing What Cherry Point Homes Are Up Against
| Condition | What It Does to Siding | What the Install Needs to Handle |
|---|---|---|
| Salt-laden marine air | Accelerates corrosion on fasteners and exposed metal, degrades lower-grade finishes faster | Corrosion-resistant fasteners and flashing, a factory-cured finish rather than field paint |
| Wind-driven rain off the water | Pushes moisture sideways into joints, laps, and penetrations rather than straight down | Proper lap overlap, sealed trim transitions, correctly flashed penetrations |
| Long moss/mildew season | Growth takes hold fastest on surfaces that stay damp longest, especially shaded walls | Drainage gap behind the siding, ground clearance, gutter and roof-wall detailing that keeps water moving away from the wall |
What Correct Installation Requires on This Coastline
Rain Screen and Drainage
A proper Hardie installation on a Cherry Point home includes a drainage gap — a rain screen — between the back of the siding and the house wrap. That gap lets any moisture that does get past the siding surface drain downward and evaporate instead of sitting against the sheathing. On a wind-exposed shoreline lot, skipping this detail is one of the more common reasons we find soft sheathing behind siding that otherwise looks fine from the street.
Flashing, Fasteners, and Trim
Every horizontal lap, window and door opening, and trim transition needs to shed water down and out, not just look sealed from the ground. That means flashing installed in the correct sequence — never taped over top of a seam in a way that traps water behind it — corrosion-resistant fasteners driven at Hardie's specified spacing, and cut edges of the board sealed in the field, since factory finish doesn't extend to a fresh cut made on site. None of this is exotic work. It's the manufacturer's own installation spec, applied consistently on the parts of the job that are hardest to check once the siding is up and the crew has moved on.
The ColorPlus Finish and Cherry Point's Moss Season
Most Hardie siding we install uses the factory-applied ColorPlus finish rather than field-applied paint. It's baked on under controlled conditions before the board ever reaches the site, which gives it a real advantage over paint applied outdoors in a marine climate where wind, salt, and unpredictable weather all work against an even, durable coat. That finish holds color and resists chalking longer than typical field paint, which matters on a shoreline where sun, salt, and moisture are all working on the surface at once.
What ColorPlus doesn't do is stop moss from growing on a wall that never dries out. That's a detailing and maintenance issue, not a finish issue — gutters that keep water off the wall face, ground clearance at the base of the siding, and roof-wall intersections that route water away rather than dumping it down the siding all matter as much as the product itself. A good finish on a poorly detailed wall still grows moss; a correctly detailed wall stays cleaner far longer, regardless of finish.
Our Process for a Cherry Point Job
We start with a walk of the property and, where the existing siding allows it, a look at what's happening underneath before we ever price the job. On a shoreline lot, that matters more than it does further inland — we want to know if moisture has already gotten behind the existing siding before we commit to a scope, not discover it mid-tear-off.
We tear off existing siding rather than installing over it. Covering old siding traps whatever moisture is already in the wall assembly behind a new layer, which defeats the purpose of a fresh install on a house that's already been absorbing salt air and driving rain for years. A full tear-off lets us see and address any sheathing damage before new house wrap, flashing, and siding go on — and it's the only way to actually verify the wall is being built correctly from the studs out, not just re-skinned.
From there, installation follows Hardie's spec on fastening, flashing, and drainage, followed by a final walk-through before we call the job done. We're not the fastest crew in the county, and on a Cherry Point house we'd rather take the extra time on flashing and drainage details than hand back a job that looks finished from the curb but fails in three winters.
Why a Crew That Already Works Cherry Point Matters
Cherry Point isn't a uniform stretch of coastline — a lot on open water frontage takes a different wind and salt load than one set back and shaded by trees a quarter mile inland, even within the same small area. A crew that's already worked this stretch of Whatcom County knows which walls on which orientations tend to stay wet longest, where extra flashing attention actually earns its keep, and which details are worth the added time versus which are genuinely optional on a more sheltered lot. That's the kind of judgment that only comes from doing the work here repeatedly, not from a general knowledge of coastal construction.
There's also a plain practical reason it matters: warranty work and follow-up. A crew that's local to the Blaine area and regularly working Cherry Point is easy to reach if a question comes up two years after the install, rather than a contractor who did one job in the area and moved on.
Maintenance to Expect in This Climate
Even a correctly installed Hardie system benefits from a small amount of routine upkeep on a shoreline property. None of it is heavy work, but skipping it lets small problems turn into bigger ones faster here than in a milder climate.
- Rinse siding periodically with a garden hose or soft wash to clear salt film and organic buildup before it sets in, especially on walls that face the water directly
- Keep gutters and downspouts clear so overflow doesn't run down the wall face and feed moss growth on siding below the roofline
- Trim back vegetation that shades a wall or blocks airflow, since shaded, still air is exactly what lets moss and mildew establish
- Check caulking at trim joints and penetrations once a year — sealant is the first thing to wear out in constant salt air and sun, well before the siding itself
- Maintain ground clearance at the base of the siding; soil, mulch, or debris piled against the bottom course holds moisture against the board
Cost Factors for a Cherry Point Hardie Project
| Factor | Why It Moves the Price |
|---|---|
| Home size and wall area | More square footage means more material and labor, the most basic driver of overall cost |
| Tear-off complexity | Multiple layers of old siding, or older materials that require careful removal, add time beyond a simple single-layer tear-off |
| Trim and architectural detail | Corners, dormers, multiple gables, and window surrounds all add labor time relative to a simple rectangular wall |
| Moisture damage found underneath | Rotted or soft sheathing discovered during tear-off needs repair before new siding goes on, which isn't always visible until the old material is off |
| Site access | Waterfront lots, steep grading, or tight setbacks can slow staging and material handling compared to a flat, open lot |
These are general drivers, not a quote — every Cherry Point property sits a little differently relative to the water, tree cover, and prior construction, and we won't put a real number on a job until we've walked it and, where possible, looked at what's happening behind the existing siding.
Get a Free, No-Pressure Estimate
If your Cherry Point home needs new siding, or you're not sure whether what's on the walls now is holding up the way it should against the salt air and rain off the water, we're glad to take a look. Use the form below to schedule a free, no-pressure estimate — we'll walk the property, tell you honestly what we see, and explain what a correct install would involve for your specific house.