Birch Bay Siding Cherry Point Sits in One of Whatcom County's Toughest Spots for Siding
Homes along the Cherry Point stretch north of Birch Bay face a combination that most siding products were never designed to handle for decades at a time. The open water of the Strait of Georgia sends salt-laden air and wind-driven rain straight into exterior walls, and the tree cover common on rural and waterfront lots in this part of Whatcom County keeps north and west-facing walls shaded and damp for long stretches of the year. Add a moss season that can run from early fall through late spring, and you have an environment that will find every weak point in a siding job — the joints, the fasteners, the paint film, and the places where water is supposed to drain but doesn't.
None of that means siding can't last here. It means the material and the installation both have to be chosen for this specific exposure, not for a generic Pacific Northwest install. That's the difference between a wall that still looks tight in fifteen years and one that's showing rot, staining, and failed caulk lines in five.
Why Fiber Cement Is the Right Call for This Coastline
We install James Hardie fiber cement siding exclusively, and Cherry Point is a good example of why. Fiber cement is a blend of cement, sand, and cellulose fiber pressed into engineered planks and panels — it doesn't absorb and swell with moisture the way wood does, it doesn't get brittle or discolor from UV and salt exposure the way vinyl can, and it's non-combustible, which matters on properties with wood-heat or brush nearby.
Salt Air and Metal Fatigue
Salt air is hard on fasteners and trim metal long before it's hard on the siding board itself. Correct fiber cement installation uses corrosion-resistant fastener specs and properly flashed metal details, because a rusting nail head or a corroded piece of flashing is usually the first failure point on a coastal wall — not the siding panel.
Moisture Stability Where Shade Never Lets Walls Dry
On shaded, damp walls, dimensional stability matters as much as water resistance. Fiber cement holds its shape and doesn't cup, warp, or telegraph fastener patterns the way some wood and engineered wood products can once they've cycled through repeated wet-dry seasons. James Hardie also engineers its formulations for different climate zones across the country, which is part of why we don't treat every install the same way from region to region.
A Factory Finish That Doesn't Rely on Field Paint
Hardie's ColorPlus finish is baked on at the factory under controlled conditions, which gives it better adhesion and UV resistance than a field-applied coat over primed board — a real advantage on walls that see near-constant moisture cycling and don't get much chance to fully dry between rain events.
What a Correct Fiber Cement Install Actually Involves Here
The siding itself is only part of the system. In a high-moisture, salt-exposed location like Cherry Point, the details behind and around the boards matter as much as the boards themselves.
Drainage Plane and Rainscreen Gap
A weather-resistive barrier behind the siding, installed with correct overlaps and sealed penetrations, is the backup plan for the water that gets past the cladding — and on a driving-rain coastline, some water always gets past the cladding. A furred-out rainscreen gap gives that moisture a path to drain and the wall a chance to dry, instead of trapping it against the sheathing.
Flashing at Every Horizontal Break
Butt joints, window and door heads, and any horizontal trim transition need proper flashing so water sheds outward instead of working its way behind the board. This is one of the most common shortcuts on a rushed job, and it's usually invisible until a wall has been wet behind the siding for a year or two.
Fastening and Gapping to Spec
Fiber cement has manufacturer-specified nailing patterns, fastener embedment depth, and gap tolerances at joints and trim. Overdriven nails, missed studs, or boards installed too tight against trim are common causes of cracking and premature caulk failure — problems that show up as cosmetic issues years later but trace back to install day.
Clearance from Grade, Roofs, and Hardscape
Siding installed too close to grade, a roofline, a deck, or a paved surface will wick moisture and hold it against the bottom courses longer than the rest of the wall. On properties with mature landscaping or grade that's crept up over the years, we address clearance as part of the job rather than installing over an existing problem.
Our Process on Cherry Point Homes
- On-site assessment — we look at wall orientation relative to prevailing wind and rain, existing moisture or rot at the old siding, sheathing condition, and how shade and tree cover are affecting specific elevations.
- Tear-off and sheathing inspection — old siding comes off and we inspect what's underneath before anything new goes up. Hidden rot or a compromised barrier gets addressed before we close the wall back up, not covered over.
- Weather barrier and rainscreen installation — the drainage system behind the siding is built correctly the first time, since it's the part of the job you won't see again once the siding is on.
- Fiber cement installation to manufacturer spec — correct fastening, flashing, gapping, and sealant at every joint and transition.
- Final walkthrough — we review the finished work and site cleanup with the homeowner before calling the job done.
Maintenance in Moss Season
Fiber cement is low-maintenance compared to wood, but "low-maintenance" isn't "no-maintenance" in this climate. A few habits go a long way toward protecting a siding investment on a Cherry Point property:
- Keep gutters and downspouts clear so overflow doesn't run down the face of the siding
- Trim back vegetation on shaded walls to improve airflow and sun exposure where possible
- Rinse siding periodically to remove salt residue and organic buildup before it becomes established moss or algae
- Inspect caulk lines at trim and joints yearly, and re-caulk any cracked or separated sections promptly
- Watch the lowest courses near grade and near sprinklers for staining or soft trim, which can signal a moisture path worth checking
What Affects the Cost of a Fiber Cement Job Here
| Factor | Why It Matters in Cherry Point |
|---|---|
| Tear-off and old siding removal | Rotted sheathing found during removal adds repair scope before new siding can go on |
| Home size and number of stories | More wall area and access complexity (staging, lift equipment) affect labor time |
| Trim and accessory detail | Corner boards, window trim, and fascia detail add material and installation time |
| Plank vs. panel profile | Lap siding and panel siding have different labor and material requirements |
| Factory ColorPlus vs. field-painted | Pre-finished boards reduce future repainting needs but are chosen upfront |
| Site access and delivery logistics | Rural and waterfront lots can affect staging and material delivery time |
Why a Crew That Already Works Cherry Point Matters
General siding experience isn't the same as experience with this specific stretch of coast. A crew that regularly works Birch Bay and Cherry Point knows which elevations on a typical lot here take the worst weather, understands how tree-shaded, damp sites in Whatcom County behave differently than a dry inland install, and has already worked through the logistics of getting material and equipment to rural and waterfront properties efficiently. That familiarity shows up in decisions made on-site — where extra flashing attention is worth it, where a rainscreen gap matters most, and where an older home's grade or landscaping needs to be addressed before new siding goes over it.
It also matters for accountability. A local crew is still local next year and the year after, which is worth something when you're evaluating a warranty or asking a question about how your home was detailed at the joints.
Questions Worth Asking Before You Hire
- Will you inspect the sheathing before installing new siding, not just install over what's there?
- What weather-resistive barrier and rainscreen approach do you use, and why?
- What fastener and flashing spec will you follow at joints and trim?
- Is the siding factory-finished or field-painted, and what does that mean for future maintenance?
- Can you walk me through how the job will be sequenced from tear-off to final walkthrough?
If you're weighing a siding replacement on a Cherry Point property, we're happy to take a look and talk through what your home's specific exposure calls for. Reach out for a free, no-pressure estimate — there's a form below.