Custer Cherry Point's Exterior Walls Work Harder Than Most
Cherry Point sits right on the water in Whatcom County, close enough to the Strait of Georgia that salt-laden air is a daily fact of life, not an occasional weather event. Add in the marine layer, the wind that comes off the water with nothing to slow it down, and the long gray stretch from fall through spring when moss and algae get a running start on any surface that stays damp, and you have one of the tougher exterior environments in this part of Washington. Siding here isn't just cladding — it's the first line of defense against a climate that never really lets a wall dry out completely for months at a time.
We install James Hardie fiber cement siding exclusively, and Cherry Point is a good example of why. This page covers what a fiber cement job actually needs to do in this specific area, how we approach it, and what separates a correct installation from one that looks fine for a year or two and then starts showing problems.
What Salt Air and Driving Rain Actually Do to Siding
It helps to be specific about the failure modes instead of speaking in generalities, because the mechanisms matter for choosing a product and an installation method.
Salt Air
Airborne salt is corrosive to metal fasteners, flashing, and trim, and it accelerates the breakdown of paint films and coatings that aren't formulated to resist it. Over years, unprotected or poorly coated siding near the water tends to chalk, fade unevenly, and lose adhesion faster than the same product would inland. Fasteners that aren't corrosion-resistant can streak rust down the face of a wall long before the siding itself is due for attention.
Driving Rain
Wind-driven rain off the water doesn't fall straight down — it hits walls at an angle, drives under laps and around trim, and finds any gap in flashing or caulking. A siding system that relies on face-sealing (caulk and paint doing the work of keeping water out) tends to fail here faster than a system built around proper water-shedding laps, correct flashing, and a drainage plane behind the cladding.
Moss and Algae
Whatcom County's long wet season means north-facing walls, shaded elevations, and anything near overhanging trees stay damp for extended stretches. Organic growth needs moisture and time, and Cherry Point supplies both. Siding that holds moisture at the surface — or that has seams and gaps where debris and moisture collect — gives moss a foothold that plain cleaning won't permanently solve.
Why We Only Install James Hardie Here
Fiber cement as a category handles this environment better than wood, vinyl, or engineered wood siding, because it's non-combustible, dimensionally stable, and doesn't absorb and swell with moisture the way wood-based products do. But not all fiber cement is installed or finished the same way, and that's where our standard comes in.
We install Hardie's HZ5 product line, which is engineered specifically for the kind of high-moisture, high-humidity climate Cherry Point sits in. It's factory-primed and rated for freeze-thaw and moisture cycling conditions that are more aggressive than what you'd design for on the dry side of the state. Combined with Hardie's ColorPlus factory finish — a baked-on coating applied under controlled conditions rather than field-painted — the color and surface hold up to UV and salt exposure far better than a job-site paint job typically does, and touch-up product is available that's color-matched to the specific finish.
The other reason we standardized on Hardie is the warranty structure: it's a real, transferable, manufacturer-backed warranty on the product itself, separate from our own installation warranty. In a corrosive coastal environment, that distinction matters — a product that fails prematurely due to the climate is a different problem than one that fails due to bad installation, and homeowners deserve coverage for both.
What a Correct Fiber Cement Job Looks Like in This Environment
The siding panel itself is only part of the system. In a location like Cherry Point, the installation details below are what actually determine whether the wall stays dry for the next 30-plus years.
- Corrosion-resistant fasteners rated for the exposure — not standard galvanized nails that will eventually streak or fail near salt air
- A properly installed water-resistive barrier and drainage plane behind the siding, so any water that does get past the cladding has somewhere to go
- Correct flashing at every horizontal transition — window heads, deck ledgers, roof-to-wall intersections — installed to shed water outward, not rely on caulk
- Proper lap exposure and fastening per Hardie's published installation instructions, which affects both water-shedding and the manufacturer warranty's validity
- Rainscreen or furring strips where conditions call for it, to keep the back of the siding ventilated and reduce moisture retention
- Caulking used as a secondary defense at penetrations and trim joints, not as the primary water barrier
- Careful attention to ground clearance and any area shaded by trees or structures, where moss and algae pressure is highest
Skipping any one of these doesn't usually show up right away. It shows up in year three or four as a soft spot near a window, streaking below a fastener line, or moss creeping in at a lap joint that wasn't sealed correctly — and by then it's a repair, not a maintenance item.
Our Process for a Cherry Point Job
1. On-Site Assessment
We walk the exterior and look specifically at exposure — which elevations take the worst of the wind and rain, where moisture and moss are already a problem, and where existing flashing, trim, or sheathing may need attention before new siding goes on.
2. Tear-Off and Substrate Check
Once old siding comes off, we check the sheathing and water-resistive barrier underneath. This is the point where hidden moisture damage from a previous face-sealed system often turns up, and it needs to be addressed before anything new gets installed — covering a wet or damaged substrate with new siding just hides the problem.
3. Weather Barrier and Flashing
We install or verify the water-resistive barrier, then flash every window, door, and horizontal transition before a single piece of siding goes up. This step is where most long-term water problems are prevented or created.
4. Hardie Installation to Spec
Panels and trim go on following Hardie's published fastening and clearance requirements, with corrosion-resistant fasteners throughout. We don't shortcut lap exposure or fastener spacing to save time — those numbers are there for a reason, especially in a wind-driven-rain environment.
5. Final Detailing and Walkthrough
Trim, caulking at penetrations, and touch-up are finished last, and we walk the job with the homeowner before calling it done.
Comparing Siding Options for a Coastal Whatcom County Home
| Factor | Vinyl | Wood / Cedar | James Hardie Fiber Cement |
|---|---|---|---|
| Salt air resistance | Fair; can chalk and become brittle over time | Poor without diligent maintenance | Strong; factory finish engineered for this exposure |
| Moisture / moss resistance | Doesn't rot, but seams and warping can trap moisture | Absorbs moisture; prone to rot and moss without upkeep | Dimensionally stable; doesn't swell or absorb like wood |
| Wind-driven rain performance | Depends heavily on installation; can be blown loose in high wind | Depends on paint/sealant upkeep | Rigid panel system with proper lap and flashing detailing |
| Finish longevity | Color molded in but can fade; can't easily repaint | Needs repainting or restaining every few years | ColorPlus factory finish holds color for years with minimal upkeep |
| Fire resistance | Melts/deforms under heat | Combustible | Non-combustible |
Every product on that table has a place somewhere. Our position is simply that for a coastal Whatcom County exposure like Cherry Point, fiber cement installed correctly is the option that holds up with the least ongoing maintenance and the least risk of moisture-related failure.
Maintenance in a Salt Air, High-Moss Environment
Fiber cement lowers the maintenance burden compared to wood, but "low maintenance" isn't "no maintenance," especially this close to the water. A short annual routine goes a long way:
- Rinse the exterior once or twice a year, focusing on shaded and north-facing walls where moss and algae take hold first
- Check caulking at window and door trim annually and re-caulk any joints that have cracked or pulled away
- Keep gutters clear so water isn't overflowing down the face of the siding
- Trim back vegetation that keeps a wall section shaded and damp longer than the rest of the house
- Watch fastener heads and trim edges for early rust staining, which usually means a fastener issue rather than a siding issue, and is easier to fix early
Why Hiring a Crew That Already Works This Area Matters
Installation quality is what determines whether fiber cement performs the way it's designed to, and that's especially true in a marine, high-wind, high-moisture location like Cherry Point. A crew that hasn't worked this specific kind of exposure before may follow generic installation practices that would be fine in a drier part of the state but leave gaps here — under-flashed penetrations, standard fasteners instead of corrosion-resistant ones, or lap details that don't account for wind-driven rain.
We work throughout Custer and the surrounding Whatcom County coastline, so the flashing details, fastener choices, and drainage planning we use on a Cherry Point home reflect what this specific stretch of coast actually requires — not a one-size-fits-all approach copied from inland jobs.
Signs Your Current Siding Is Losing the Fight
Homeowners in this area often wait too long to address early warning signs because from the street the house still looks fine. Worth checking for:
- Persistent moss or algae growth that returns quickly after cleaning
- Soft spots or visible warping, especially around windows and at the base of walls
- Paint that's peeling, bubbling, or chalking heavily on the sides that face the water
- Rust streaking below fastener lines or trim
- Visible gaps opening up at seams, corners, or trim joints
Any of these can mean moisture has already gotten behind the cladding, which is worth having looked at before deciding whether repair or full replacement makes sense.
If you're weighing your options for a home in or near Cherry Point, we're happy to take a look and give you a straightforward, no-pressure assessment of what your siding needs and what a correct James Hardie installation would involve. There's a form below to get started.