Birch Bay Siding Board & Batten Siding for Custer Homes
Custer sits inland just enough from Birch Bay and Semiahmoo Bay that people sometimes assume it's sheltered from the coastal weather that shapes siding decisions closer to the water. It isn't, not really. Salt-laden air off the Salish Sea reaches Custer properties on a normal windy day, the rain that blows through Whatcom County rarely falls straight down, and the tree cover and mild, damp air that define this part of the county keep moss and mildew active across most of the calendar. Board and batten siding — vertical boards with a narrow strip covering each seam — has become a popular choice for homes in and around Custer because of how it looks against the area's mix of newer builds and older farmhouses. What that popularity doesn't always come with is an understanding of how much the profile itself depends on correct installation to hold up here.
We install James Hardie fiber cement board and batten exclusively, and every seam, fastener, and flashing detail on a Custer job is built around what this specific stretch of Whatcom County does to an exterior wall over the long run, not around a generic national install guide.
What Custer's Climate Puts a Board & Batten Wall Through
Salt Air Off Birch Bay and the Bay
Custer's proximity to Birch Bay and the broader Salish Sea means salt exposure isn't limited to homes with a water view. It settles on siding, trim, and exposed fasteners across the wider area, and over years it accelerates corrosion on hardware and speeds the breakdown of finishes that weren't built with that exposure in mind. Board and batten uses more fasteners per square foot than standard lap siding, since both the boards and the battens covering their seams need to be secured, so getting the fastener spec right carries more weight on this profile than on most others.
Wind-Driven Rain Through Vertical Seams
Rain in this part of Whatcom County tends to come in sideways, pushed by wind off the water rather than falling straight down. A vertical profile like board and batten runs seams the full height of the wall, which gives wind-driven rain a lot of joint length to work against if those seams aren't detailed correctly. A batten that's caulked tight instead of properly lapped with clearance becomes a place where water gets pulled in rather than shed.
A Long Moss and Mildew Season
Mild temperatures and steady moisture keep moss and mildew active on shaded and tree-lined walls in Custer for most of the year, not just a few wet months. A batten set tight against a board with no room for air movement behind it traps that dampness right where it can't dry, which is the slow start of staining, softened substrate, and paint failure right along the seam.
Why Material Choice Matters More on This Profile
Board and batten magnifies whatever weaknesses a siding material already has, simply because it has more seams and more exposed edge per square foot than a standard lap profile. That's a meaningful part of why we don't offer LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar board and batten. Those are legitimate products, and other contractors install them competently, but on a profile with this much joint length, in a climate that stays wet and salt-exposed most of the year, we standardized on one system we trust completely rather than offering a cheaper option that shifts the maintenance burden onto the homeowner down the road.
| Material | Behavior at Batten Seams | Maintenance in This Climate | Realistic Lifespan |
|---|---|---|---|
| James Hardie fiber cement | Dimensionally stable; doesn't swell, cup, or shift at the joint | Low; factory finish resists moss and salt-driven fading | 30+ years with correct install |
| LP SmartSide (engineered wood) | More sensitive to moisture at cut edges and fastener holes | Moderate; edge sealing needs ongoing upkeep | 15-25 years, climate-dependent |
| Vinyl | Can gap or distort at battens with temperature swings; seams less rigid | Low visible upkeep, but hidden moisture issues are hard to spot | 20-30 years, variable |
| Cedar | Absorbs moisture at every seam without a consistent sealing schedule | High; recurring painting or staining required | 15-25 years with consistent upkeep |
Fiber cement's core doesn't expand and contract with moisture the way wood-based products do, which matters most on a profile built entirely from vertical seams. James Hardie's factory-applied ColorPlus finish also means the only field-painting we do is priming a cut edge here and there — not depending on a site-applied coat to hold up across every board face for the next decade.
What a Correct Board & Batten Install Actually Involves
Board and batten looks simple from the curb — vertical boards, battens over the seams — but a correct install has a lot going on behind that surface, and skipping any one piece tends not to show up for a year or two:
- Weather-resistive barrier installed and lapped correctly across the wall before any siding goes up
- A drainage gap or rainscreen behind the siding so moisture that gets past the surface can dry instead of sitting against the sheathing
- Corrosion-resistant fasteners at the spacing James Hardie's install spec calls for, sized correctly for the board thickness
- Battens set with the clearance the manufacturer specifies, not caulked flush, so the wall can shed water instead of holding it against the seam
- Flashing properly lapped at windows, doors, corners, and the base of the wall, where the vertical run meets a horizontal surface
- Field-cut edges primed before installation to protect the factory ColorPlus finish everywhere the boards were trimmed on site
None of these show up as a problem on install day. What shows up years later — staining along the battens, soft spots near the base, paint failure right at the seam — is almost always traceable back to one of these steps being rushed or skipped, which is exactly why it's easy for a corner-cutting install to look fine at the walkthrough and cause trouble well after the crew is gone.
Our Process for a Custer Board & Batten Project
Walkthrough and Assessment
We start by looking at the specific walls involved on your property — which ones take the weather head-on, which are shaded and slower to dry, and whether the existing wall assembly already has moisture issues that need addressing before new siding goes up. New board and batten over a wall with hidden rot just buries the same problem under fresh material.
Planning the Details Before Install Day
Batten spacing, corner treatment, and how the siding meets windows, trim, and rooflines get worked out before crews start cutting material. On a profile with this many seams, deciding those details on paper first avoids the kind of field improvisation that's usually where corners get cut.
Installation to Manufacturer Spec
Every fastener, gap, and flashing lap follows James Hardie's published installation requirements for this climate zone. That's what keeps the manufacturer's warranty intact, and it's the actual reason the wall performs the way it's supposed to for decades instead of years.
Final Walkthrough
We walk the finished job with you, cover the little maintenance board and batten actually needs in this climate, and make sure you know what a healthy seam looks like if you ever want to check the wall yourself down the road.
Why Hiring a Crew That Already Works Custer Matters
Board and batten rewards local experience in a way a lot of other siding profiles don't, because the failure points are subtle and slow to surface. A crew that's installed this profile across Custer and the surrounding Birch Bay area through several wet seasons already knows which wall orientations need extra attention because of shade and tree cover, how much batten clearance actually earns its keep in air this consistently damp versus what a generic spec sheet suggests, and where a drainage gap matters most given how this specific area's wind and rain actually behave. That's judgment that doesn't show up in a brochure, and it's the difference between a board and batten wall that still looks and performs the same in fifteen years and one that's already showing seam staining by year five.
Cost Factors for Board & Batten in This Area
Board and batten typically runs more per square foot than standard lap siding, largely because of the added batten material and the extra labor of fastening and detailing two layers instead of one. Beyond the base material and labor, a handful of factors move the price on a given Custer home:
| Factor | Why It Matters |
|---|---|
| Wall height and complexity | More corners, dormers, and transitions mean more cuts and flashing details |
| Existing wall condition | Rot or moisture damage found during tear-off needs repair before new siding goes up |
| Batten spacing and reveal | Tighter spacing uses more material and more fastening labor |
| Trim and window detailing | More openings mean more flashing and finish work around each one |
| Site access | Rural lots and longer driveways common around Custer can add setup and material handling time |
We'll walk your specific home and give you real numbers rather than a rough per-square-foot estimate — two houses with similar square footage can land at very different board and batten costs depending on how many of these factors actually apply.
Getting It Right the First Time
Board and batten isn't forgiving to redo. Because the battens cover the seams between boards, fixing a bad install usually means pulling battens, boards, or both, rather than a quick patch. That's why we treat the planning and detailing phase of a Custer board and batten project as seriously as the install itself — it's a lot cheaper to get it right the first time than to tear out a wall that was installed wrong and start over.
If you're weighing board and batten for a home in Custer or anywhere else around Birch Bay, we're glad to walk the property, talk through what your specific walls need given their exposure and orientation, and give you a straightforward, no-pressure estimate. There's a form below — reach out and we'll set up a time to take a look.