Ferndale Board & Batten Siding, Done Right, for Cordata Homes
Board and batten has become one of the most requested siding profiles in Whatcom County, and Cordata is no exception. The style's tall vertical lines and crisp shadow reveals suit the mix of newer construction and updated older homes in the area, and it pairs well with the modern farmhouse and Craftsman-influenced looks that are popular on new builds near the Cordata Parkway corridor. But board and batten is also a profile that punishes a rushed or careless install. Every vertical batten creates a seam, and every seam is a place water can find its way behind the cladding if the job isn't done to spec. We install board and batten exclusively in James Hardie fiber cement, and we build every job around what actually keeps this profile watertight and stable in a marine climate like ours.
Why Cordata's Climate Is Hard on Board & Batten Siding
Cordata sits close enough to the Strait of Georgia and Bellingham Bay to catch salt-laden air, and it gets the same long, wet Pacific Northwest winters as the rest of Whatcom County. That combination is tough on any exterior cladding, but it's particularly tough on a vertical-seam profile like board and batten.
Salt Air and Driving Rain
Salt air accelerates corrosion on fasteners, flashing, and trim that aren't rated for coastal exposure. Combine that with wind-driven rain — which hits vertical board and batten seams at more of a direct angle than horizontal lap siding — and you get a profile where fastener choice and seam detailing matter far more than they would on a simpler siding style. Cheap or under-spec fasteners on a board and batten job in this area will show rust streaks and loosen years before they should.
The Long Moss Season
Whatcom County's moss season runs long — often eight or nine months out of the year in shaded, north-facing, or tree-lined lots, which describes a fair number of Cordata properties. Moss and algae hold moisture against the siding surface, and on a vertical profile with battens creating natural ledges and shadow lines, organic growth tends to collect right where water already wants to sit: along the top edge of each batten and at the base of the wall. A siding material that resists moisture absorption, plus a finish that resists staining, matters more here than it would in a drier climate.
What This Means for Material Choice
This is the core of why we only install James Hardie fiber cement for board and batten work in this area. Fiber cement doesn't absorb water and swell the way wood-based products can, and it won't rot from the inside out the way engineered wood or primed spruce battens eventually can when a seam fails. In a coastal, high-moisture climate with a long moss season, that difference compounds over the life of the siding, not just in year one.
What a Correct Board & Batten Job Actually Involves
Board and batten looks simple from the curb — vertical panels with narrow strips covering the seams — but the assembly behind that look is doing real structural and weatherproofing work. Skipping steps here is exactly how a good-looking install turns into a callback two winters later.
The Weather-Resistive Barrier and Drainage Plane
Every board and batten job starts underneath the siding, not with it. A continuous weather-resistive barrier goes over the sheathing, and in most cases we build in a drainage gap — either through furring strips or a rainscreen product — so that any water that does get past the cladding has somewhere to go instead of sitting against the wall assembly. This is not optional in a climate that sees the rainfall totals Whatcom County does.
Panel Layout and Fastening
James Hardie board and batten systems are installed as vertical panels with battens fastened over the panel joints, using a fastening pattern and fastener type specified by Hardie for our exposure category. Coastal and near-coastal installs call for corrosion-resistant fasteners — this is where cutting corners on cheap fasteners shows up years later as rust bleed and loosening battens. We follow Hardie's published fastening schedules, not a shortcut version.
Flashing and Trim Details
The details that separate a siding job that lasts twenty-plus years from one that fails early are almost always in the flashing: window and door head flashing, kickout flashing where a roofline meets a wall, Z-flashing above any horizontal trim, and proper clearance at the foundation line. On board and batten specifically, the transition points at the top and bottom of each run and around any window or door opening need careful attention, because the vertical battens create more cut edges and joints than a lap profile does.
Caulking and Sealant — Used Correctly, Not Everywhere
Board and batten gets a bad reputation in wet climates when installers rely on caulk to do the job flashing and proper laps should be doing. Caulk has a service life and it will eventually fail; a wall assembly that depends on perfect caulk forever is a wall assembly waiting to leak. We use sealant where Hardie's install specs call for it, and we build the assembly so it isn't the only thing standing between the house and the weather.
Comparing Board & Batten Siding Materials for This Climate
| Material | Moisture Behavior in Coastal Climate | Moss/Algae Resistance | Long-Term Maintenance |
|---|---|---|---|
| James Hardie Fiber Cement | Does not absorb water or swell; engineered for wet climates | Factory ColorPlus finish resists staining; surface doesn't feed rot | Periodic wash; no repainting needed for years with ColorPlus |
| Primed Spruce / Cedar Battens | Absorbs moisture at seams and cut ends; prone to swelling and cupping | Wood surface can trap and feed organic growth over time | Repainting/resealing on a recurring cycle; higher risk of rot at joints |
| Vinyl Board & Batten | Doesn't absorb water itself, but seams and panel joints can trap moisture behind the material | Can stain and hold surface grime; harder to keep crisp look | Low maintenance but can warp, crack, or fade; not repairable in sections easily |
| LP SmartSide / Engineered Wood | Better than raw wood but still wood-based; vulnerable if edge seal or caulk joints fail | Moderate; performance depends heavily on correct sealing at every cut edge | Requires diligent edge sealing and monitoring at seams over time |
Why We Standardized on James Hardie for This Profile
We don't install LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar board and batten. That's not a knock on every homeowner who has one of those on their house today — plenty of them get by fine with regular upkeep. It's that after years of doing exterior work in this climate, the products that hold their shape, keep their color, and don't come with an ongoing maintenance obligation are James Hardie's fiber cement lines. For board and batten specifically, where the profile creates more seams and cut edges than a plain lap siding job, the material's dimensional stability and moisture resistance matter even more.
James Hardie's HZ5 product line is engineered for climates with freeze-thaw cycles and heavy moisture exposure, which fits Whatcom County. The factory-applied ColorPlus finish is baked on under controlled conditions rather than field-painted, so it holds color and resists the fading and chalking that field-applied paint on wood or engineered wood siding tends to show first. And because it's non-combustible, it adds a layer of fire resistance that wood-based sidings simply can't offer — a genuine consideration given the wildfire smoke seasons the Pacific Northwest has seen in recent years.
Our Process for a Cordata Board & Batten Project
We keep the process straightforward and we don't skip the parts that don't show up in curb-appeal photos.
- On-site assessment — we look at your current siding or sheathing condition, note any rot, moisture damage, or flashing issues that need fixing before new siding goes up, and check exposure (tree cover, wind direction, roofline geometry) that affects detailing choices.
- Plan the layout and details — batten spacing, panel layout, and how we'll handle window/door transitions and roofline intersections get worked out before material orders go in.
- Weather barrier and drainage plane installation — this happens before a single piece of visible siding goes up.
- Panel and batten installation — following Hardie's fastening specifications for our exposure category, with corrosion-resistant fasteners throughout.
- Flashing, trim, and sealant work — the details that determine whether the wall assembly actually sheds water for the next few decades.
- Final walkthrough — we go over the finished job with you before calling it done.
What to Ask Before Hiring a Board & Batten Contractor in This Area
Board and batten is one of the easier siding profiles to get wrong in a subtle way — it can look complete and clean while missing the underlying details that prevent moisture problems. A few things worth asking any contractor bidding board and batten work in Cordata or elsewhere in Whatcom County:
- Do they install a weather-resistive barrier and drainage gap as standard practice, or only "if requested"?
- What fastener type do they use, and is it rated for coastal/marine exposure?
- Can they walk you through their flashing plan at windows, doors, and roof-to-wall transitions before work starts?
- Are they a James Hardie-trained or certified installer, and can they explain the difference between HZ5 and other Hardie zone products?
- Do they have experience specifically with vertical board and batten, not just lap siding?
- Will they put the fastening pattern, flashing plan, and material specifications in writing?
Why Local Experience in Cordata Matters
A crew that already works this part of Whatcom County knows what a Cordata lot's exposure typically looks like — how much tree cover is common, which directions the driving rain tends to come from, and how long moss actually takes to establish on a north-facing wall around here versus a drier inland climate. That's not something you can fully substitute with a general install manual. It shows up in small decisions: where we add extra flashing attention, how we plan drainage on a shaded elevation, and what fastener spec we default to given the salt air exposure this close to the water. Those decisions are exactly what determines whether a board and batten job still looks sharp and stays dry in year fifteen, not just in year one.
Cost Factors for a Board & Batten Project
Every home is different, but a few factors consistently move the price on a board and batten job in this area:
| Factor | Why It Affects Cost |
|---|---|
| Existing siding removal and sheathing condition | Rot or moisture damage found underneath old siding needs repair before new siding goes up |
| Home height and wall complexity | More corners, gables, and roofline intersections mean more cut battens and flashing detail work |
| Window and door count | Each opening needs its own flashing and trim detailing |
| Batten spacing and panel size chosen | Tighter batten spacing means more material and more fastening/flashing labor |
| Access and site conditions | Tree cover, tight lot lines, and multi-story sections affect scaffolding and labor time |
We give straight, itemized estimates rather than vague ballpark numbers, because the honest answer for most homes is "it depends on what we find once we're into it" — and we'd rather tell you that upfront than surprise you later.
If you're weighing board and batten for a home in Cordata or elsewhere near Ferndale, we're happy to come take a look and give you a straightforward, no-pressure estimate — just fill out the form below.