Ferndale Board & Batten Siding Built for an Island, Not Just a Coastline
Board and batten reads as clean, vertical, and a little more modern than standard lap siding, which is a big part of why it shows up so often on newer builds and remodels around Whatcom County. On Lummi Island, that same profile has to do more work than it does on a typical mainland lot. An island home doesn't just face weather from one direction the way a shoreline property might — it can take salt air, wind, and driving rain from multiple sides depending on where the house sits relative to the water, and there's rarely a windbreak of other buildings or dense development to soften any of it. Add in a moss season that runs long across this whole region, and a vertical siding profile built on seams and joints needs to be detailed with real intent, not just installed to look right on day one.
We install James Hardie fiber cement board and batten exclusively on Lummi Island and across our Whatcom County service area. We don't install LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar board and batten. That standard, and the way we plan and stage a job to actually get materials and crews onto the island, is what this page walks through.
What Island Exposure Does to a Vertical Wall
Salt Air From More Than One Direction
Homes on the mainland shoreline usually take their heaviest salt exposure from one prevailing direction. On an island, that's often less true — depending on siting and elevation, a house can pick up salt-laden air moving across open water from more than one side over the course of a year. Board and batten has more exposed fasteners and edge seams per square foot than lap siding, so a material or hardware choice that's marginal on salt resistance shows its weaknesses faster here than it would on a more sheltered inland wall.
Wind-Driven Rain Against Batten Seams
Open water on multiple sides means rain rarely arrives straight down. It gets pushed sideways into every vertical seam a board and batten wall has to offer, and there are a lot of them — every board edge, covered by a batten, is a joint the wind is testing. A batten that's caulked tight instead of properly lapped with the clearance the manufacturer calls for turns into a spot where wind-driven water gets pushed in rather than shed.
A Long Moss Season on Textured, Vertical Boards
Mild temperatures and near-constant moisture give moss and mildew a long growing season across this part of Washington, and shaded or north-facing walls on tree-covered island lots hold that dampness even longer than open, sun-exposed ones. A batten seated tight against a board with no room to ventilate becomes a trap for that moisture — the seam stays damp, and staining, substrate softening, and premature finish failure follow, usually starting exactly where you can't see it from the ground.
Why We Install James Hardie Board & Batten Only
Board and batten multiplies whatever weaknesses a siding material already has, because there's more seam length and edge exposure per square foot than most other profiles. On a site this exposed and this dependent on a job being done right the first time, we'd rather commit to one system we trust fully than offer a cheaper option and hope the trade-offs don't catch up with the homeowner a few winters later.
| Material | Behavior at Vertical Seams | Salt/Moisture Resistance | Realistic Lifespan Here |
|---|---|---|---|
| James Hardie fiber cement | Dimensionally stable; doesn't swell or cup at the batten joint | High, especially in HZ5 formulation | 30+ years with correct install |
| LP SmartSide (engineered wood) | Cut edges and fastener holes are moisture-sensitive | Moderate; edge sealing needs ongoing upkeep | 15-25 years, climate-dependent |
| Vinyl vertical panel | Seams less rigid; can gap or warp with temperature swings | Low to moderate; hidden moisture is hard to spot | 20-30 years, variable |
| Cedar board and batten | Absorbs moisture at every seam without regular resealing | Low without disciplined maintenance | 15-25 years with consistent upkeep |
James Hardie's HZ5 fiber cement is engineered for exactly this kind of heavy-moisture, freeze-thaw-adjacent exposure, and its factory-applied ColorPlus finish means the color and protective coating were cured under controlled conditions rather than brushed on in the field. Fiber cement also doesn't expand and contract with moisture the way wood-based products do, which matters most on a profile that's essentially built out of vertical joints. It's also non-combustible, which is worth real weight on an island where fire response depends on reaching the property by road and, ultimately, by ferry — that's not a reason to panic about fire risk, but it is a reason non-combustible siding earns its keep here more than it might somewhere with a fire station five minutes away.
What a Correct Board & Batten Installation Involves
Drainage Gap Behind the Siding
A rainscreen or drainage gap behind the boards gives any moisture that does work its way past the surface somewhere to go besides sitting against the wall sheathing. On a wall built entirely from vertical seams, in a climate this wet, that gap is not optional — it's the difference between a wall that dries out between storms and one that stays damp long enough for problems to start underneath the surface.
Fastening and Batten Clearance
Boards and battens both need corrosion-resistant fasteners at the spacing James Hardie's installation spec calls for, not a spacing that's just "close enough to hold." Battens need to sit with the clearance the spec requires rather than being caulked flush and tight, so the wall can shed water instead of trapping it against the substrate.
Flashing and Trim Transitions
Every place a vertical run of board and batten meets a window, door, corner, or the base of the wall is a transition from a vertical surface to something else, and those transitions need flashing that's lapped correctly, not just caulked over. Caulk is a backup, not a substitute for the flashing detail doing its job.
Handling Factory-Finished Boards
ColorPlus boards arrive with their finish already cured, and that finish is one of the main reasons Hardie holds up as well as it does. Field cuts should be made face-down to protect the finish, and any cut edge needs to be primed before it goes on the wall. That matters everywhere, but it matters more on a job where getting a truck back out for a forgotten step isn't a quick errand.
The Part Most Contractors Don't Plan For: Getting Material and Crews to the Island
Lummi Island is reached by a small vehicle ferry with limited capacity and a fixed schedule, and that single fact changes how a siding job has to be planned before it changes anything about the wall itself. A contractor who treats an island job like any other mainland job — planning to run back for a forgotten bundle of trim or an extra box of fasteners — is going to lose real time waiting on ferry crossings, and that lost time tends to turn into shortcuts on install day. We plan island jobs around that reality instead of discovering it mid-project.
- Full material takeoff done before the first ferry crossing, so trim, fasteners, battens, and flashing all arrive with the siding instead of trickling over on follow-up trips
- Crew and equipment scheduled around ferry capacity and departure times, not squeezed in around them at the last minute
- Weather and sea-condition contingency built into the schedule, since ferry service can be affected by conditions that wouldn't touch a mainland job at all
- Boards protected and staged for transport so factory-finished edges and faces aren't damaged in loading, crossing, and unloading
- A single point of contact for the homeowner who can speak to both the install plan and the logistics plan, since on an island job the two are the same conversation
None of this changes what a correct board and batten wall looks like once it's up. It changes whether the crew shows up with everything they need on day one, or spends part of the job waiting on the next available crossing.
Our Process for a Lummi Island Board & Batten Project
Walkthrough and Assessment
We look at which walls face open water directly, which are more sheltered, and whether the existing wall assembly has any moisture issues that need addressing before new siding goes up. Board and batten over a wall with hidden damage just buries the same problem under a new surface.
Full Takeoff Before Anything Ships
Because a supply run isn't a quick trip here, we finalize batten spacing, trim details, and material quantities before the first board or fastener leaves the mainland. Working out the plan on paper first avoids field improvisation, which is exactly where corners get cut on any siding job and especially on one with limited resupply options.
Installation to Manufacturer Spec
Every fastener, drainage gap, and flashing lap follows James Hardie's published requirements for this climate zone. That's what keeps the manufacturer's warranty intact and what actually determines whether the wall performs for decades rather than years.
Final Walkthrough
We walk the finished job with you, cover the minimal maintenance board and batten actually needs, and make sure you know what a healthy seam looks like if you ever want to check the wall yourself down the road.
Cost Factors for Board & Batten on Lummi Island
Board and batten generally costs more per square foot than standard lap siding because of the added batten material and the extra labor of fastening and detailing two layers instead of one. On an island job, a few additional factors move the number beyond what a mainland estimate would show:
| Factor | Why It Matters |
|---|---|
| Wall exposure and orientation | Walls facing open water on multiple sides may need extra flashing attention and fastener spec |
| Existing wall condition | Moisture damage found during tear-off needs repair before new siding goes on |
| Batten spacing and reveal | Tighter spacing uses more material and more fastening labor |
| Trim and window detailing | Each opening adds flashing and finish work on a profile with more seams to begin with |
| Ferry logistics and scheduling | Material staging and crew scheduling around ferry capacity add planning time, reflected in the estimate rather than hidden as a surprise later |
We'll walk your specific property and give you real numbers based on your walls, your access, and your ferry logistics — not a rough square-footage number that ignores what an island job actually requires.
Why Hiring a Crew That Already Works Lummi Island Matters
Board and batten rewards experience with a specific location in a way a lot of siding profiles don't, because the failure points are subtle and slow to show up — a batten that's slightly too tight, a drainage gap that's slightly too shallow, a fastener spec that's fine for a sheltered wall but marginal on an exposed one. A crew that's actually worked jobs on Lummi Island has already solved the logistics problem, already knows which wall orientations need extra attention because of direct water exposure, and isn't learning the ferry schedule for the first time on your project. That's the difference between a board and batten wall that still looks and performs the same in fifteen years and one that's showing seam staining by year five because a mainland-only crew treated the island like an afterthought.
If you're considering board and batten siding for a home on Lummi Island, we're glad to walk the property, talk through what your specific walls and exposure actually need, and give you a straightforward, no-pressure estimate that accounts for the real logistics of the job. There's a form below — reach out and we'll set up a time to take a look.