Lynden Siding Board & Batten in a Coastal Whatcom County Town
Ferndale sits close enough to Bellingham Bay and the Nooksack River delta that its weather behaves differently than towns further inland. Homes here deal with a steadier dose of salt-laden air, more driving rain off the water, and a moss season that runs longer than it does even a few miles east. Board and batten siding — vertical panels with raised strips covering the seams — is a popular choice for Ferndale homes because the strong vertical lines shed water differently than horizontal lap siding and give a clean, modern-farmhouse look that suits the area's mix of newer builds and older farmhouses alike. But the profile only performs as well as the material and installation behind it, and in a climate like this, that distinction matters more than it does in drier parts of the state.
This page covers what board and batten siding needs to hold up in Ferndale specifically, what a correct installation actually involves, and why we install it in James Hardie fiber cement only.
What Salt Air, Rain, and Moss Actually Do to Vertical Siding
Board and batten's vertical seams and exposed batten strips create more edges and more fastener penetrations per square foot than a lap profile does. Every one of those edges is a potential entry point for moisture if the material or the install is wrong for the conditions.
- Salt air: Corrodes exposed fasteners and accelerates the breakdown of coatings that aren't formulated to resist it, which shows up first as rust streaking below nail heads and battens.
- Driving rain: Wind-driven rain off the water pushes moisture sideways into seams that would stay dry in a calmer inland location, so drainage behind the siding — not just the surface finish — has to actually work.
- Moss and algae: A long damp season means organic growth gets a head start and holds moisture against the siding surface for months at a time, which is hard on materials that absorb water rather than shed it.
None of this means board and batten is a bad choice for Ferndale — it means the material and the details behind it need to be right for a marine-influenced climate, not just a Pacific Northwest climate in general.
Why We Install James Hardie for This Profile
We standardized on James Hardie fiber cement for every siding job we do, board and batten included, and this climate is a big part of why. Fiber cement is non-combustible and doesn't absorb moisture the way wood-based or engineered-wood panel products can, which matters when panels are running vertically and every batten strip is another seam exposed to wind-driven rain. Hardie's ColorPlus factory finish is baked on and warranted against fading and peeling, which holds up better under UV and salt exposure than field-applied paint on site-primed material. We don't install LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar board and batten — each of those has real strengths, but for a coastal Whatcom County exterior we've made fiber cement our standard rather than mixing materials project to project.
The Product System
James Hardie's board and batten options typically use a large-format vertical panel (HardiePanel) with HardieTrim battens fastened over the seams, or a true individual board-and-batten configuration depending on the look and budget. Both are engineered specifically for the Pacific Northwest's wet, marine-influenced climate under Hardie's HZ10 product line, which is formulated for regions like ours rather than a generic national spec.
What a Correct Installation Involves
Board and batten fails early almost exclusively because of installation shortcuts, not material failure. The profile is less forgiving than lap siding because there's no overlap doing the work of shedding water — the assembly behind the panel has to do it instead.
Drainage Plane and Rainscreen Gap
A weather-resistive barrier goes on the wall sheathing first, and in a climate this wet we install with a rainscreen gap behind the panels rather than flush-nailing straight to the barrier. That gap lets any moisture that does get past the surface drain and dry out instead of sitting against the sheathing.
Fastening and Flashing
Battens and panels need corrosion-resistant fasteners driven to Hardie's spec — over- or under-driven nails are one of the most common causes of early failure, and it's an easy detail to miss on a crew that doesn't install fiber cement daily. Flashing at every horizontal transition — window heads, roof lines, deck ledgers — has to be detailed correctly, because a vertical profile funnels water straight down to those points.
Panel and Batten Spacing
Fiber cement expands and contracts with temperature and moisture, so gaps at panel joints and clearance at the bottom of the siding above grade and hardscape need to follow Hardie's published clearances. Skipping this is invisible at installation and shows up as cracking or moisture staining a few years later.
Board and Batten vs. Other Siding Profiles for a Ferndale Exterior
| Factor | Board & Batten (vertical) | Lap Siding (horizontal) |
|---|---|---|
| Water-shedding behavior | Relies on drainage plane and detailing; more seams | Overlap sheds water by design; fewer critical seams |
| Look | Modern farmhouse, clean vertical lines, strong accent option | Traditional, most common in the area |
| Installation sensitivity | Higher — rainscreen and flashing detail is critical | Moderate — more forgiving of minor variance |
| Best local use | Full exterior or accent gables/entries | Full exterior, especially larger elevations |
| Moss/algae exposure | Battens create ledges that can hold debris if not detailed with drip clearance | Overlap naturally sheds debris |
Board and batten isn't the wrong choice for Ferndale — it's a common and attractive one, especially as a full exterior or as an accent on gables and entries paired with lap siding elsewhere on the home. It just demands more precision in the install, which is exactly where a lot of siding jobs go wrong.
Our Process on Ferndale Projects
1. On-Site Assessment
We walk the home and look specifically at exposure — which elevations take the most wind-driven rain, where moss has already established, and where old flashing or trim is failing. Ferndale's proximity to the water means exposure can vary a lot from the street-facing side of a house to the side facing open air toward the bay.
2. Prep and Removal
We remove existing siding down to the sheathing, check for hidden moisture damage or rot before covering anything back up, and address what we find rather than siding over a problem.
3. Drainage Plane and Rainscreen Install
Weather-resistive barrier and rainscreen furring go on next, sized and detailed for this climate rather than a one-size-fits-all approach.
4. Panel, Batten, and Trim Install
Hardie panels and battens go up to manufacturer spec — fastener pattern, clearances, and flashing at every penetration and transition.
5. Final Walkthrough
We inspect the finished job with the homeowner and confirm every detail — clearances, caulking, trim — before calling it done.
Why a Crew That Already Works Ferndale Matters
A contractor who works this stretch of Whatcom County regularly already knows which elevations on a typical Ferndale home take the worst of the driving rain, how aggressively moss establishes on north-facing walls near the water, and where salt exposure tends to eat fasteners fastest. That's not something you get from a general spec sheet — it comes from doing the work here repeatedly and seeing what holds up and what doesn't over years, not just at the walkthrough. It also means faster response if something needs a look after a bad storm season, rather than waiting on a crew based well outside the area.
Maintenance and Longevity
Board and batten in James Hardie fiber cement is low-maintenance compared to wood-based alternatives, but "low-maintenance" isn't "no-maintenance" in a climate like this.
- Rinse off moss and algae buildup once or twice a year, especially on shaded or north-facing walls
- Keep gutters clear so overflow doesn't run down the siding face repeatedly
- Watch for caulking that's cracked or pulled away at trim and window transitions and have it addressed before winter rains
- Trim back vegetation and landscaping that holds moisture against the lower courses
- Have flashing and clearances checked periodically, especially after major storms
Done right, a James Hardie board and batten exterior is built to handle this coastline for decades with basic upkeep — not a rebuild every few years.
If you're considering board and batten siding for a home in Ferndale, we're happy to take a look and walk you through what your specific exposure calls for. The estimate is free, there's no pressure, and you'll get a straight answer about what your home actually needs — just fill out the form below.