Ferndale Board & Batten in Cordata: A Style Choice That Has to Survive Whatcom County Weather
Board and batten has become one of the most requested siding profiles for homes in and around the Cordata area — it shows up on modern farmhouse remodels, craftsman-style additions, and accent walls on otherwise lap-sided homes. It's a good look. But board and batten is also one of the least forgiving profiles when the material or the installation is wrong, and this part of Whatcom County doesn't give a siding job much room for error. Salt-influenced marine air, long stretches of driving rain off the water, and a moss season that can run from early fall into late spring all put real stress on vertical siding joints, fastener lines, and the wall assembly behind them.
This page is about that one combination: board and batten siding, done correctly, for homes in the Cordata area. Not a general primer on siding styles — the specific job of getting this profile to hold up here.
Why This Climate Is Harder on Board & Batten Than People Expect
Driving rain finds vertical seams
Lap siding is designed so gravity does most of the water-shedding work — each board overlaps the one below it. Board and batten relies instead on vertical battens covering the seams between wide boards, and those seams run straight up and down the wall. When wind-driven rain comes off the water sideways instead of straight down, it can push moisture sideways into those vertical joints if the battens, caulking, and flashing details aren't installed correctly. A profile that looks identical from ten feet away can behave very differently in a storm depending on what's underneath it.
Moss and algae favor the shaded, damp faces of a home
Whatcom County's wet season is long, and north- and west-facing walls that stay shaded and damp for months at a time are where moss and green algae take hold first. Board and batten's raised battens create more surface texture and more shadow lines than flat lap siding, which means more places for moss spores to catch and hold moisture against the wall if the material itself doesn't resist it.
Salt air accelerates corrosion at every fastener and seam
Homes anywhere near Bellingham Bay and the Strait of Georgia deal with salt-laden air that speeds up corrosion on exposed metal — nail heads, flashing, trim fasteners. Board and batten uses more linear feet of fastening and more trim pieces per square foot of wall than a plain lap job, so there are simply more places for salt-driven corrosion to start if the wrong fasteners or flashing metals are used.
What a Correct Board & Batten Installation Actually Involves
The visible battens are the last thing installed and the least important part of keeping water out. The parts that actually determine whether a board and batten wall lasts are underneath:
- A continuous water-resistive barrier (WRB) installed shingle-fashion behind the siding, lapped correctly at every seam and penetration.
- A rainscreen air gap between the WRB and the siding boards, so any moisture that does get past the battens can drain and dry instead of sitting against the wall sheathing.
- Correct batten spacing and fastening so boards can expand and contract with temperature and moisture swings without cracking the caulk line or pulling fasteners.
- Flashing at every horizontal transition — window and door heads, roof-to-wall intersections, and the base of the wall — not just caulk covering a gap.
- Corrosion-resistant fasteners and trim metal rated for coastal or marine-influenced exposure, not standard interior-grade hardware.
Skip any one of these and the wall may look fine for a year or two before moisture problems show up behind the boards, often after the point where a simple repair is possible.
Material Comparison: What We'll Install and What We Won't
We install James Hardie fiber cement board and batten exclusively. We don't install LP SmartSide, vinyl board and batten, or raw cedar board and batten, and it's worth being specific about why — each has a real trade-off that shows up over time in this climate.
| Material | How it handles moisture & moss | Long-term maintenance | Why we do or don't install it |
|---|---|---|---|
| James Hardie fiber cement | Non-combustible, doesn't swell or rot from moisture, factory ColorPlus finish resists moss/algae staining better than bare wood | Occasional wash; finish holds color for years under warranty | Our standard install — engineered specifically for wet, humid climates |
| LP SmartSide (engineered wood) | Wood-based core is more moisture-sensitive at cut edges and seams than fiber cement | Edge sealing and caulk maintenance is more critical to prevent swelling | We don't install it — the wood-based core adds a moisture-management burden we don't think is worth it here |
| Vinyl board and batten | Won't rot, but can warp or fade, and seams can allow water behind the panel with no absorbent backing to dry against | Low upkeep but limited repair options and shorter realistic lifespan | We don't install it — thin material and appearance don't match the standard we hold |
| Cedar (raw or primed) | Attractive but naturally absorbs moisture; prone to moss growth without frequent treatment | Requires re-staining or re-sealing on a recurring cycle | We don't install it — the maintenance cycle is heavier than most owners want to commit to |
None of these are "bad" products in every application. But for board and batten specifically, on homes exposed to Whatcom County's rain and salt air, we've standardized on Hardie because it holds up with the least ongoing intervention from the homeowner.
Our Process on a Cordata-Area Board & Batten Job
1. Assessment of the existing wall
Before we talk materials, we look at what's actually happening on the wall now — where moss has taken hold, which elevations show water staining, and what condition the sheathing is in underneath the current siding. This tells us whether it's a straightforward re-side or whether there's rot repair to address first.
2. Removal and sheathing check
We strip the old siding down to the sheathing rather than installing over it, because you can't verify or correct a failing WRB or rotted sheathing from the outside.
3. WRB, rainscreen, and flashing installation
This is the stage that determines whether the job lasts. We install a continuous water-resistive barrier, a drainage gap, and flashing at every horizontal transition before a single piece of Hardie goes up.
4. Board and batten installation to spec
James Hardie panels and battens are installed with the fastener spacing, gapping, and caulking called for in the manufacturer's instructions — not shortcuts that speed up the job but shorten its life.
5. Final walkthrough
We check every seam, corner, and penetration before we consider the job finished, because a board and batten wall only fails at its weakest joint.
Why Hiring a Crew That Already Works This Area Matters
Board and batten technique doesn't change from town to town, but the conditions it has to survive do. A crew that already does regular work around Ferndale and the Cordata area has a working sense of which elevations on a typical local home take the worst of the driving rain, how long moss actually takes to establish itself on a shaded wall here versus a drier climate, and what flashing and fastener choices hold up against salt-influenced air over years, not just through one inspection. That's the kind of judgment that shows up in the details you can't see once the siding is on — not something a crew passing through the county for one job is likely to have dialed in.
What Affects the Cost of a Board & Batten Project
Board and batten typically costs more per square foot to install than plain lap siding because it uses more linear trim and more labor hours for the same wall area. Rough cost drivers on most projects include:
- Wall complexity — corners, window/door openings, and multi-story sections all add trim and labor time.
- Condition of the existing wall — whether sheathing repair or additional flashing work is needed once old siding is removed.
- Panel and batten dimensions chosen — wider board spacing uses fewer total pieces but different fastening requirements than narrow spacing.
- Color and finish — factory-applied ColorPlus finishes cost more upfront than field-painted siding but remove a recurring repainting expense.
- Accessibility — scaffolding or lift needs for taller walls or tight lot lines common in denser residential areas.
We give homeowners a specific number after walking the actual wall, not a generic per-square-foot rate that ignores the condition of what's underneath.
Maintaining Board & Batten Siding Through the Wet Season
- Rinse shaded, moss-prone elevations (typically north- and west-facing) once or twice a year before moss gets established.
- Walk the exterior after major windstorms and check for anything loose at trim edges or corner boards.
- Keep gutters clear so overflow doesn't run down the wall face and concentrate moisture at specific seams.
- Trim back landscaping that shades a wall and keeps it damp longer than the rest of the house.
- Have caulked joints checked periodically — caulk is a maintenance item on any siding profile with vertical seams, regardless of material.
If you're weighing board and batten for a home in the Cordata area, we're glad to walk the property, look at what the current siding and wall assembly are doing, and put together a straightforward, no-pressure estimate — use the form below to get started.