Birch Bay Siding Board & Batten Siding for Ferndale Homes
Ferndale sits close enough to Birch Bay and the Strait of Georgia that its houses deal with the same coastal weather pattern the whole area shares: salty marine air, long stretches of driving rain off the water, and shaded, damp corners of the yard where moss and algae never really stop growing. Board and batten siding — vertical panels with raised battens covering the seams — is a popular look for Ferndale homes because it reads as clean and modern, but it behaves differently than horizontal lap siding once weather gets involved. The vertical seams, the batten spacing, and the way water sheds down the wall all matter more here than they would in a drier inland climate.
This page is about that one service, in this one area: what a correctly built board and batten wall needs to survive Whatcom County's coastline, and how we approach it on Ferndale homes specifically.
What Salt Air, Rain, and Moss Actually Do to a Board & Batten Wall
Board and batten siding has more vertical seam length than a lap-sided wall of the same size, and every one of those seams is a place where wind-driven rain can be pushed upward and sideways instead of just running down. Add in salt-laden air off the water and you get a slow, steady corrosion pressure on fasteners and trim hardware that inland siding never has to deal with. And in the shaded, north-facing, tree-covered sections that are common on Ferndale lots, moss and algae take hold on any surface that stays damp for more than a day or two after a storm.
Where Problems Actually Start
On a poorly built board and batten wall, the failure almost always starts in the same three places: behind the battens where caulk was used instead of proper flashing, at the bottom termination where water can wick up into the panel edge, and around window and door trim where the vertical panel meets a horizontal transition. None of these are exotic problems — they're just the predictable result of a detail-heavy siding style being installed like it's a simple lap job.
Board & Batten vs. Horizontal Lap in This Climate
| Factor | Horizontal Lap Siding | Board & Batten |
|---|---|---|
| Water shedding path | Simple, overlapping courses shed water straight down | Vertical seams need battens and flashing to shed water correctly |
| Seam exposure to wind-driven rain | Lower — horizontal laps are self-shielding | Higher — vertical seams face more direct wind pressure off the water |
| Moss/algae risk on shaded walls | Moderate | Moderate to higher on batten edges if airflow behind panels is blocked |
| Installation forgiveness | More forgiving of minor spacing errors | Less forgiving — batten spacing and fastening pattern must be consistent |
Why We Only Install James Hardie for This Look
Board and batten is offered in several materials — vinyl, engineered wood, and various fiber cement brands — but we install James Hardie fiber cement exclusively, and board and batten is actually one of the styles where that decision matters most. Vinyl board and batten panels expand and contract with temperature swings, which stresses the batten fastening pattern over time, and it doesn't hold up to direct wind-driven rain impact as well as a rigid material. Engineered wood products are more moisture-sensitive at cut edges and panel seams, which is exactly where board and batten has the most exposed seam length.
James Hardie's fiber cement doesn't swell, rot, or feed moss the way wood-based products can, and it holds paint or factory finish without the expansion problems vinyl has. For Ferndale's combination of salt air and sustained rain exposure, that difference shows up over the life of the siding, not in the first year.
The Products We Use for Board & Batten
We build board and batten walls using HardiePanel vertical siding with HardieTrim battens over the seams, finished in factory-applied ColorPlus color. The factory finish matters specifically for this style: because board and batten has so much vertical trim and seam line, a field-painted finish shows wear at those seams first. ColorPlus is baked on before the panel ever reaches the jobsite and carries its own finish warranty, so the seams and battens age at the same rate as the field of the wall instead of failing first.
What a Correct Board & Batten Installation Actually Involves
Drainage Behind the Panel
The single biggest difference between a board and batten wall that lasts and one that doesn't is what's happening behind the panel, not on the surface. A proper installation includes a drainage gap or rainscreen behind the siding so that any moisture that does get past the surface has somewhere to go besides straight into the sheathing. This matters everywhere, but it matters more in Ferndale because the wall is wet more often than it's dry for large parts of the year.
Flashing, Not Just Caulk
Battens should be installed over properly lapped water-resistive barrier and flashed at every horizontal transition — window heads, water tables, and roof-to-wall intersections. Caulk has a place in this system, but it's a secondary seal, not the primary line of defense. A wall that depends on caulk to stay dry is a wall that starts leaking the year the caulk starts to shrink.
Fastener Choice and Spacing
Because board and batten carries more visible fastening than lap siding, fastener corrosion resistance matters more here — salt air will find any weak point in hardware over the years. Battens also need consistent spacing and blocking behind them where required, both for the finished look and so the panel underneath isn't left to flex in wind.
Our Process for Ferndale Board & Batten Projects
- On-site walkthrough of the home, checking wall exposure to prevailing wind and rain direction, existing moisture damage, and shaded/moss-prone areas
- Measurement and material plan, including batten layout and trim details around windows, doors, and corners
- Removal of existing siding where applicable, with a check of the sheathing underneath before anything new goes on
- Installation of water-resistive barrier, drainage gap, and flashing at all penetrations and transitions
- Panel and batten installation to manufacturer fastening specifications
- Final trim, caulking of secondary joints, and a walkthrough with the homeowner
What Drives Cost on a Board & Batten Project
| Factor | Why It Matters |
|---|---|
| Home size and number of stories | More wall area and higher access needs both add labor time |
| Condition of existing siding and sheathing | Hidden moisture damage found during tear-off can add repair scope |
| Window, door, and corner trim count | Board and batten has more trim detail per square foot than lap siding |
| Batten spacing and pattern chosen | Tighter spacing or custom patterns add material and labor |
| Color | Factory ColorPlus finishes cost more upfront than standard primed panel but avoid repainting seams later |
Living With Board & Batten Siding Near the Water
Even with the right materials and a correct installation, board and batten siding in this climate benefits from a bit of routine attention. None of it is complicated, but it's worth doing on a schedule rather than only after something looks wrong.
- Rinse salt residue off the siding a couple of times a year, especially on walls facing open water or prevailing wind
- Walk the property after the wet season and check for moss or algae starting on shaded batten edges
- Keep gutters clear so overflow isn't running down the face of the siding
- Check caulk lines at trim and penetrations annually — caulk is a maintenance item, not a permanent seal
- Trim back vegetation and tree cover that keeps a wall section shaded and damp longer than the rest of the house
Why Hiring a Crew That Already Works Ferndale Matters
Board and batten's failure points aren't theoretical — they show up in predictable spots once you've seen how Whatcom County's coastal weather behaves on a wall over a few seasons. A crew that already works in and around Ferndale and Birch Bay has seen which wall orientations take the worst of the wind-driven rain, which yards hold shade and moisture longest, and how local permitting and inspection expectations run. That's the difference between a crew executing a generic install and one building a wall specifically for the conditions it's going to face.
If you're weighing board and batten siding for a home in Ferndale, we're happy to walk the property, talk through where your specific exposure risks are, and put together a straightforward estimate. There's no pressure and no obligation — just a clear look at what your home needs.