Lynden Board & Batten Siding in Custer: Built for This Stretch of Whatcom County
Custer sits close enough to the water that salt air is a real factor in how siding ages, and far enough into farm country that wide-open exposure to wind-driven rain is just as much a concern. Board and batten siding — vertical panels with raised battens covering the seams — has always suited this kind of property. It reads as a clean, classic Northwest exterior on a farmhouse, a shop, or a newer build, and the vertical lines shed water differently than horizontal lap siding does. But "suited to the look" and "built to survive the climate" are two different things, and the gap between them is almost entirely about the materials and the installation details underneath the finish.
This page is about doing board and batten right, specifically for homes in and around Custer, using the one siding material we install: James Hardie fiber cement.
What Custer's Climate Actually Does to a Board & Batten Wall
Three things wear on siding here more than in a lot of other places, and board and batten designs interact with each one differently than plain lap siding does.
Salt Air
Proximity to Birch Bay and the Strait of Georgia means airborne salt is a slow, constant presence. It accelerates corrosion on any exposed metal — fasteners, flashing, trim edges — and it degrades cheap paint finishes faster than inland areas ever see. On a board and batten wall, the battens themselves create dozens of extra seams and nail lines compared to a plain lap job, which means dozens of extra places for a weak fastener or a thin paint film to start failing first.
Driving Rain
Whatcom County storms don't just fall straight down — wind pushes rain sideways against west and south-facing walls for hours at a time. Vertical board and batten can actually help here, since water runs down the face of the boards rather than pooling on horizontal ledges. But that only works if the battens are spaced and fastened correctly and if there's a real drainage plane behind the panels. Get those details wrong and driving rain finds its way behind the siding instead of running off it.
Moss Season
Shaded, north-facing walls and anything under tree cover stay damp for months at a stretch every fall through spring. Moss and algae don't just look bad — they hold moisture against the siding surface, which is exactly what accelerates rot in wood-based products and premature paint failure on anything not factory-finished for this climate.
What a Correct Board & Batten Installation Involves
A board and batten job that's going to hold up in Custer isn't just "panels plus strips of trim." There's a system underneath that most homeowners never see, and it's where the long-term performance is actually decided.
Drainage Plane First
Behind every panel, there needs to be a water-resistive barrier and, on most walls in this climate, a rainscreen gap — a small air space that lets any moisture that gets past the siding drain and dry out instead of sitting against the wall sheathing. This is non-negotiable on west and south exposures that take the brunt of driving rain.
Fastening Pattern and Materials
Board and batten has more linear fastening than lap siding — every board edge and every batten needs to be nailed correctly, at the right spacing, into solid framing. Given the salt air here, we use fasteners rated for the exposure, not whatever's cheapest. A corroding nail head under a batten is a slow leak waiting to happen.
Batten Spacing and Panel Gaps
Battens need consistent reveal and correct overlap on the panel seams beneath them, with the right gap left for the material to expand and contract with temperature swings. Too tight, and the panels can buckle; too loose, and water finds a path in.
Flashing at Every Transition
Window and door heads, roof lines, and the bottom starter course all need proper flashing detail. This is the single most common place we find failures on older board and batten homes we're asked to re-side — someone caulked a gap instead of flashing it, and years of driving rain eventually won that fight.
Panel System vs. Site-Built Board & Batten
There are two honest ways to build a board and batten wall with James Hardie products, and the right choice depends on the home.
| Approach | How it's built | Best fit |
|---|---|---|
| Hardie vertical panel system | Large fiber cement panels installed vertically, with HardieTrim battens fastened over the panel seams | Most new installs and full re-sides; fewer seams, faster install, very consistent reveal |
| Site-built board and batten | Individual HardiePlank or HardiePanel boards installed edge to edge, battens applied over each joint | Custom widths, matching an existing pattern, or blending with other Hardie profiles on the same wall |
Both are legitimate, code-compliant approaches when detailed correctly. We'll walk you through which one fits your home and your budget during the estimate rather than defaulting to whichever is easiest for us.
How We Handle a Custer Board & Batten Project
The process is the same whether it's a full re-side or new construction, and we don't skip steps to save a day.
- Walk and assess. We look at wall exposure, existing moisture damage, roofline transitions, and which sides take the worst of the driving rain.
- Tear-off and sheathing check. If we're removing old siding, we inspect the sheathing underneath for rot before anything new goes up — no covering up a problem.
- Water-resistive barrier and rainscreen. Installed to spec for the exposure level of each wall, not a one-size-fits-all approach.
- Panel or plank installation. Fastened per James Hardie's published specifications, with corrosion-resistant fasteners throughout.
- Battens, trim, and flashing. Every seam, corner, and penetration gets proper flashing before trim goes on — not caulk as a substitute.
- Final inspection. We check fastening, gaps, and finish before calling the job done.
Why James Hardie Is the Only Board & Batten We Install
We get asked why we don't offer LP SmartSide, vinyl board and batten panels, or unfinished wood options — all of which are cheaper up front. The honest answer is that we've standardized on one system because it's the one we trust to perform in this climate without callbacks.
James Hardie fiber cement is non-combustible, doesn't swell or rot the way wood-based composite products can when a fastener or seam eventually lets in moisture, and the ColorPlus factory finish is baked on with a UV- and moisture-resistant coating that holds up far better against moss and algae growth than field-applied paint. Hardie's HZ product lines are also engineered for specific climate zones, which matters in a region that swings between soaking wet winters and dry summer heat. It costs more than the alternatives. We think that cost is worth it on a wall system that's this exposed to salt air and driving rain, and we'd rather tell you that up front than sell you something we don't stand behind.
Signs Your Current Siding Is Telling You It's Time
- Soft or spongy spots when you press on the siding near the bottom edge or under windows
- Persistent moss or algae staining that comes back within a season of cleaning
- Paint that's peeling, bubbling, or chalking, especially on west and south walls
- Visible gaps or warping at board and batten seams
- Rust streaks running down from fastener heads or metal trim
- Rot or discoloration around window and door casings
Any one of these on its own might just need a repair. Several together, especially on an older wood or composite board and batten wall, usually means the underlying system has been letting moisture in for a while.
Why It Matters That We Already Work in Custer
Custer isn't a place we're guessing about. We know which exposures around here take the worst of the wind off the water, when moss season actually starts and ends on shaded walls, and how Whatcom County's permitting and inspection process works for a re-side or new build. That local familiarity shows up in small decisions — how a rainscreen gets detailed on a particularly exposed gable end, or which walls genuinely need it versus which don't — that a crew unfamiliar with this specific stretch of coastline and farmland might not think to ask about.
Get a Straight Answer on Your Project
If you're planning a board and batten exterior for a Custer property — new construction or a re-side — we'll come look at the walls, talk through panel versus site-built options, and give you a clear, no-pressure estimate. There's a form below to get started.