Blaine Window Board & Batten in Custer: A Look Built for the Land, Tested by the Weather
Board and batten has a long history in farm country, and Custer is farm country. The look — wide vertical panels with narrow strips covering the seams — reads as clean, tall, and a little more architectural than standard lap siding, which is part of why it shows up so often on the barns, outbuildings, and farmhouse-style homes scattered around this part of Whatcom County. It's a good match for the rural character out here. But a board and batten job that looks right on installation day and a board and batten job that still looks right in fifteen years are two different projects, and the difference almost always comes down to what's happening behind the panels, not what you can see from the road.
This page is specifically about board and batten siding for homes in and around Custer — what the local climate does to vertical siding over time, what a correctly built assembly needs to hold up to it, and why we only do this work in James Hardie fiber cement.
What Whatcom County Weather Does to Vertical Siding
Custer sits close enough to the Salish Sea and the open farmland around Blaine that homes here take on a specific combination of weather stress. None of it is dramatic on any given day, but it's relentless over the life of a siding job.
Salt Air
Being a few miles off saltwater still means salt-laden air moves through on prevailing winds, especially with winter storms. Salt accelerates corrosion on fasteners, trim flashing, and any metal component in the wall assembly, and it settles into porous or poorly sealed siding surfaces over time. Materials and hardware that aren't rated for coastal exposure age faster here than the same products would fifty miles inland.
Driving Rain
This isn't a gentle-drizzle climate. Storms off the water push rain sideways against west- and southwest-facing walls, and vertical board and batten siding has more seams per square foot than horizontal lap siding — more places for wind-driven water to find a way in if the assembly behind it isn't built to shed it. The batten strips themselves, if installed wrong, can actually funnel water down into the seam instead of covering it.
A Long Moss Season
Whatcom County's wet season runs long, and shaded north walls, tree-lined lots, and low points along the siding stay damp for months at a time. That's exactly the environment moss and algae need. On absorbent or poorly finished siding, that damp period turns into staining, surface breakdown, and — if moisture actually gets past the cladding — rot in the wall behind it.
Why We Install Only James Hardie Board & Batten Here
We don't offer vinyl board and batten, LP SmartSide board and batten, or cedar board and batten. That's not a marketing position — it's a standard we hold because of what this specific climate does to those materials over a couple decades. We install James Hardie fiber cement exclusively, and board and batten is one of the profiles it does especially well.
The HardiePanel System
Hardie's board and batten look is built from HardiePanel vertical siding — solid fiber cement sheet — with batten strips (also fiber cement, not wood) fastened over the seams. Because the whole system is fiber cement, you're not mixing a moisture-stable field material with wood-based or vinyl trim that expands, contracts, or rots at a different rate. Everything in the visible assembly ages the same way, which matters over the long, wet stretches typical of a Whatcom County winter.
Panels come with a factory-applied ColorPlus finish, which is baked on under controlled conditions rather than field-sprayed. That finish is what actually resists the moss staining and UV fading that hit unfinished or site-painted siding hardest, and it's backed by its own finish warranty separate from the substrate warranty.
What Vinyl and LP SmartSide Board & Batten Leave on the Table
Vinyl board and batten is inexpensive and low-maintenance in mild climates, but it's a thin extruded plastic profile that becomes brittle in cold snaps, expands and contracts more than fiber cement, and can warp or bow over furring strips if it isn't installed with enough clearance for movement. It also isn't fire-rated the way fiber cement is.
LP SmartSide is an engineered wood product — wood strand substrate with a resin-saturated overlay. It performs reasonably well when the finish stays fully intact, but any breach in that surface (a fastener hole, a cut edge, a scrape from a ladder) exposes wood fiber that can wick moisture and swell. In a climate with this much sustained dampness, that's a maintenance liability we're not willing to install and stand behind. Cedar board and batten is beautiful but demands a real, ongoing refinishing schedule to resist the same moss and moisture problems — skip a cycle or two and it shows fast out here.
What a Correct Board & Batten Job Actually Requires
Board and batten is less forgiving of shortcuts than lap siding, mostly because of how many vertical seams it has and how those seams handle water. A correct install has a few non-negotiable pieces.
Rainscreen and Drainage Plane
Behind the panels, there needs to be a proper weather-resistive barrier and a drainage gap — a rainscreen — so any moisture that does get past the cladding has somewhere to go besides the sheathing. This matters more on vertical siding than horizontal, because water traveling down a batten seam has a straight vertical path to follow if there's no gap to break it up and drain it out at the bottom.
Fastening, Gaps, and Flashing
Panels need to be fastened per Hardie's published spec — correct fastener type, spacing, and depth — not just "close enough." Panel-to-panel and panel-to-trim gaps need to match Hardie's expansion allowances, and every horizontal butt joint needs flashing behind it, not just caulk over it. Caulk is a surface seal; flashing is what actually redirects water. Skipping the flashing and relying on caulk alone is one of the most common ways board and batten jobs fail early, and it's not something you can see from the ground once the job is finished and painted.
Caulk, Paint, and Finish Details
Even with a factory finish, the field-applied caulk at joints, corners, and penetrations needs to be a paintable, flexible, high-quality sealant — not a cheap acrylic that shrinks and cracks after one winter. Cut panel edges need factory or field-applied touch-up sealer so raw fiber cement isn't left exposed to soak up water at every seam.
Material Comparison for Custer Homes
| Factor | James Hardie Board & Batten | Vinyl Board & Batten | LP SmartSide Board & Batten | Cedar Board & Batten |
|---|---|---|---|---|
| Moisture behavior | Non-organic, dimensionally stable | Won't rot, but can warp/bow | Wood-based core, vulnerable at cut edges and fastener holes | Absorbent; needs sealed/finished surface maintained |
| Moss/algae resistance | ColorPlus factory finish resists staining | Moderate; can stain in shaded, damp areas | Moderate while finish is intact | Low without regular treatment |
| Maintenance | Occasional wash, repaint on your own schedule | Low, but limited repair options if damaged | Finish upkeep required to protect wood core | Refinishing every few years |
| Fire resistance | Non-combustible | Combustible | Combustible | Combustible |
| Typical lifespan/warranty | Long-life substrate, transferable warranty | Moderate, shorter practical lifespan in this climate | Moderate, finish-dependent | Highly maintenance-dependent |
Our Installation Process
The process is the same discipline every time, whether it's a full re-side or a single wall:
- On-site assessment of the existing wall assembly, moisture readings where relevant, and a look at how each elevation is exposed to prevailing wind and rain.
- Removal of old siding down to the sheathing and repair of any water-damaged framing found underneath — this is common enough on older Whatcom County homes that we budget time for it rather than treat it as a surprise.
- Installation of a weather-resistive barrier and rainscreen drainage gap before any siding goes up.
- HardiePanel and batten installation to manufacturer fastening, gap, and flashing specifications, with particular attention to butt joints, corners, and window/door penetrations.
- Field sealing of cut edges and joints, and a final walk-through so you know exactly what was done and where.
Why a Crew That Works Custer Regularly Makes a Difference
A lot of siding problems in this area trace back to installers applying a generic spec that works fine in a drier climate but isn't tuned for sustained coastal rain and a long damp season. A crew that regularly works Blaine, Custer, and the surrounding parts of Whatcom County already knows which elevations take the worst of the wind-driven rain, how much drainage detail is actually needed behind vertical siding here, and how long the moss season runs before it starts affecting an unfinished or poorly sealed surface. That local pattern recognition shows up in the small decisions — where to add extra flashing, how tight to run panel gaps, which walls need the most attention — that a one-time visiting crew is more likely to miss.
What to Look for in a Correctly Installed Board & Batten Job
- A visible drainage gap (rainscreen) behind the panels, not siding fastened directly to the weather barrier
- Flashing behind every horizontal butt joint, not caulk used as the only seal
- Consistent, spec-correct gaps between panels and at trim, not tight-fit joints that leave no room for movement
- Fastener spacing and placement that matches the manufacturer's published pattern
- Sealed cut edges on every panel, especially around windows, doors, and corners
- A factory-finished product like ColorPlus rather than a field-only paint job as the primary UV and moisture defense
If you're weighing board and batten siding for a home in Custer, we're glad to take a look and walk you through what your specific walls and exposure would need. Fill out the form below for a free, no-pressure estimate.