Lynden Siding Board & Batten in a Wet, Salt-Touched Corner of the Pacific Northwest
Board and batten has become one of the most requested siding profiles on both sides of the Whatcom County–Fraser Valley border, and it's easy to see why. The wide vertical panels and crisp battens read as farmhouse-modern on newer builds and fit naturally on the barns, outbuildings, and rural properties that dot this corridor. But the look is only half the story. Homes around Abbotsford, BC sit in the same marine-influenced weather system that shapes Lynden and the rest of Whatcom County: damp air moving inland off the Strait, long stretches of low cloud and drizzle, and driving rain that comes sideways more often than straight down. That combination is hard on any exterior wall assembly, and it is especially unforgiving of vertical siding installed without the right details underneath it.
This page is about that one job — board and batten siding, done for houses in and around Abbotsford, BC — and what separates a wall that looks good for two years from one that still looks good in twenty.
What This Climate Does to a Vertical Wall Over Time
Moss and Algae on a Board & Batten Profile
Board and batten creates more shadow lines and more horizontal ledges than flat lap siding — the top edge of every batten and every panel joint is a spot where moisture can sit. In a region with a long moss season and extended damp shoulder seasons in spring and fall, those ledges are where organic growth gets its first foothold, particularly on north- and east-facing walls that don't get much sun to dry them out.
Driving Rain and Wind-Driven Water
Vertical siding is oriented so that every seam, batten edge, and panel joint runs with gravity rather than against it — which sounds like an advantage, until wind pushes rain sideways into those same joints. Without a real drainage gap and correctly lapped flashing behind the panels, wind-driven rain finds its way behind the cladding, and once water is behind the siding, the assembly is depending entirely on the weather-resistive barrier and framing to dry it back out.
Salt Air and Coastal Moisture
This part of the lowland corridor sits close enough to the Strait and the bay systems that homes pick up a measure of salt-laden air, especially on exposed sides and upper stories. Salt-bearing moisture accelerates corrosion on exposed fasteners and trim hardware and speeds up the breakdown of paint films that aren't formulated to handle it — which is a real factor when you're choosing what material and what finish goes on a wall that faces decades of this weather.
Why We Install Only James Hardie for This Application
We don't install vinyl board and batten, engineered wood panel systems, or primed wood battens. That's a deliberate standard, not a lack of options. Vinyl vertical panels expand and contract more visibly in wide-format profiles and can warp or bow at the battens over time. Engineered wood and primed wood products depend on an intact paint film and diligent caulk maintenance to keep moisture out of the substrate — miss a re-coat cycle in a climate this damp, and the clock starts running on rot at the panel edges. Fiber cement doesn't carry that same vulnerability, and James Hardie is the fiber cement system we've standardized on.
HardiePanel Vertical Siding
HardiePanel is the base product for a board and batten wall — large-format fiber cement sheets installed vertically, then joined at the seams with battens. It's manufactured from cement, sand, and cellulose fiber, which means it doesn't absorb and swell the way wood-based panels can, and it won't feed the growth that untreated wood surfaces are prone to in a damp, shaded climate.
HardieTrim Battens
The battens that cover each seam are HardieTrim boards, milled to match the panel material so the whole wall expands, contracts, and weathers as one system rather than two dissimilar materials fighting each other at every joint.
ColorPlus Factory Finish
Where the finish matters most, ColorPlus is a factory-applied, baked-on coating rather than a job-site paint job. It's engineered to resist fading and hold up to UV and moisture exposure better than field-applied paint, and it carries its own finish warranty separate from the product's substrate warranty — which matters on a wall that's going to see decades of this region's rain and salt air before it ever needs attention.
What a Correct Board & Batten Installation Actually Involves
A Real Rainscreen Gap
Vertical siding needs a drainage gap behind it — typically furring strips or a purpose-built rainscreen product — so that any water that does get past the cladding has somewhere to go and dry out instead of sitting against the weather barrier. This is the single detail most likely to be skipped by a crew unfamiliar with vertical assemblies, and it's the one that determines whether a wall sheds incidental moisture or traps it.
Blocking Behind Every Batten
Wall studs run vertically, which is fine for horizontal lap siding but means a vertical panel and its battens need solid horizontal blocking behind them to fasten into. Skipping blocking, or spacing it too far apart, is how you end up with panels that flex, batten fasteners that miss solid backing, and seams that open up over a few seasons.
Flashing at Every Penetration and Joint
Every window, door, and horizontal panel butt joint needs flashing detailed to shed water outward and downward, lapped correctly with the weather-resistive barrier underneath. On a wall that's going to take driving rain from multiple directions across a wet season, this detail is not optional trim work — it's the difference between a dry wall cavity and a slow, hidden moisture problem.
| Factor | Board & Batten (Vertical) | Traditional Lap Siding |
|---|---|---|
| Drainage detailing | Requires furring/rainscreen gap behind every panel | Often achievable with a simpler wrap and lap detail |
| Fastening | Needs horizontal blocking behind vertical framing | Fastens directly to vertical studs |
| Visual seams | Fewer horizontal reveals, more vertical joints to flash | Continuous horizontal reveals, fewer penetrations per course |
| Moss/algae exposure | Batten ledges can hold moisture on shaded walls | Sloped lap edges shed water more readily |
| Typical use | Farmhouse, modern, accent walls, gables | Traditional and transitional home styles |
Our Process, Start to Finish
- On-site assessment — we look at wall orientation, existing moisture damage, current siding condition, and which elevations take the most wind-driven rain.
- Tear-off and sheathing check — old cladding comes off and the sheathing underneath gets inspected for rot or soft spots before anything new goes up.
- Weather-resistive barrier — a new WRB is installed and lapped correctly at every seam, window, and door.
- Rainscreen furring — vertical or cross-strapped furring creates the drainage gap behind the panels.
- Blocking installation — horizontal blocking goes in wherever battens and panel edges will land.
- Flashing — head, sill, and joint flashing installed before a single panel goes up.
- HardiePanel and HardieTrim installation — panels set, battens installed over seams, fastened to blocking per Hardie's published fastening schedule.
- Sealant and finish check — joints sealed where specified, ColorPlus finish inspected for any touch-up needs.
What to Look For in a Correctly Finished Job
- A visible gap or rainscreen material behind the panel edges — not siding nailed flat against the house wrap
- Straight, tight batten lines with consistent reveal widths
- Flashing visible (or evidence of it) above every window and door head
- No caulk used to "fix" gaps that should have been solved with proper flashing
- Fastener heads set flush, not overdriven, and placed into confirmed blocking
- A finish warranty document separate from the general product warranty
Why It Matters That We Already Work This Area
Board and batten forgives almost nothing when it's installed by a crew that's only done a handful of vertical jobs. The blocking layout, the rainscreen detailing, and the flashing sequence are all different from a standard lap siding install, and a crew that treats it like "lap siding turned sideways" is how you end up with the seam failures and trapped moisture described above. Working this corridor regularly — from Lynden through the border area into Abbotsford, BC — means we've seen how these walls actually perform through a full wet season here, not just how they look on installation day. That's knowledge you can't get from a spec sheet: which elevations on a typical lot take the worst of the wind-driven rain, how much moss pressure a shaded north wall is really going to see, and where the salt-laden air off the water does the most damage to unprotected fasteners and trim.
What Affects the Cost of a Board & Batten Project
Every project is different, but the main cost drivers on a board and batten job are consistent: the condition of the existing sheathing once old siding comes off, how much of the wall needs new blocking versus reusing existing framing, the amount of trim and flashing detail around windows and doors, and the overall square footage and wall height involved. Rather than quote a number that doesn't reflect your specific house, we walk the property, look at what's underneath the current siding where we can, and give you a written estimate based on what your walls actually need.
If you're considering board and batten for a home in Abbotsford, BC or anywhere in the surrounding Lynden area, we're happy to come take a look and talk through what your walls specifically need given their orientation and current condition. The estimate is free, there's no pressure, and you'll get a straight answer about what the job involves — just fill out the form below to get started.