Lynden Exterior Board & Batten in a Working Whatcom County Town
Ferndale sits close enough to the Salish Sea to feel it in the weather, and that combination of coastal moisture and small-town, semi-rural character is exactly where board and batten siding tends to shine. The style reads as clean and vertical on newer farmhouse-style builds, and it sits comfortably on older rural properties, outbuildings, and ranch homes that make up a lot of the housing stock around Ferndale. It is a distinctive look, but it is not a low-maintenance one by default — board and batten has more seams and more places for water to travel than a standard lap profile, which matters a great deal in this climate.
This page is specifically about board and batten siding installed on homes in and around Ferndale. It is not a general overview of the product — it is what this profile needs to hold up against salt air, wind-driven rain, and a moss season that runs longer here than it does in drier parts of the state.
What Ferndale's Climate Puts Board & Batten Siding Through
Whatcom County weather is not extreme, but it is relentless. Homes near Ferndale deal with a steady combination of marine air, low winter sun angles, and months of damp, mild conditions that never fully dry the exterior of a house out. Board and batten siding, with its vertical battens and butt joints, interacts with that weather differently than horizontal lap siding does.
Salt Air and Corrosion
Proximity to the Salish Sea means airborne salt is a real factor on exterior metal — fasteners, flashing, and trim. Cheap or mismatched fasteners corrode faster near the coast, and a corroded fastener under a batten is a hidden problem until the batten starts to separate or streak with rust. This is one of the more overlooked details in board and batten installation, and it is a bigger deal here than it would be for a home fifty miles inland.
Wind-Driven Rain and Vertical Joints
Pacific storm systems bring rain that does not just fall straight down — it drives sideways against west- and southwest-facing walls. Board and batten has vertical seams running the full height of the wall, and every one of those seams is a potential entry point if the drainage plane and flashing details behind the siding are not done correctly. This is the single biggest reason board and batten needs a more careful installation approach than it might get in a drier climate.
Moss, Mold, and the Long Wet Season
Shaded walls, tree cover, and months of damp air add up to a long moss and mildew season in this part of Whatcom County. Moss holds moisture against the siding surface far longer than open air would, which shortens the life of paint finishes and, over time, stresses whatever is underneath. North-facing walls and anything under tree canopy need siding and a finish that can take that kind of sustained damp exposure without breaking down.
What a Correctly Installed Board & Batten Job Actually Involves
Board and batten looks simple from the curb, but the difference between a job that lasts and one that fails early almost never shows on the surface — it's in the assembly behind the boards. A correct installation includes:
- A drainage gap (rainscreen) between the siding and the water-resistive barrier, so any moisture that gets past the surface can drain and dry out instead of sitting against the wall
- Manufacturer-specified fastener type, length, and placement — not generic fasteners chosen for convenience
- Proper flashing at every horizontal joint, window, door, and roof-to-wall intersection, installed to shed water down and out rather than relying on caulk to do that job
- Correct batten spacing and fastening so panels can expand and contract without cracking the finish or pulling fasteners loose
- Sealant used as a backup layer, not as the primary water barrier — caulk fails over time, and a wall that depends on it is a wall that will eventually leak
Skipping any one of these does not usually cause a visible problem in year one. It shows up in year five or six, as staining, soft trim, or a batten that has started to separate — and by then the fix involves opening up the wall, not just recaulking.
Why We Only Install James Hardie for Board & Batten
We install James Hardie fiber cement exclusively — we do not install vinyl board and batten, LP SmartSide, primed spruce, cedar, or other fiber cement brands like Allura or Cemplank. That is a deliberate standard, and homeowners deserve the honest reasoning behind it, not just a brand name.
Vinyl board and batten is inexpensive and low-maintenance in the sense that it never needs painting, but it is a thin plastic product that flexes, fades unevenly with UV exposure, and can become brittle in cold snaps. In a marine climate with driving rain, vinyl's seams and expansion joints are also a weaker water-management system than a properly detailed fiber cement assembly.
LP SmartSide is an engineered wood (OSB strand) product with a wax and resin treatment for moisture resistance. It performs reasonably well when installation is precise, but it is still wood at its core — meaning cut edges, fastener penetrations, and any breach in the factory coating are vulnerable to moisture intrusion in exactly the kind of sustained damp climate Ferndale sees. Cedar and primed spruce board and batten are attractive but carry ongoing maintenance burdens — repainting, caulk renewal, and vulnerability to moss and rot — that are hard to keep up with in a climate this wet for this much of the year.
James Hardie fiber cement is cement, sand, and cellulose fiber — it does not rot, does not attract moisture into a wood substrate, and is non-combustible. The ColorPlus factory finish is baked on and warranted separately from the substrate, which matters in a climate where field-painted finishes tend to fail early on north-facing and shaded walls. Hardie's HZ5 product formulation is engineered for climates with freeze-thaw and heavy moisture cycling, which describes Whatcom County well. It is not the cheapest option on the table, but it is the one we are willing to stand behind on homes that have to deal with what this coastline throws at them.
Our Board & Batten Installation Process
Every board and batten job we do in the Ferndale area follows the same sequence, because skipping steps is where failures start:
1. On-Site Assessment
We look at wall orientation, tree cover, existing moisture damage, and how the current siding (if any) has held up. West- and southwest-facing walls, and anything under shade, get flagged for extra attention to drainage and flashing.
2. Tear-Off and Sheathing Inspection
Old siding comes off so we can actually see the sheathing underneath. Soft or water-damaged sheathing gets replaced before anything new goes on — installing new siding over compromised sheathing just hides the problem.
3. Water-Resistive Barrier and Rainscreen
We install the weather barrier and drainage gap system correctly detailed around every penetration — windows, doors, hose bibs, vents, and roof lines — before the first panel goes up.
4. Hardie Panel and Batten Installation
Panels and battens go up to manufacturer fastening specifications, with corners, trim, and joints flashed and sequenced to shed water downward at every layer.
5. Finish and Final Inspection
With ColorPlus prefinished product there's no field painting required at seams beyond touch-up; with field-finished trim we make sure paint is applied to spec. We walk the finished wall for fastener pattern, caulk lines, and flashing before calling the job done.
Cost Factors for Board & Batten Siding
Board and batten pricing varies by project, and we don't publish blanket numbers because wall complexity matters more than square footage alone. These are the factors that actually move the price:
| Factor | Why It Affects Cost |
|---|---|
| Tear-off vs. new construction | Removing and disposing of old siding, and repairing any sheathing found underneath, adds labor beyond a bare-wall install |
| Wall height and access | Two-story walls, steep grades, and limited scaffold access all add time and equipment cost |
| Trim and corner detail | Board and batten with mitered corners, window casing, and custom trim takes more time than a simple field of panels |
| Rainscreen installation | A proper drainage gap adds a labor and material step, but it's the difference that protects the investment long-term |
| Prefinished ColorPlus vs. field paint | Prefinished panels reduce on-site painting labor and come with a separate finish warranty |
| Moisture damage discovered at tear-off | Rotten sheathing or framing found once old siding is off has to be repaired before new siding goes on |
Maintenance in a Salt Air, Moss-Prone Climate
Fiber cement is low-maintenance, not no-maintenance. In this climate, a few habits go a long way:
- Rinse the exterior periodically, especially walls that face open air, to reduce salt and airborne grime buildup
- Use a soft wash approach (not a high-pressure wash) if moss or algae builds up on shaded walls — pressure washing can drive water behind panels and damage caulk lines
- Keep gutters and downspouts clear so roof runoff isn't dumping extra water directly onto siding below
- Trim back vegetation and tree limbs that keep a wall shaded and damp longer than it needs to be
- Have caulk joints and flashing checked every few years — sealant is a wear item, and catching a failed joint early is a small fix compared to what happens if it goes unnoticed
Why a Crew That Already Works Ferndale Matters
Board and batten installation done by the book in a dry climate can still fail early in a marine one, because the failure modes are different. A crew that regularly works homes in and around Ferndale has already seen which wall orientations take the worst of the driving rain, which older homes tend to have moisture issues hiding under previous siding, and what it actually takes for a batten joint to hold up through a full Whatcom County winter. That kind of pattern recognition doesn't come from a manufacturer's install manual alone — it comes from doing the work in this specific weather, on this specific coastline, repeatedly.
Before hiring anyone for board and batten work in this area, it's worth asking a few direct questions:
- Do you install a rainscreen/drainage gap behind board and batten, or panels direct-to-sheathing?
- What fastener type and coating do you use, given the salt air exposure here?
- How do you flash horizontal joints and window/door penetrations on a vertical siding profile?
- Will you inspect and repair sheathing if you find moisture damage during tear-off, or just cover it?
- What warranty applies to the material, the finish, and your labor separately?
A contractor who can answer those clearly, without hedging, is one who actually understands what board and batten needs in this climate — not just how to nail boards to a wall.
If you're weighing board and batten siding for a home in the Ferndale area, we're glad to take a look and walk you through what your specific walls need. The estimate is free, there's no pressure, and you'll get a straight answer about what the job actually involves — just fill out the form below.