What's the difference between board and batten and standard lap siding, and why does it show up so often on islands like Guemes?

Board and batten uses vertical panels with narrow strips covering the seams, instead of horizontal overlapping boards. The vertical lines shed wind-driven rain straight down the wall rather than letting it collect along horizontal laps, which is part of why it's a popular choice on wetter, wind-exposed properties like those on Guemes Island. It does have more seams to detail correctly than lap siding, so installation quality matters more.

What should I ask a contractor before hiring them for a Guemes Island siding job?

Ask whether they've worked on the island before and how they plan around the ferry schedule, since that affects both cost and timeline. Ask what weather barrier, rainscreen, and flashing details they use behind the siding, not just what the finished product looks like. And get their warranty terms in writing, since verbal promises don't help years down the road.

Why won't you install vinyl or engineered wood board and batten?

We standardized on James Hardie fiber cement because we've seen how differently these materials perform once real marine weather goes to work on them over years, not just months. Vinyl and engineered wood can look fine at installation, but the maintenance burden and moisture risks they carry over time didn't match what we're willing to stand behind. We'd rather install one system correctly than offer several and let the homeowner absorb the risk of the wrong pick.

What's the actual difference between HardiePanel vertical siding and traditional board and batten boards?

Traditional board and batten uses individual solid boards with separate battens nailed over the seams, creating more wood-to-wood joints that can trap moisture. HardiePanel vertical siding is a single fiber-cement panel with HardieTrim battens installed over it, so there are fewer raw seams exposed to the weather. The look is the same, but the panel system gives water fewer places to get into the wall assembly.

Does the ferry crossing to Guemes Island change the cost or timeline of a siding project?

It affects the schedule more than the base cost, since crew time and material deliveries have to work around ferry sailings rather than just driving straight to the site. A contractor who plans deliveries and crew days around the ferry in advance keeps a project on schedule; one who doesn't plan for it can end up with delays. We build that planning into every Guemes Island estimate from the start.

Board & Batten Siding for Guemes Island Homes

Board & Batten Siding Built for a Guemes Island Address

Guemes Island sits just across the water from Anacortes, reachable only by a short ferry ride, and that isolation shapes everything about how a home should be built and maintained out there. Wide-open exposure to the Salish Sea means salt-laden air moves across the island constantly, driving rain comes in sideways off the water during winter storms, and the shade from evergreens combined with a long, persistent Pacific Northwest moss season keeps exterior surfaces working overtime almost year-round. Board and batten siding, done right, holds up to that combination better than most siding styles, but only if the materials and the installation are matched to what the island actually throws at a house.

This page focuses on one thing: board and batten siding, installed correctly, for homes on Guemes Island. Not a general siding overview, not a sales pitch for a dozen products, just what this specific siding style needs to hold up out there, how our process works, and why the crew doing the work matters as much as the material itself.

Why Board & Batten Is a Good Fit for Skagit County's Island Homes

Board and batten has a clean, vertical look that suits the mix of cabins, waterfront homes, and newer builds you find on Guemes Island. Beyond looks, the vertical orientation has a practical advantage in a place with this much wind-driven rain: water sheds straight down the face of the panel instead of collecting along horizontal laps, which matters when storms are pushing rain sideways instead of straight down. It also reads as a cleaner, more contemporary look than lap siding, which is part of why it shows up so often on newer builds and remodels around Anacortes.

That said, the style also has more seams — the battens themselves — than a plain lap or panel siding. Every one of those seams is a place water can get behind the cladding if it isn't detailed correctly. On a normal inland lot, a sloppy batten job might go unnoticed for years. On Guemes Island, with salt air accelerating corrosion of fasteners and constant moisture keeping wood assemblies damp, mistakes show up faster. That's the tradeoff homeowners need to understand before choosing this look: it rewards a correct installation and punishes a rushed one.

What Correct Board & Batten Installation Actually Requires

A drainage plane and rainscreen gap

Behind the boards and battens there has to be a weather-resistive barrier and, on an exposure like this, a rainscreen gap — a small air space created with vertical furring strips — so any moisture that does get past the cladding can drain and dry out instead of sitting against the sheathing. Skipping this step is one of the most common shortcuts in board and batten work, and it's the one most likely to cause hidden rot behind the siding on a wet, wind-exposed island lot.

Fastening that accounts for salt air

Standard fasteners corrode faster in salt-air environments. Corrosion-resistant, manufacturer-approved fasteners driven at the correct spacing and depth are not optional here — a fastener that rusts and loses its grip years before the siding itself wears out turns into a maintenance problem homeowners shouldn't have to deal with.

Flashing at every horizontal break

Window and door heads, roof-to-wall transitions, and any horizontal trim need proper flashing and kick-out details. Board and batten's vertical lines can make it tempting to run boards straight past these transitions — that's exactly where driving rain finds its way in.

Corner and trim details

Outside corners, inside corners, and the points where siding meets window and door trim all need consistent, weather-tight detailing. A batten job that looks sharp from the street can still fail at these transitions if the corners weren't flashed and sealed with the same care as the field of the wall.

Batten spacing and sealant

Battens need consistent spacing over the panel joints, with the right gap and a quality, flexible sealant at the joints that can move with seasonal expansion without cracking. Cheap or inconsistent caulking is one of the first things to fail in a marine climate.

The James Hardie Board & Batten System We Install

We install James Hardie fiber cement exclusively, and for board and batten that means HardiePanel vertical siding paired with HardieTrim battens — not plywood, not engineered wood, not vinyl board and batten panels. A few reasons this matters specifically for a Guemes Island property:

Non-combustible fiber cement — doesn't feed rot the way wood-based sidings can once moisture gets behind them
HZ5 climate-engineered formulation — Hardie's HZ5 product line is engineered for wetter, harsher climates, which fits Skagit County's marine weather better than a standard-climate product
Factory-applied ColorPlus finish — a baked-on finish that resists the salt-air fading and moisture-driven paint failure that plagues field-painted wood siding on exposed island lots
Consistent, engineered dimensions — panels and battens that don't cup, warp, or swell the way solid wood battens can when they take on moisture in a shaded, damp yard

We won't put plywood-based panel siding, primed wood battens, or vinyl board and batten on a home in this environment. Each of those has a place somewhere, but on an island where the fastener and finish sit under near-constant humidity, wind, and salt exposure, we've seen enough of the long-term maintenance burden to standardize on one system and install it well rather than offer several and let the client absorb the risk of the wrong choice.

Comparing Board & Batten Material Options for This Climate

Material	Moisture Behavior in Marine Air	Maintenance Over Time	Typical Lifespan Here
Plywood/T1-11 panel	Absorbs moisture at edges and seams; prone to delamination	Frequent recaulking and repainting	Shortest of the common options
Solid wood battens (cedar/primed spruce)	Swells, cups, and checks with repeated wet/dry cycles	Regular refinishing and batten replacement	Moderate, heavily dependent on upkeep
Vinyl board and batten	Doesn't rot, but can warp or crack in wind and temperature swings; seams can let moisture behind it unnoticed	Low visible upkeep, but hidden moisture issues aren't obvious until damage is advanced	Variable, hard to inspect for hidden issues
James Hardie fiber cement (HZ5)	Engineered for wet climates; factory finish resists moisture-driven failure	Occasional wash and joint inspection	Longest of the options, backed by a strong transferable warranty

How Ferry Access Shapes the Way We Plan a Guemes Island Job

Working on Guemes Island isn't the same as working a mainland Anacortes job. Every trip — for the initial estimate, the material delivery, the crew, and any follow-up — depends on the ferry schedule. A contractor who doesn't plan around that ends up wasting your money on crew time spent waiting for a boat, or worse, cutting corners to avoid an extra crossing.

We plan Guemes Island projects around the ferry from the start: staging materials so a full delivery makes the crossing in as few trips as possible, scheduling crew days to make full use of the time once they're on the island, and sequencing the job so we're not sending someone back and forth for a forgotten tool or a small fix. That planning isn't glamorous, but it's the difference between a project that runs on schedule and one that drags out for weeks because of avoidable ferry trips.

What Guemes Island Homeowners Should Expect for Upkeep

Even the right siding system needs some homeowner attention in a climate with this much moisture and this long a moss season. Board and batten siding on Guemes Island should be checked periodically for the issues that show up first out here:

Moss or algae buildup on north-facing or heavily shaded walls, which holds moisture against the surface if left to grow
Salt film buildup near the water side of the home, which is worth an occasional gentle rinse
Caulking at batten joints and trim, checked for cracking or separation after a few winters of wind and rain
Fastener heads and trim edges, watched for any early signs of corrosion or paint failure

None of this is heavy maintenance — it's closer to a once- or twice-a-year walk-around — but skipping it on an island exposure lets small issues turn into siding failures faster than they would on a sheltered inland lot.

Our Board & Batten Installation Process

Every Guemes Island board and batten job follows the same sequence, adjusted for ferry logistics but never shortcut on the details that matter:

On-site assessment of the existing walls, sheathing condition, and exposure on each elevation
Measurement and material take-off, with materials staged for efficient ferry transport
Removal of failing siding and inspection of the sheathing and framing underneath for hidden moisture damage
Installation of the weather-resistive barrier and rainscreen furring
Installation of HardiePanel vertical siding and HardieTrim battens with corrosion-resistant fasteners and correct flashing at every transition
Sealing all joints with a marine-grade, flexible sealant
Final walk-through with the homeowner before the crew leaves the island

Why Hire a Crew That Already Works Guemes Island

A crew that hasn't worked the island before will learn its lessons on your house — the ferry timing, the wind exposure on a waterfront lot, the way moisture behaves on an older island structure that may have been built or added onto without a modern drainage plane. A crew that already works Guemes Island has already absorbed those lessons somewhere else. That experience shows up in fewer surprises mid-project, a more realistic schedule from the first estimate, and a siding job that's detailed for the exposure it will actually face rather than a generic mainland installation dropped onto an island lot.

If you're weighing board and batten siding for a home on Guemes Island, we're happy to walk the property, look at what the current siding and structure are dealing with, and put together a straightforward estimate — no pressure, no upsell to a product we wouldn't put on our own homes. Use the form below to request a free estimate.