Anacortes Exterior Building a Deck That Actually Holds Up on March Point
March Point sits right up against the water, and that changes what a deck has to deal with day to day. A deck built the same way you'd build one twenty miles inland, away from Fidalgo Bay, will show its age faster here — soft spots in the decking, rust streaks around fasteners, green film that comes back within weeks of cleaning it off. None of that is inevitable. It's a function of material choices and building details that either account for the local exposure or don't.
We build and repair decks throughout the Anacortes area, and March Point properties get a specific set of considerations from us before we ever cut a board. This page walks through what those are, what a correctly built deck looks like out here, and how our process works if you're planning a new deck or replacing one that's past its useful life.
What Salt Air, Rain, and Moss Actually Do to a Deck
Salt Air and Corrosion
Homes close to the water pick up airborne salt that settles on every exposed surface, including your deck's hardware. Standard zinc-coated fasteners and connectors corrode faster in this environment than they would a few miles inland. That corrosion isn't just cosmetic — a fastener that rusts through loses its holding strength, and a corroding joist hanger is a structural problem, not a maintenance nuisance. Railings and any exposed metal brackets show the effect first, usually as rust streaking down the face of the decking below them.
Driving Rain
Skagit County gets a lot of rain, and the wind off the bay often drives it sideways rather than straight down. That matters for a deck because water gets pushed into joints, under ledger board flashing, and behind railing posts that would stay dry in a calmer climate. Any gap in flashing or sealant that would be a minor issue elsewhere becomes a real path for water intrusion here, especially where the deck attaches to the house.
Moss and Algae
Damp, shaded, salt-humid air is exactly what moss and algae need to establish themselves, and Anacortes has a long stretch of the year that fits that description. Moss holds moisture against the decking surface long after the rain has stopped, which accelerates rot in wood products and can make composite and even some capped products slippery and dull-looking faster than in drier climates. A deck that never fully dries out between rain events is a deck that's constantly feeding whatever's trying to grow on it.
Choosing Materials for This Climate
There's no single "best" decking material — the right choice depends on how much upkeep you want to do, your budget, and how close you are to the water. Here's how the common options actually perform under March Point conditions:
| Material | How It Handles Salt Air & Rain | Moss Resistance | Upkeep |
|---|---|---|---|
| Pressure-treated lumber | Treatment resists rot but end cuts and fastener holes need re-sealing | Needs regular cleaning or moss returns quickly | Annual sealing/staining recommended |
| Cedar | Naturally rot-resistant but will gray and can cup if not sealed | Moderate — benefits from periodic cleaning | Sealing every 1-2 years |
| Composite (capped) | Won't rot or absorb moisture, handles salt air well | Surface can still host algae film; cleans off easily | Periodic washing, no sealing/staining |
| Tropical hardwoods | Very dense, naturally weather-resistant | Good, but surface can still get slick when mossy | Oiling to maintain color; low structural upkeep |
For a lot of March Point homeowners, capped composite decking ends up being the practical choice specifically because of the salt air and moss exposure — it doesn't give rot or corrosion the foothold that raw wood can. That said, we've built plenty of well-detailed cedar and hardwood decks out here that hold up fine when the framing and finishing are done right. The material matters less than whether it's the right material for how you plan to maintain it.
Fasteners and Hardware
Whatever decking material you choose, the hardware underneath it deserves at least as much thought. For anything within a mile or two of the bay, we default to stainless steel or heavily coated, marine-rated fasteners and structural connectors rather than standard exterior-grade hardware. It costs more up front. It's also the single biggest factor in whether your deck's frame is still sound in fifteen years versus showing rust-jacking and loosening connections in five.
Framing and Drainage Details That Matter Here
A deck's long-term health is decided mostly in the framing stage, before any decking boards go down. On a March Point build, we pay particular attention to:
- Ledger flashing: Where the deck attaches to the house, proper flashing — installed in the right order with the house's existing water barrier — keeps driving rain from working its way into the rim joist and wall framing behind it.
- Joist protection: Tape or coating on the tops of joists sheds water instead of letting it pool and soak into end grain, which is where rot typically starts.
- Post base connections: Post bases that hold the post above the concrete, rather than embedding it, keep the end grain out of standing water and reduce corrosion contact with the hardware.
- Deck slope: A slight slope away from the house helps the surface actually shed the volume of rain this area gets instead of holding puddles that feed moss growth.
- Airflow underneath: Adequate clearance and ventilation below the deck surface lets it dry out between storms instead of staying damp continuously through the wet months.
None of these details are unusual or exotic — they're standard good practice. What's different on a bay-adjacent property is that skipping any one of them shows up as a problem much sooner than it would on a drier, more sheltered lot.
Design Considerations Specific to March Point Properties
Waterfront and near-waterfront lots often come with view priorities, wind exposure, and lot grading that shape deck design more than they would on a typical inland lot. A few things we weigh with homeowners here:
Wind Exposure
Open exposure to the bay means more wind loading on railings and any overhead structure like a pergola. We size posts, railing attachment points, and any roof or cover framing with that wind exposure in mind rather than using the minimum the code allows.
Grading and Height
Many March Point lots have a grade change toward the water, which affects footing depth, stair design, and sometimes whether a permit review needs to account for setback or height rules tied to the shoreline. We handle that as part of planning rather than surprising you with it mid-project.
Privacy and Wind Screening
Because these lots are often more exposed than a fenced inland backyard, homeowners frequently want partial wind or privacy screening built into the railing design. We can build that in from the start rather than bolting something on afterward.
Our Process for a March Point Deck Project
Whether it's new construction or replacing a deck that's reached the end of its life, our process stays the same:
- On-site assessment: We look at the existing structure (if there is one), the grade, sun/wind exposure, and how close you are to the water, since that affects material and hardware recommendations.
- Design and material selection: We walk through the material comparison above with you in the context of your specific budget and maintenance preferences, not a generic recommendation.
- Permitting: Decks attached to the home or above a certain height typically require a permit. We handle that process rather than leaving it to you.
- Framing: This is where the flashing, fastener grade, joist protection, and post base details described above get built in — the part of the job that isn't visible once it's finished but determines how long the deck lasts.
- Decking, railing, and finish work: Installed to the manufacturer's specifications for whatever material you've chosen, since improper spacing or fastening is a common cause of early warranty issues on composite products especially.
- Final walkthrough: We go over basic care — cleaning frequency, what to watch for, and anything specific to your material — before we consider the job done.
Maintaining a Deck in a Moss-Heavy Climate
Whatever material you choose, a few habits go a long way toward keeping a March Point deck looking and performing the way it should:
- Sweep debris off the surface regularly, especially in fall — trapped leaves and needles hold moisture against the decking and are one of the fastest ways moss gets established.
- Rinse or wash the deck on a schedule rather than waiting until moss is visibly established; it's far easier to prevent than to remove once it's taken hold.
- Check railing posts and any metal hardware periodically for early rust staining — catching it early is a cleaning job, catching it late can be a repair job.
- Keep gutters and downspouts near the deck clear so runoff isn't dumping extra water onto or under the deck surface.
- If you have a wood deck, reapply sealant or stain on the schedule appropriate to your product — in this climate, stretching that interval tends to catch up with you faster than in a drier area.
Why a Crew That Already Works March Point Makes a Difference
A lot of deck problems we get called out to repair trace back to a build that used standard practices without adjusting for the site. That's an easy mistake for a crew that doesn't regularly work this close to the water — the framing looks fine on install day and the issues don't show up for a year or two. Working in and around Anacortes and Skagit County regularly means we're not guessing at how salt air, wind exposure, and the local rain pattern affect a build; we're building around it as a matter of course, from fastener choice on down.
That local familiarity also carries over to permitting and any shoreline-related review that can apply to waterfront and near-waterfront lots, since we're used to working through that process with the local jurisdiction rather than encountering it for the first time.
Getting Started
If you're planning a new deck for a March Point property, or you're dealing with an existing deck that's showing rust, soft spots, or moss that keeps coming back no matter how often you clean it, we're happy to take a look and give you an honest read on what's going on and what it would take to fix it right. There's no pressure and no cost to get an estimate — just fill out the form below and we'll set up a time to come by.