Building Decks for March Point's Particular Exposure
March Point sits out on the water, which means homes here catch wind and salt spray that inland Anacortes properties rarely see. Add in the long stretch of wet months that Skagit County gets every year, and you've got a recipe for deck problems that show up faster than most homeowners expect: soft spots at the ledger board, corroded fasteners, slick moss buildup on walking surfaces, and finish failure on anything that wasn't detailed correctly at installation. A deck built the same way you'd build one in a dry inland climate will not hold up the same way out here. We've worked on decks throughout this area long enough to know which shortcuts fail first, and we build accordingly from the start.
What Salt Air Actually Does to a Deck
Salt-laden air accelerates corrosion on anything metal — fasteners, joist hangers, railing hardware, even some flashing metals. Standard coated deck screws that would last for years in a drier, inland yard can start rusting and staining the decking within a season or two out near the water. That rust isn't just cosmetic; once a fastener starts to corrode, its holding strength drops, and a deck is only as strong as the connections holding it together.
What Driving Rain and Moss Season Do
Anacortes gets long stretches of steady, wind-driven rain, and that rain doesn't just fall straight down — it gets pushed sideways into ledger connections, under poorly flashed rim joists, and into any gap in the decking that wasn't sealed or spaced correctly. Combine that moisture with shade from trees or the house itself, and you get moss and algae growth on the deck surface that makes stairs and walkways genuinely slippery for a good part of the year, not just an occasional annoyance.

What a Correctly Built Deck Needs to Have
A deck that's going to hold up on March Point isn't about upgrading every component to the most expensive option available — it's about getting the details right in the places where moisture and salt air do their damage. That comes down to a handful of specific things:
- Ledger board flashing that actually sheds water away from the house rim joist, not just a bead of caulk behind the board
- Stainless steel or heavily coated, marine-rated fasteners and joist hangers in any location exposed to spray or standing moisture
- Proper board spacing and airflow underneath the deck so wet wood can actually dry out between storms
- A footing and post layout that accounts for the actual soil and drainage conditions on the lot, not a generic span table applied blindly
- Decking material chosen with this specific site's sun, shade, and moisture exposure in mind
Decking Material Options for This Climate
There's no single "best" decking material for every March Point property — the right choice depends on how much shade the deck gets, how close it is to the water, and how much maintenance the homeowner actually wants to keep up with. Here's how the common options compare under our conditions:
| Material | How It Handles Salt Air & Rain | Maintenance | Typical Lifespan Here |
|---|---|---|---|
| Pressure-treated wood | Needs regular sealing to resist moisture and moss; can cup or split if neglected | Annual cleaning and re-sealing recommended | 10-15 years with upkeep |
| Cedar | Naturally moisture- and rot-resistant, but still needs finish maintenance in salt air | Periodic cleaning and refinishing | 15-20 years with upkeep |
| Composite decking | Doesn't absorb moisture or rot; still needs cleaning to prevent moss/algae film | Low — occasional washing | 25-30 years, per manufacturer warranty |
| PVC/capped polymer | Fully sealed surface, best resistance to moss growth and moisture damage | Lowest — occasional washing | 25-30+ years, per manufacturer warranty |
We'll walk through these trade-offs honestly during an estimate. Composite and PVC decking cost more up front but ask less of the homeowner over time, which matters a lot in a climate where moss and moisture are a year-round consideration rather than a seasonal one. Wood decking isn't a bad choice — it's a different maintenance commitment, and we'll tell you straight what that commitment looks like before you decide.
The Hidden Work: Ledger, Flashing, and Fasteners
The Ledger Connection
The ledger board — where the deck attaches to the house — is the single most common failure point on decks anywhere, and salt air and driving rain make it worse here. Water that gets behind an improperly flashed ledger doesn't just rot the ledger itself; it can work its way into the house's rim joist and framing. We flash this connection with proper step flashing and water-resistant barrier material, not just sealant, because sealant alone degrades and fails over time while flashing sheds water by design.
Fastener and Hardware Selection
Every joist hanger, post base, and structural screw on a deck we build in this area is rated for exterior, corrosion-prone exposure. On decks with more direct exposure to salt spray, we step up to stainless steel hardware in the connections that matter most structurally. It costs more than standard coated fasteners, but replacing a rusted-through joist hanger years down the road costs a lot more than the difference in materials today.
Our Process, Start to Finish
- On-site assessment — we look at sun/shade exposure, drainage, soil conditions, and how exposed the location is to wind-driven rain and salt spray before recommending materials.
- Honest material and design conversation — we walk through the trade-offs in the table above based on your specific site, not a one-size-fits-all pitch.
- Permitting — decks typically require a permit through the local building department; we handle that process so you don't have to chase it down yourself.
- Footings and framing — built to span tables and local code, with attention to drainage and airflow underneath.
- Ledger flashing and structural connections — the step most likely to be rushed elsewhere; we don't rush it.
- Decking, railing, and stairs — installed with the fastening and spacing details appropriate to the material and this climate.
- Final walkthrough — we go over basic maintenance expectations for the specific material installed.
Railings, Stairs, and Everyday Safety
Stairs and railings see more direct wear than the deck surface itself — hands on the rail, feet on the treads, and in this climate, moss and algae buildup that makes both slicker than homeowners often realize until someone slips. We detail stair stringers and railing posts with the same corrosion-resistant hardware as the rest of the structure, and we talk through tread material choices with grip and moisture-shedding in mind, not just appearance. Skagit County's building code has specific requirements for railing height and baluster spacing, and we build to those requirements as a matter of course, not an afterthought.
Permits and Local Code Considerations
Deck construction in Anacortes generally requires a building permit, with inspections at the footing and framing stages before decking goes down. Requirements can vary depending on deck height, size, and proximity to property lines, so we confirm the specifics for your property before design work goes final. Handling this correctly matters beyond just legality — an inspected, permitted deck is built to a verified structural standard, and it avoids complications if you ever sell the home and a buyer's inspector asks for permit history.
Keeping a March Point Deck in Good Shape
Whatever material you choose, a little regular attention goes a long way in this climate. A basic seasonal routine:
- Sweep debris off the deck surface regularly, especially in fall, so trapped leaves don't hold moisture against the decking
- Wash the surface periodically to remove early moss and algae growth before it gets established and slick
- Check railings and stair connections once or twice a year for any looseness
- Inspect fasteners for early rust staining, which is easier and cheaper to address early than after it spreads
- Re-seal wood decking on the manufacturer's or installer's recommended schedule — don't wait until it looks obviously weathered
- Keep an eye on the area where the deck meets the house for any signs of water staining or soft wood
Why a Crew That Already Works March Point Matters
General deck-building knowledge only gets you so far in a spot like this. A crew that's worked other decks on March Point and around Anacortes already knows which fastener grades hold up, which flashing details actually keep water out in wind-driven rain, and which decking materials perform the way they're supposed to once salt air and moss season set in year after year. That's the kind of judgment that shows up years later, not on the day the deck is finished — which is exactly when it matters most to a homeowner.
If you're planning a new deck or replacing one that's showing its age out on March Point, we're happy to come take a look and give you a straightforward, no-pressure estimate. Use the form below to get in touch.
Anacortes Siding