Anacortes Decking Built for the March Point Waterfront Environment
March Point sits close enough to the water that every outdoor structure on the property deals with salt-laden air, near-constant damp, and a moss season that can run from fall through spring. A deck out here isn't just a place to put a grill — it's a structure that has to shed water fast, resist corrosion in every fastener, and stay safe underfoot when it's wet, which in Skagit County is most of the year. Composite decking has become the default choice for homeowners in this area because it handles that combination better than most wood products, but "composite" covers a wide range of quality, and installation matters as much as the material.
We work in and around Anacortes regularly, and March Point's exposure is a step up from a typical inland lot. Wind off the water pushes rain sideways into ledger boards and rim joists, salt air accelerates corrosion on cheap fasteners, and shaded or north-facing sections of a deck can stay damp long enough to grow moss and algae between cleanings. None of that is a reason to avoid decking — it's a reason to build it correctly the first time.
Why Composite Makes Sense in This Climate
Wood decking isn't a bad product, but it asks for a level of upkeep — annual sealing, sanding, spot-replacing boards that cup or split — that a lot of homeowners don't want to keep up with in a climate that barely gives paint and stain time to cure between rain events. Composite decking is manufactured wood fiber and plastic, and depending on the product line, it's either fully encapsulated (capped) or exposed on the surface (uncapped). The appeal for a March Point property is straightforward:
- It doesn't absorb water the way solid wood does, so it resists the swelling, splintering, and rot that damp coastal air accelerates
- It doesn't need annual staining or sealing — a wash-down a couple of times a year handles most maintenance
- Color and texture are manufactured in, so it doesn't gray, silver, or fade unevenly the way untreated wood does under intermittent sun and near-constant moisture
- It won't splinter, which matters on a deck that's damp and slick more often than it's bone dry
The trade-off is upfront cost — composite boards cost more per square foot than pressure-treated lumber — and the fact that composite still needs a properly built, well-ventilated substructure underneath it. Composite doesn't fix a bad frame; it just hides it until moisture finds a way in anyway.
Composite vs. Other Decking Materials
| Material | Moisture Behavior | Maintenance | Typical Lifespan |
|---|---|---|---|
| Pressure-treated wood | Absorbs water, prone to cupping and splitting in wet climates | Annual cleaning and sealing recommended | 10-15 years before major repair |
| Cedar or other natural wood | Attractive but softer, more sensitive to standing moisture | Regular sealing and more frequent board replacement | 10-15 years, often less on shaded sections |
| Uncapped composite | Resists rot but surface can absorb moisture and stain over time | Periodic cleaning to prevent mold/mildew staining | 15-25 years depending on product |
| Capped composite / PVC | Fully sealed surface, best resistance to moisture and staining | Occasional wash-down, minimal upkeep | 25+ years, longest manufacturer warranties |
What a Correct Installation Actually Involves
The composite boards are the part homeowners see, but most of the problems we get called to fix started underneath them. A deck installed without accounting for this area's rainfall and humidity will eventually show it — soft spots, sagging boards, or fastener corrosion — even with premium decking on top.
The substructure
Joists and framing need to be rated for ground contact or coastal exposure, spaced correctly for the specific composite product being used (composite spans differently than lumber and manufacturers publish exact joist-spacing requirements), and set up so water doesn't pool against the house. Ledger board attachment and flashing at the house connection is one of the most common failure points we see on older decks in this area — if water gets behind the ledger, it doesn't dry out quickly in a marine climate, and rot spreads into the rim joist and framing before anyone notices from the surface.
Fasteners and hardware
Salt air is hard on metal. We use fasteners and structural hardware rated for coastal or high-corrosion environments, not standard interior-grade hardware that looks fine for a year or two and then starts staining the decking or failing where it counts.
Ventilation and drainage underneath
A low deck with poor airflow underneath traps moisture against the joists year-round. Depending on deck height and grading, that can mean adjusting the substructure design, adding gaps or vents, or grading the ground beneath the deck so water doesn't sit there through the wet months.
Board spacing and fastening
Composite boards expand and contract with temperature more than people expect, and gapping has to account for that plus drainage — tight gaps hold water and debris, which is exactly what feeds moss and algae growth in a shaded, damp yard.
Our Process for a March Point Deck
- Site assessment — we look at sun exposure, wind direction, drainage patterns, and how close the deck area sits to grade or water, since that changes framing and hardware decisions
- Existing structure evaluation — if there's a deck being replaced, we check the ledger, framing, and any hidden rot before quoting new decking over old problems
- Framing and substructure — built to current code with corrosion-resistant hardware and proper ledger flashing
- Decking installation — board layout, gapping, and fastening specific to the composite product chosen
- Finish details — fascia, stair treads, railing, and edge trim finished to match, with attention to any spots where water tends to collect
- Walkthrough — we go over basic care so the deck actually gets the lifespan it's built for
Living With Composite Decking in a Marine Climate
Composite is low-maintenance, not no-maintenance. In this part of Skagit County, the two things that actually affect a composite deck's appearance over time are moss/algae growth in shaded or damp areas and surface debris (needles, leaves, pollen) that holds moisture against the boards if it's never cleared off. Neither is a defect in the product — it's just what happens outdoors here.
- Sweep or blow off debris regularly, especially in fall and through moss season
- Wash the deck a couple of times a year with a deck cleaner or mild soap and water — a pressure washer on a low setting works, but high pressure can damage board surfaces
- Keep gutters and downspouts near the deck clear so runoff isn't dumping directly onto or under it
- Check railing posts and stair connections annually for movement, since that's usually the first sign of a framing issue, not a decking issue
Cost Factors for a March Point Composite Deck
Every deck is priced around its own footprint and site conditions, so we won't put a number on it without seeing the property, but these are the factors that move the price up or down:
| Factor | Why It Matters |
|---|---|
| Deck size and shape | More square footage and more corners/angles increase material and labor |
| Height off grade | Taller decks need more substructure, stairs, and often railing |
| Existing structure condition | Reusing sound framing costs less than a full tear-out and rebuild |
| Composite product tier | Uncapped composite costs less than capped composite or PVC-based boards |
| Railing and stair details | Composite or metal railing systems add cost over basic wood rail |
| Site access | Waterfront or sloped lots can add labor for material staging and equipment access |
Why It Matters That We Already Work in March Point
A crew that mostly works inland doesn't always think about the things that matter on a shoreline-adjacent property — how much more corrosion-resistant hardware needs to be, how wind-driven rain changes flashing details, or how shaded, low-airflow sections of a yard grow moss faster than the rest of the property. We work throughout Anacortes and the surrounding Skagit County area, and we build decks the same way for every property, but the exposure March Point homes deal with is exactly why we don't cut corners on flashing, fasteners, or ventilation to save a little on labor. It costs more to fix a rotted ledger board or a corroded railing connection three years in than to build it right the first time.
Checklist Before You Hire
- Ask what fastener and hardware grade they use — it should be rated for coastal or high-moisture exposure, not standard interior-grade
- Ask how they handle ledger board flashing at the house connection
- Ask whether they're pricing based on the actual joist-spacing requirements for the specific composite product, not a generic spacing
- Ask how they evaluate and disclose the condition of any existing substructure before quoting
- Get a written estimate that separates substructure, decking material, and railing/stairs so you can see where the cost actually goes
If you're planning a new deck or replacing an aging one on your March Point property, we're happy to come take a look and walk through your options with no pressure to commit. Fill out the form below and we'll get in touch to schedule a free estimate.