Blaine Siding Composite Decking Built for Cherry Point's Weather
Cherry Point sits close enough to the water that homes here take on a different kind of weather beating than you'd see a few miles inland in Blaine. Salt-laden air off the Strait, wind-driven rain that gets up under fascia and railings, and a moss season that can run half the year all work against an outdoor deck. Composite decking has become the go-to answer for homeowners in this stretch of Whatcom County who are tired of refinishing wood every spring only to watch it gray, splinter, or grow moss again by fall.
This page is about composite decking specifically for Cherry Point properties — what the local climate demands from the material and the installation, what a correct job actually involves, and why the details matter more here than they would in a drier part of the state.
What Cherry Point's Climate Does to a Deck
Salt Air
Airborne salt doesn't just affect boats and metal railings — it accelerates the breakdown of fasteners, hinges, and any exposed hardware on a deck. Over years, untreated or low-grade fasteners corrode, staining the decking around them and eventually weakening the connection. It also settles into wood grain and porous surfaces, which is part of why bare wood decks near the water need more frequent sealing than the same deck built inland.
Driving Rain
Storms coming off the water don't fall straight down — they come in sideways. That means water gets pushed into gaps, under rail posts, behind fascia boards, and into ledger connections that a calmer rain would never reach. A deck built without attention to flashing and drainage in this kind of exposure will show rot and staining years before one built with those details handled correctly.
Moss and Prolonged Dampness
Whatcom County's long wet season means decking surfaces can stay damp for days at a stretch, especially in shaded or north-facing spots. That dampness is exactly what moss and algae need to take hold. On wood, moss retains moisture against the board and speeds up decay. On lower-grade composite products, the same conditions can lead to surface staining and a slick, slippery walking surface if the boards aren't graded or capped well.
Why Composite Makes Sense Here
Composite decking isn't automatically the right answer everywhere, but in a salt-air, high-moisture environment like Cherry Point, it solves several problems at once. Modern capped composite boards have a shell that resists moisture absorption far better than raw wood, which means less swelling, cupping, and splintering over time. They don't need annual staining or sealing, which matters when the weather window for outdoor maintenance work is already short here. And a quality composite surface resists the kind of mold and algae staining that plagues shaded, damp decks, though it still needs periodic cleaning — nothing installed outdoors in this climate is maintenance-free.
We're not going to tell you wood decking is a bad product — it isn't, and plenty of homeowners still prefer the look and cost of it. But for a deck exposed to salt air and driving rain with limited upkeep time, composite is the more honest long-term recommendation, and it's what we install most often for Cherry Point homes.
Composite vs. Other Decking Materials
| Factor | Pressure-Treated Wood | Composite (Capped) | PVC |
|---|---|---|---|
| Upfront cost | Lowest | Mid to upper-mid | Highest |
| Salt air resistance | Poor without ongoing sealing | Good | Very good |
| Moss/algae resistance | Poor, needs regular cleaning | Good, cleaning still needed | Good |
| Annual maintenance | Sanding, sealing, staining | Occasional washing | Occasional washing |
| Typical lifespan | 10–15 years with upkeep | 25–30+ years | 25–30+ years |
| Feel underfoot in heat | Natural, variable | Can run warm in direct sun | Can run warm in direct sun |
PVC decking is fully synthetic and edges out composite slightly on moisture resistance, but it costs more and some homeowners find the appearance less natural. Composite sits in the middle — a real upgrade over wood for this climate without the top-end price tag of PVC. Which one makes sense for your project depends on budget, sun exposure, and how the deck will be used, and we'll walk through that honestly during a site visit rather than pushing whatever has the best margin.
What a Correct Composite Deck Install Involves
Composite boards are only as good as what's underneath them. A lot of deck problems we get called out to fix aren't the decking material's fault — they're installation shortcuts. For Cherry Point specifically, we pay close attention to:
- Substructure grade and spacing — joists sized and spaced correctly for the composite product being used, since composite has different span requirements than wood.
- Joist protection — flashing tape over the tops of joists so trapped moisture from driving rain doesn't rot the framing underneath boards that look fine on the surface.
- Ledger board flashing — proper flashing where the deck attaches to the house, which is the single most common point of hidden water damage on coastal decks.
- Fastener quality — corrosion-resistant, marine-grade fasteners and hidden fastener systems rated for coastal exposure, not standard hardware that will streak and weaken over a few salt-air seasons.
- Drainage and airflow — proper gapping between boards and clearance underneath the deck so it can dry out between storms instead of staying damp and feeding moss growth.
- Railing post attachment — solid blocking and correct fastening at every post, since wind-driven rain finds its way into loose post connections first.
None of this is visible once the deck is finished, which is exactly why it matters who does the work. A deck can look identical on day one whether it was built to hold up for 25 years or five.
Our Process
1. On-Site Assessment
We walk the property, look at sun and wind exposure, drainage patterns, and — if you're replacing an existing deck — the condition of the ledger and any framing we can access. This tells us what's actually needed, not just what looks needed from the driveway.
2. Straight Talk on Options
We'll go over composite board tiers, railing options, and fastening systems that fit your budget and how exposed the deck is. If a lower-cost option is genuinely fine for your situation, we'll say so.
3. Permitting and Prep
Deck work in Whatcom County often requires a permit depending on size, height, and attachment to the structure. We handle that process and make sure the build meets current code, including guard and stair requirements.
4. Build
Substructure first, with all the moisture protection details above handled before a single composite board goes down. Then decking, fascia, and railing installed to the manufacturer's spec, since composite installed off-spec can void the product warranty.
5. Walkthrough and Cleanup
We walk the finished deck with you, cover basic care, and clean the site before we leave.
Keeping a Composite Deck Looking Right in This Climate
Composite is low-maintenance, not no-maintenance. A simple seasonal routine keeps a Cherry Point deck performing the way it should:
- Rinse or wash the surface a few times a year to clear salt residue and organic buildup before it stains.
- Sweep off fallen leaves and debris promptly, especially in shaded areas where moss gets a foothold fastest.
- Check that gaps between boards stay clear so water keeps draining instead of pooling.
- Inspect railing posts and fasteners annually for any looseness, which can signal a moisture issue underneath.
- Trim back vegetation that keeps sections of the deck shaded and damp longer than the rest.
- Avoid pressure-washing at high pressure directly into board seams, which can force water where it shouldn't go.
Why a Local Crew Matters for This Job
Decking contractors who mostly work drier, inland areas don't always build with salt air and driving rain in mind by default — it's not part of their everyday conditions. Working regularly in and around Blaine and Whatcom County means we've seen how decks in this specific exposure actually fail over time, not just how they're built in a manual. That shows up in fastener choice, flashing details, and where we tell a homeowner it's worth spending a little more versus where it isn't. It also means we know the local permitting process and inspection expectations, so the build doesn't stall waiting on paperwork we should have handled up front.
Get a Straight Estimate
If you're planning a new composite deck or replacing a tired wood deck in Cherry Point, we're happy to come take a look and give you an honest read on what your project needs. There's no pressure and no obligation — just a straightforward assessment and a clear estimate using the form below.