Blaine Siding Decking Built for Cherry Point, Not for a Catalog Photo
Cherry Point sits right where the Strait of Georgia weather meets Whatcom County's wet winters, and that combination is harder on outdoor decking than almost anywhere else in our service area. You're close enough to the water to get salt-laden air and wind-driven rain, and far enough into the Pacific Northwest to get a long, grey moss season that keeps every shaded surface damp for months at a time. A deck built to a generic spec sheet will show it within a couple of years — chalking, staining, soft spots at the fasteners, and a green film that never quite goes away. A deck built for this specific stretch of coastline holds its color, its footing, and its structure a lot longer.
This page is about one job in one place: composite decking installed correctly for Cherry Point homes, whether that's a waterfront property, a farmhouse set back from the shoreline, or a newer build near the industrial corridor. We're not going to cover every decking material on the market — just what actually works out here and how we build it.
What This Climate Actually Does to a Deck
Salt Air and Metal Hardware
Salt-laden air corrodes ordinary fasteners, brackets, and ledger hardware faster than inland installers usually expect. On a standard wood deck, that shows up as rust streaks bleeding through the boards and eventually as loose or failing connections at stress points. Composite decking itself doesn't corrode, but every deck is still held together with metal — joist hangers, screws, post bases, flashing — and that hardware has to be rated for coastal exposure or it becomes the weak link regardless of what's on top of it.
Driving Rain and Wind-Loaded Water
Rain near Cherry Point rarely falls straight down. Wind off the water pushes it sideways, under railings, into end grain, and against ledger boards and house connections. That matters more for the framing and flashing than for the decking surface, but it's exactly where cheap installs fail first — water finds the one seam that wasn't sealed and works on it all winter.
The Long Moss Season
Shaded decks, north-facing decks, and anything under mature trees stay damp here for a good chunk of the year. Moss and algae need moisture and organic debris to get started, and a poorly ventilated deck with tight board gaps and debris trapped underneath gives them exactly that. This is a maintenance issue more than a material-failure issue, but it's one that a correct installation makes dramatically easier to manage.
Composite vs. the Alternatives, for This Specific Climate
| Material | How it handles salt air & rain | How it handles moss season | Long-term maintenance |
|---|---|---|---|
| Wood (cedar/fir) | Needs regular sealing; end grain and fastener holes are vulnerable | Absorbs moisture, feeds moss and algae growth | Annual cleaning, periodic re-staining or sealing |
| Composite (capped) | Non-absorbent core, capped boards resist moisture intrusion | Sheds water faster; smoother cap resists moss attachment | Periodic rinsing/light cleaning, no sealing or staining |
| PVC | Fully non-absorbent, very durable in wet coastal air | Similar resistance to composite; smooth surface sheds debris well | Low maintenance, higher upfront cost |
We install capped composite decking as our standard recommendation for most Cherry Point properties because it strikes the right balance between upfront cost and how little attention it needs once it's down. We won't tell you a specific brand is bad — we'll tell you honestly that any decking product, composite or otherwise, is only as good as the substructure, flashing, and fastening underneath it. That's where most decking failures out here actually start.
What a Correct Installation Actually Involves
Substructure First
Before a single deck board goes down, the framing has to be right for wet coastal conditions: joists spaced and rated for the composite product's span requirements (composite generally needs tighter joist spacing than wood), coastal-rated fasteners and connectors, and a ledger connection that's properly flashed against the house — not just bolted and caulked. This is the part of the job you never see once it's finished, and it's the part that determines whether the deck is still solid in fifteen years.
Ventilation and Drainage Underneath
A deck that can't breathe underneath traps moisture, which speeds up moss growth on the surface and encourages rot in any wood components below (posts, beams, blocking). We build in proper clearance from grade, drainage paths so water doesn't pool under the deck, and gaps that let air move rather than sealing the underside up tight.
Board Layout and Fastening
Hidden fastener systems are worth the extra labor on a coastal job — they keep water out of screw holes, which is exactly where composite boards are most likely to show staining or swelling over time if face-screwed with exposed fasteners. Board gaps need to be set correctly for the specific product's expansion rate, wider than you'd think, because composite moves with temperature and moisture more than most homeowners expect.
Railings, Stairs, and Edge Details
Edges, stair stringers, and railing posts take the brunt of wind-driven rain. These get the same coastal-rated hardware and flashing attention as the ledger connection — it's a common shortcut to detail the field of the deck well and rush the edges, and the edges are usually where problems show up first.
Our Process for a Cherry Point Composite Deck
- On-site assessment — we look at sun/shade exposure, wind exposure relative to the water, existing framing condition, and drainage around the footprint.
- Structural plan — joist layout, fastener and hardware spec (coastal-rated), and ledger/flashing detail sized to the actual span and load, not a generic template.
- Material selection — we walk through composite options and trade-offs honestly, including where PVC might make more sense for a particularly exposed or shaded spot.
- Demo and framing — old decking and any compromised framing removed and replaced; new substructure built to spec.
- Board installation — hidden fastener system, correct gapping, attention to cut-end sealing where boards are trimmed.
- Railings and edge details — finished with the same coastal hardware standard as the structural connections.
- Final walkthrough — we go over basic care specific to your deck's sun/shade exposure so moss and debris don't get a head start.
Maintenance That Actually Matters Here
Composite decking is low-maintenance, not no-maintenance, and the difference matters most in a climate like this one. A few habits go a long way toward keeping a Cherry Point deck looking and performing the way it should:
- Sweep or blow off leaves and needles regularly, especially in fall — trapped organic debris is what actually feeds moss, not the composite itself
- Rinse the surface periodically, and give shaded sections a light scrub with a soft brush if you see early green film forming
- Keep gutters and downspouts near the deck clear so runoff isn't dumping extra water onto or under the deck surface
- Check railing and stair connections once a year for any looseness — a quick tighten now beats a bigger repair later
- Avoid pressure-washing at close range or high pressure, which can damage the cap layer on composite boards
- Keep planters and furniture feet from sitting in standing water on the deck surface for extended periods
Cost Factors for a Cherry Point Composite Deck
| Factor | Why it moves the price |
|---|---|
| Deck size and shape | Square footage and the number of angles/cuts affect material and labor |
| Height off grade | Taller decks need more substantial framing, railings, and often stairs |
| Existing structure condition | Rotted or undersized framing has to be replaced before new decking goes down |
| Board and hardware grade | Composite tiers and coastal-rated hardware cost more than standard-grade options |
| Site exposure | Wind and salt exposure near the water can justify upgraded fasteners and flashing |
| Access | Waterfront or hillside lots can add labor time for material staging and equipment access |
We don't quote off a square-footage rule of thumb alone, because two decks the same size can need very different substructure work depending on what's underneath the old one. A site visit gets you a real number.
Why It Matters That We Already Work Cherry Point
A crew that's only worked inland decks tends to under-spec hardware, under-plan for ventilation, and treat flashing as an afterthought — not because they're careless, but because it's never bitten them before. Out here, those shortcuts show up fast. Working regularly in Blaine and along Whatcom County's coastline means we already know which fastener grades hold up, how to detail a ledger connection that won't leak in driving rain, and how to lay out a deck so shaded areas don't turn into a moss farm by year two. That's not a sales pitch — it's just what building decks in salt air and long wet winters teaches you if you pay attention.
A Few Questions to Ask Any Contractor Before You Sign
- What fastener and hardware grade are you using, and is it rated for coastal exposure?
- How will the ledger board be flashed against the house?
- What joist spacing are you using, and does it match the composite manufacturer's span requirements?
- How will you handle drainage and airflow underneath the deck?
- What's the manufacturer's warranty, and does your installation method keep that warranty valid?
Let's Look at Your Deck
If you're planning a new composite deck or replacing one that's already showing its age near Cherry Point, we're glad to come take a look and walk you through what your specific site needs — sun exposure, wind, existing framing, all of it. Use the form below to request a free, no-pressure estimate.