Blaine Building a Deck That Can Actually Handle Custer's Weather
Custer sits close enough to the water and open farmland north of Blaine that decks here take a beating most inland decks never see. You get salt-laden air blowing in off the Strait and Drayton Harbor, long stretches of driving rain through fall and winter, and a moss season that can run eight months or more depending on how much sun a deck gets. A deck built the way it would be built in a drier, inland part of the state doesn't hold up the same way out here. We build decks specifically for this stretch of Whatcom County, and that shows up in the materials we choose, how we frame underneath, and the hardware we use to fasten it all together.
This page is about one thing: custom deck construction for homes in and around Custer. Not a general overview of decking — the specifics of what works here, what fails here, and how we approach the job so it lasts.
What Salt Air, Rain, and Moss Actually Do to a Deck
Each of these three factors attacks a deck differently, and a deck that only defends against one of them is still vulnerable.
Salt Air
Airborne salt is corrosive to metal. Fasteners, joist hangers, post bases, and railing hardware that aren't rated for coastal exposure will start showing rust streaks and pitting years before they should. Once a fastener corrodes, it loses holding strength — and on a deck, that's a structural problem, not a cosmetic one.
Driving Rain
Whatcom County doesn't just get steady rain, it gets wind-driven rain that hits decking boards at an angle and works its way into end grain, fastener holes, and any gap where water can collect. Standing water and trapped moisture are what cause rot, delamination in lower-grade composites, and the freeze-thaw cracking that shows up after a cold snap.
Moss and Algae
Shaded or north-facing decks — common under the mature trees you see around Custer properties — stay damp longer between rain events. That damp surface is exactly what moss and algae need. Beyond looking bad, a mossy deck surface gets slick and holds moisture against the board longer, accelerating whatever decay process is already happening underneath.
Choosing the Right Decking Material for This Climate
There's no single "best" decking material — there's a best material for a given budget, sun exposure, and how much upkeep a homeowner actually wants to do. Here's how the common options hold up specifically against salt air, rain, and moss.
| Material | Moisture Resistance | Moss/Algae Resistance | Maintenance | Typical Lifespan Here |
|---|---|---|---|---|
| Pressure-treated wood | Good if sealed regularly | Needs regular cleaning and re-sealing | Annual cleaning, re-seal every 1-2 years | 10-15 years with upkeep |
| Cedar | Naturally decay-resistant, but surface still needs sealing | Moderate — still grows moss without maintenance | Seal/stain every 1-2 years | 15-20 years with upkeep |
| Capped composite | Excellent — won't rot or absorb water | Better than wood, though algae can still grow on the surface film in shade | Periodic washing, no sealing | 25+ years |
| PVC decking | Excellent — fully synthetic, no wood fiber to hold moisture | Best of this group in consistently shaded areas | Occasional washing | 25-30+ years |
We install all of the above. Our default recommendation for shaded lots or properties closer to the water is capped composite or PVC, because a homeowner who's not going to re-seal a deck every year still ends up with a board that resists moisture and cleans up easily. For homeowners who want the look and feel of real wood and are willing to keep up with sealing, cedar is a solid choice — we just make sure the framing underneath is built to the same standard either way, since the substructure is what actually determines how long a deck lasts.
Framing and Substructure — What's Underneath Matters Most
The decking boards get all the attention, but the framing is what fails first on a poorly built deck. A few things we treat as non-negotiable:
- Joist tape or flashing on top of every joist, so fasteners don't create a direct path for water into the wood.
- Proper ledger flashing where the deck attaches to the house — this is the single most common point of hidden rot on older decks we've opened up.
- Post bases set above grade and never buried in concrete or soil, which traps moisture against the post end.
- Adequate slope and spacing in the decking so water sheds off instead of pooling.
- Ventilation underneath the deck so the framing can dry out between rain events instead of staying damp for weeks at a stretch.
None of this is visible once the deck is finished, which is exactly why it's the part most likely to get shortcut on a rushed job. It's also the part that determines whether a deck is solid in year 15 or needs a rebuild.
Railings, Fasteners, and Hardware for a Salt-Air Environment
Hardware is where a lot of otherwise good decks let homeowners down over time. Standard hot-dip galvanized fasteners are fine in a lot of the country, but in a coastal-influenced environment like Custer, we spec stainless steel or coastal-rated hardware for joist hangers, structural screws, and railing brackets. It costs more up front and it's the difference between hardware that's still sound at year 20 and hardware that's visibly rusting and losing grip by year eight.
Railings get the same consideration. Metal cable or aluminum railing systems need a coastal-grade finish, and any wood railing components need the same fastening standard as the deck frame itself. We also pay attention to how railing posts are through-bolted to the frame — a post that loosens over time is a safety issue, not just a maintenance annoyance.
Our Deck-Building Process
1. On-Site Assessment
We walk the site, look at sun and shade exposure, drainage, existing structures the deck will attach to, and how exposed the location is to wind and rain off the water. This is where we figure out which materials and hardware actually make sense for that specific spot on the property.
2. Design and Layout
We talk through size, shape, railing style, and how the deck will actually be used — entertaining, grilling, a quiet spot off a bedroom — and design around that instead of a generic layout.
3. Permitting
Most custom decks require a permit through Whatcom County or the applicable local jurisdiction, especially for elevated decks or anything attached to the house. We handle that process as part of the job so homeowners aren't left figuring it out themselves.
4. Framing and Substructure
Built to the standards above — flashing, coastal-rated fasteners, proper post bases, and ventilation — before a single decking board goes down.
5. Decking, Railing, and Finish Work
Boards, railings, stairs, and any trim or lighting get installed and finished to spec, with attention to fastener pattern and spacing so water sheds properly.
6. Final Walkthrough
We walk the finished deck with the homeowner, cover basic maintenance expectations for the material chosen, and make sure everything's been inspected and closed out with the permitting authority.
Site-Specific Factors We Watch for in Custer
Custer properties vary — some sit close to open fields with a lot of wind exposure, others are tucked under tree cover with heavier shade and slower drying conditions. Both situations call for adjustments:
- Open, wind-exposed sites need extra attention to railing and post bracing, and fastener schedules that account for higher wind load on the structure.
- Shaded, tree-covered sites need decking and framing choices that account for slower drying time and heavier moss/algae growth, plus a maintenance plan that accounts for that.
- Properties near ditches, wetlands, or low-lying ground need a deck footing plan that accounts for drainage and soil conditions specific to that lot.
We don't guess on these — the on-site assessment is where we figure out which of these apply to a given property before we finalize a design.
Maintenance: What a Whatcom County Deck Actually Needs
Every material has different upkeep needs, but there are a few things that apply across the board for decks in this climate:
- Sweep off leaves, needles, and debris regularly — trapped organic material holds moisture and feeds moss growth.
- Rinse or wash the deck surface at least once or twice a year, more often in heavily shaded spots.
- Check railing posts and stair connections annually for looseness — this is a safety check, not just cosmetic.
- For wood decks, re-seal or re-stain on the schedule the product calls for; skipping a cycle is when rot gets a foothold.
- Keep gutters and downspouts near the deck clear so runoff isn't dumping extra water directly onto or under the structure.
- Inspect under the deck once a year if it's low to the ground or has limited ventilation.
Why It Matters to Hire a Crew That Already Works in Custer
A deck built by a crew that doesn't normally work this close to the water tends to default to standard, inland-spec materials and fasteners — because that's what works most places. The problem only shows up years later, when hardware starts corroding or a shaded section starts rotting from the inside out. We work this part of Whatcom County regularly, so the coastal-rated hardware, the flashing details, and the material choices aren't an upsell — they're just how we build here by default. That's the difference between a deck that needs real work again in eight years and one that's still solid at twenty.
If you're planning a new deck or replacing one that's showing its age, we're happy to come take a look and give you an honest, no-pressure estimate — just fill out the form below.