Ferndale Siding Building a Custom Deck for Kendall's Climate
Kendall sits in a stretch of Whatcom County that puts real, sustained weather stress on anything built outdoors. Salt-tinged marine air works on exposed metal and fasteners year-round. Rain here doesn't fall politely straight down — wind drives it sideways and up under railings, ledger boards, and gaps between decking that weren't built to handle it. And a long, damp moss season settles into shaded and north-facing surfaces for months at a stretch, longer than most homeowners expect until they're scrubbing it off a deck for the third time in a year. A deck has no roof and no wall to shield it from any of that, so it takes the full brunt of local conditions in a way siding or roofing partially avoids.
A custom deck built for Kendall isn't just a matter of picking a layout and a decking color. It's material selection, fastener grade, and drainage detailing chosen specifically for what this part of Whatcom County does to outdoor structures, not a generic deck design dropped onto a Kendall lot. This page covers what a Kendall deck actually needs from a build, what a correct job involves start to finish, and why hiring a crew that already works this area matters more here than it would somewhere drier and calmer.
What Kendall's Climate Does to a Deck
Salt Air and Fastener Corrosion
Salt-tinged air moving through this part of Whatcom County accelerates corrosion on any exposed metal, and a deck has more of it in play than most homeowners realize — surface screws, hidden fastener clips, joist hangers, post bases, and railing hardware. A fastener that starts corroding loses holding strength well before it looks visibly bad, and on a structure people stand and walk on, that's a real concern, not a cosmetic one.
Wind-Driven Rain
Storms in this area push rain sideways and upward instead of letting it fall straight down and run off. That pattern drives water into ledger connections where the deck ties to the house, up under railing posts, and between decking boards that aren't gapped correctly for drainage. A deck that would shed water fine in calm conditions can still trap moisture the moment wind gets involved, and around here wind is usually involved.
A Moss Season That Runs Most of the Year
Mild temperatures and near-constant dampness give moss and mildew a long growing season in Kendall, and a horizontal deck surface is one of the first places it takes hold — it holds standing water longer than a vertical wall and stays damp between rain events. Shaded decks, north-facing surfaces, and anything under tree cover are usually first to show it, and any decking material with surface porosity gives moss something to grip onto.
Choosing the Right Decking Material for This Climate
Material choice matters more in Kendall than it does in a drier, more sheltered town, because the performance gap between a well-suited product and a poorly-suited one shows up faster here. The three main categories homeowners weigh are pressure-treated or cedar wood, capped composite, and cellular PVC.
Wood
Pressure-treated lumber and cedar look good when new and remain a popular choice, but both need regular sealing or staining to hold up against sustained moisture, and both are more vulnerable to fastener corrosion over time in salt-tinged air. Left unmaintained even a season or two, wood is usually the first material on a Kendall deck to show moss, graying, and soft spots.
Capped Composite
Capped composite boards have a plastic shell around a wood-fiber composite core, which resists moisture absorption, staining, and UV fade far better than uncapped composite or wood. In a climate with this much sustained moisture and salt exposure, that cap layer is doing real functional work — it's the difference between a board that needs occasional washing and one that needs ongoing sealing to stay protected.
Cellular PVC
PVC decking contains no wood fiber at all, so it doesn't absorb moisture the way even capped composite can at cut edges or fastener holes. It typically costs more than composite and can flex more under heavy point loads, but for a shaded, moisture-heavy deck site, some homeowners find the added moisture resistance worth the higher price.
| Material | Handling Salt Air & Moisture | Moss Resistance | Upkeep |
|---|---|---|---|
| Cellular PVC | Excellent — no wood fiber to absorb moisture | Strong, smooth non-porous surface | Occasional washing |
| Capped composite | Strong — cap layer resists moisture and staining | Good on most product lines | Occasional washing |
| Uncapped composite | Moderate — some moisture absorption at exposed fiber | Fair; more prone to buildup over time | Periodic cleaning |
| Cedar | Moderate — natural resistance, but needs sealing | Fair when sealed and maintained | Regular oiling or sealing |
| Pressure-treated wood | Weak against sustained salt exposure over time | Poor without regular treatment | Regular sealing or staining |
What a Correctly Built Deck Involves Here
The visible decking surface gets most of a homeowner's attention, but in Kendall's climate, the framing, fasteners, and drainage details underneath are what actually determine how long the deck holds up. A build done right for this area includes:
- Framing material rated for sustained moisture exposure, sized correctly for the actual span and load rather than a generic layout
- Stainless steel or coastal-grade corrosion-resistant fasteners throughout, not standard hardware that starts corroding in salt air within a few seasons
- Hidden fastener systems on the walking surface where the product allows, reducing exposed metal and giving a cleaner, smoother finish
- Correct board gapping so wind-driven rain and standing moisture can actually drain and dry between boards instead of pooling
- Proper ledger board flashing where the deck ties into the house — one of the most common places moisture gets into a poorly built deck
- Joist spacing matched to the specific decking product's span rating, not a one-size-fits-all framing plan
- Railing and post attachment sized for the wind exposure the specific site actually sees
- Ventilation and grading underneath the deck so moisture doesn't sit against the framing between storms
Skip any one of those details and the deck usually still looks fine on day one. The problems show up a couple winters later — a soft joist, a loosening railing post, or fastener corrosion staining the boards around it.
Custom Design Considerations for Kendall Properties
Beyond material and structure, a custom deck in Kendall has a few site-specific design questions worth working through before anything gets built. Wind exposure affects how open a railing design can be versus how much value a partial wind screen or glass panel adds. Sun and shade patterns affect which decking colors and materials will hold up best against fading and moss, since a heavily shaded deck needs different moss-resistance priorities than one that gets sun most of the day. Grade and drainage around the house affect stair placement and whether the substructure needs extra attention for standing water. None of these are one-size-fits-all answers, which is part of why a custom deck designed for a specific Kendall lot performs differently than a stock plan built the same way everywhere.
Cost Factors Worth Understanding
Deck bids can vary widely for what looks like the same basic project on paper, and the gap usually comes down to real differences in scope rather than one contractor simply charging more for identical work.
| Factor | What It Affects |
|---|---|
| Decking material | Wood, composite, and PVC carry different material costs and long-term maintenance burdens |
| Fastener and hardware grade | Coastal-grade stainless hardware costs more upfront but resists corrosion far longer than standard fasteners |
| Framing and footing depth | Load requirements, span, and local frost-depth footing rules affect substructure cost |
| Deck size and elevation | Larger or elevated decks need more structural engineering, stairs, and railing |
| Ledger and flashing detail | Correct flashing at the house connection takes more time but is where leaks most often start if skipped |
| Railing style | Cable, glass, and custom composite railing systems cost more than standard baluster railing |
A detailed written estimate that itemizes these components tells you far more than a single lump-sum number, and it's worth asking any contractor to walk through exactly what's included before comparing prices side by side.
How Our Process Works
We start with a site visit to look at what's actually there — existing structure condition if it's a replacement, drainage and grade around the deck area, sun and wind exposure through the day, and how sheltered or exposed the specific lot is. From there we talk through decking material options that fit the budget and how the space will actually get used, whether that's a quiet spot off the kitchen or a larger deck built for entertaining.
Permitting in Kendall and the rest of Whatcom County generally follows standard setback, structural, and elevation requirements, and we handle that as part of the job rather than leaving it for the homeowner to sort out. Once permitted, the build follows the sequence above — substructure and framing first, sized and fastened for the site's actual exposure, then the decking surface, railing, and any stairs or trim work. We finish with a walkthrough covering what the specific material you chose actually needs going forward, which for most modern decking is minimal, but not nothing.
What Your Deck Still Needs From You
Even a well-built deck in the right material needs some routine attention in this climate to reach its full lifespan.
- Rinse or wash the deck surface periodically to clear salt residue, pollen, and organic buildup before it works into the surface or cap layer
- Keep gaps between boards clear of leaves and debris so water and airflow can move through the way the design intends
- Check railing posts and hardware once a year for early corrosion or loosening, especially heading into the wet season
- Trim back overhanging branches or plants that hold moisture against the deck or block sun and airflow across the surface
- Address any soft framing or standing water underneath right away — that's a structural issue, not a cosmetic one, and it doesn't improve on its own
Why Hiring a Crew That Already Works Kendall Matters
A crew that mostly builds decks elsewhere can still put one together competently, but a Kendall job has variables that don't come up as often in drier or more sheltered parts of the county — corrosion-grade fastener requirements from sustained salt exposure, wind loads tied to how open or exposed a particular lot is, and moss pressure that runs longer here than it does further inland. Working this area regularly means we're not guessing at those requirements on your project. We've seen which decking lines actually hold up against Kendall's specific combination of salt air, driving rain, and moss, and which fastener grades and framing details are worth the extra time rather than an upsell nobody needs.
That familiarity also shows up in the smaller judgment calls — how to orient a deck for the wind a particular lot actually sees, or being straightforward with a homeowner about what a deck here realistically needs to last versus what's just an extra line item on a bid.
A Practical Checklist Before You Choose a Deck Builder
- Do they specify fastener grade and framing material for coastal/marine-air exposure, or leave it vague?
- Does the estimate detail ledger flashing at the house connection, not just decking material and size?
- Do they carry current Washington contractor licensing, liability insurance, and workers' compensation?
- Can they explain board gapping and drainage design for wind-driven rain, specifically?
- Can they point to recent, real local work in or near Kendall or nearby Whatcom County towns?
- Does the bid separate the manufacturer's material warranty from their own workmanship warranty?
Whether you're replacing a tired deck, building new, or want an honest read on what a custom deck would take on your Kendall property, we're happy to walk the site with you and lay out the options plainly, with no pressure to sign anything on the spot. Use the form below to request a free estimate.