Ferndale Composite Decking Built for Kendall's Climate
Kendall sits inland from the water compared to some of the coastal towns in Whatcom County, but the weather that reaches this part of the county doesn't spare an outdoor deck just because it's a few miles from the shoreline. Salt-tinged marine air still carries in on the wind, driving rain still gets pushed sideways and up under railings and between boards during winter storms, and a long, damp moss season settles into shaded and north-facing decks for months at a stretch. A deck has no roof over it and no wall to shield it, so it takes the full brunt of all three, year after year.
Composite decking has become the practical choice for a lot of Kendall homeowners precisely because it holds up better against that combination than traditional wood, but "composite decking" covers a wide range of product quality, and the install underneath the boards matters just as much as which product you pick. This page covers what a correct composite decking project looks like for a Kendall home specifically — the material distinctions worth understanding, the installation details that separate a deck that lasts from one that doesn't, and how our process works from first site visit to final walkthrough.
Why Composite Makes Sense for a Kendall Deck
Wood decking is still a fine choice for some homeowners, and we'll build with it when that's the right fit. But wood needs regular sealing or staining to keep moisture out, and in a climate with this much sustained dampness, skipping even one season of maintenance shows up fast as graying, splintering, or moss taking hold in shaded spots. Composite decking, particularly the capped varieties, resists moisture absorption and surface staining far better without that maintenance cycle, which is a real advantage in a place where the wet season runs long and homeowners have better things to do most weekends than reseal a deck.
That doesn't mean composite is maintenance-free or that every composite product performs the same. Uncapped composite boards, especially older or lower-tier product lines, can still absorb moisture at cut edges and exposed fiber, and cheaper boards are more prone to fading and surface wear over time. The performance gap between a well-chosen composite product and a poorly-chosen one shows up faster here than it would in a drier climate, which is exactly why material selection deserves real attention rather than picking whatever's cheapest at the yard.
What Kendall's Weather Actually Demands from a Deck
Salt Air and Corrosion
Even away from the immediate waterfront, marine air moves through this part of Whatcom County and works on exposed metal over time. Fasteners, brackets, post hardware, and railing connectors are the parts of a deck most vulnerable to it, and a corroding fastener loses holding strength well before it looks obviously bad. On a structure people walk and stand on, that's a real concern, not a cosmetic one.
Wind-Driven Rain
Storms in this area don't just drop rain straight down. Wind pushes it sideways and drives it up under railings, into ledger connections, and between boards that aren't gapped correctly for drainage. A deck that handles a calm rain shower fine can still trap moisture the moment wind gets involved, and that pattern is common enough here that it needs to be planned for, not treated as an edge case.
A Moss Season That Runs Most of the Year
Mild, damp conditions give moss a long growing season, and a horizontal deck surface is one of the first places it takes hold since it holds standing moisture longer than a vertical wall. Shaded decks and north-facing exposures are usually first to show it, and any decking material with real surface porosity gives moss something to grip onto.
What a Correctly Installed Composite Deck Involves
The decking surface gets most of the attention when homeowners picture a new deck, but in this climate, the framing, fasteners, and drainage details underneath are what actually determine how long it lasts. A correct install for a Kendall home includes:
- Pressure-treated framing lumber sized correctly for the span and load, not undersized to save on material
- Stainless steel or coastal-grade corrosion-resistant fasteners throughout, not standard hardware that starts corroding in a few seasons
- Hidden fastener systems on the decking surface where the product supports them, cutting down on exposed metal and giving a cleaner walking surface
- Correct board gapping for drainage and thermal movement, so wind-driven rain and standing moisture can actually drain and dry out between boards
- Proper ledger board flashing where the deck ties into the house, since that connection point is one of the most common places moisture works its way in on a poorly built deck
- Joist spacing matched to the specific composite product's span rating, since composite boards don't all carry the same load spec as wood
- Railing and post attachment sized for the site's actual wind exposure, particularly on elevated decks or more open lots
- Grading and airflow underneath the deck so moisture doesn't sit against the framing between storms
Skip any one of those and the deck usually still looks fine on day one. The problems tend to show up a few winters later — a soft joist, a loosening railing post, or fastener corrosion staining the boards around it — well after the crew that cut corners is gone.
Comparing Decking Materials for Kendall Conditions
| Material | Handling Salt Air & Moisture | Moss Resistance | Upkeep |
|---|---|---|---|
| Capped composite | Strong — cap layer resists moisture absorption and staining | Good on most product lines | Occasional washing |
| Cellular PVC | Excellent — no wood fiber to absorb moisture at all | Strong, smooth non-porous surface | Occasional washing |
| Uncapped composite | Moderate — some moisture absorption at exposed fiber and cut edges | Fair; more prone to buildup over time | Periodic cleaning |
| Cedar or pressure-treated wood | Weak against sustained moisture without regular maintenance | Poor unless sealed and maintained consistently | Regular oiling or sealing |
For most Kendall homeowners, capped composite hits the right balance of upfront cost, low maintenance, and long-term performance against this climate. PVC is worth considering on decks with heavy shade or unusually high moisture exposure, where the extra cost of a fully moisture-proof material can make sense.
Cost Factors Worth Understanding
Two composite deck bids can come in far apart even when they look similar on paper, and the gap almost always comes down to real differences in scope rather than one contractor simply padding the price.
| Factor | What It Affects |
|---|---|
| Composite tier (entry, mid, premium) | Cap thickness, color fade resistance, and manufacturer warranty length |
| Fastener grade | How well hardware resists corrosion from marine air over the life of the deck |
| Framing material and sizing | Structural longevity and how well the substructure holds up under sustained moisture |
| Hidden vs. face-fastened installation | Surface appearance and amount of exposed metal on the walking surface |
| Ledger flashing and drainage detailing | Whether moisture is actually kept out of the house connection and framing over time |
| Deck size, height, and site access | Labor time, staging needs, and permitting requirements |
A detailed written estimate that breaks out these components tells you far more than a single bottom-line number, and it's worth asking any contractor to walk through exactly what's included before comparing bids side by side.
How Our Process Works
We keep the process straightforward, because a project this visible and this expensive deserves a clear explanation at every step.
- Site visit: We walk the site in person to look at existing structure condition if it's a replacement, grade and drainage around the deck area, and sun and wind exposure through the day.
- Material discussion: We talk through composite and PVC options that fit the budget and how the space will actually get used, without steering toward whatever's easiest for us to install.
- Written estimate: You get a clear, itemized bid covering framing, fasteners, decking material, railing, and any permitting — not a vague single-line price.
- Permitting: Deck permitting in Whatcom County generally follows standard setback, structural, and elevation requirements, and we handle that as part of the job.
- Framing and substructure: Built and fastened for the site's actual exposure, sized to the decking product's span rating rather than a generic layout.
- Decking, railing, and trim: Installed with correct gapping, hidden fasteners where the product allows, and proper ledger flashing at the house connection.
- Final walkthrough: We review the completed deck with you and cover what your specific material actually needs going forward, which for most composite products is minimal.
Why Hiring a Crew That Already Works in 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 a drier or more sheltered area — corrosion-grade fastener requirements from marine air, drainage detailing sized for wind-driven rain, and moss pressure that runs longer here than it does further from the coast. Working this area regularly means we're not guessing at those requirements on your project. We've seen which composite lines actually hold up against this specific combination of salt air, driving rain, and moss, and which fastener grades and framing details are worth the extra attention rather than an upsell.
It also matters after the job is finished. A workmanship warranty is only as good as the company standing behind it, and a contractor with an established, ongoing presence in the area is the one you can actually reach a few years down the road if a question comes up.
A Practical Checklist Before You Choose a Deck Contractor
- Do they specify composite tier and product line in the estimate, not just "composite decking"?
- Is fastener grade for corrosion resistance explicitly addressed, or left unmentioned?
- Does the bid include ledger flashing and drainage detailing, not just the visible decking surface?
- Do they carry current WA contractor licensing, liability insurance, and workers' compensation?
- Can they point to recent, real local work in or near Kendall?
- Does the bid separate the manufacturer's material warranty from their own workmanship warranty?
Keeping a Composite Deck Performing Long-Term
Composite decking cuts down on maintenance significantly compared to wood, but "low-maintenance" isn't "no-maintenance," especially in a climate this damp. A short list worth keeping in mind:
- Rinse or wash the deck surface periodically to clear pollen, salt residue, and organic buildup before it works into the cap layer
- Keep gaps between boards clear of leaves and debris so water and airflow can move through as designed
- 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
If you'd like an honest, no-pressure look at what a composite deck would take on your Kendall property, we're glad to come take a look and lay out the options plainly. Use the form below to request a free estimate.