How is composite decking different from PVC decking?

Composite decking blends wood fiber with plastic, while PVC decking is cellular plastic with no wood content at all. PVC tends to resist moisture slightly better and weighs less, but composite generally costs less and still performs well in a wet climate when it's a capped product. Which one makes sense depends on your budget and how much moisture exposure the specific deck location gets.

What should I ask a contractor before hiring them for a deck project?

Ask whether they pull permits and handle inspections, what fastener and hardware brands they use, and whether they'll put the scope and product specs in writing before work starts. Also ask how they handle ledger flashing, since that's the most common source of hidden water damage on attached decks. A contractor who can answer these clearly and without hedging is usually one who's done the work before.

Do all composite decking brands perform the same?

No — there's a real difference between capped and uncapped composite, and between manufacturers, in how well boards resist staining, fading, and moisture over time. Warranty length and terms also vary significantly by brand and board tier. We can walk you through the specific product lines we install and how their warranties compare during your estimate.

Why does board spacing matter so much for composite decking?

Composite boards expand and contract with temperature more than wood does, so they need to be installed with a gap that accounts for that movement. Get the gapping wrong and boards can buckle during warm stretches or leave unsightly wide gaps later. It's a detail that's easy to get wrong if a crew is used to building with wood.

Does Ferndale's climate require anything different from decking in other parts of Whatcom County?

The core building principles are the same, but Ferndale's proximity to the water means more salt exposure in the air, which affects hardware choices more than it would further inland. Combined with the region's long wet season, that makes corrosion-resistant fasteners and correct drainage underneath the deck especially important here. It's less about a different product and more about not cutting corners on the details that matter most this close to the coast.

Composite Decking Built for Ferndale's Rain and Salt Air

Ferndale Decks Live in a Tough Microclimate

Ferndale sits close enough to the water and the lowland fog belt that decks here deal with a different set of stresses than decks twenty miles inland. Salt-tinged air off the Strait works into fasteners and hardware year-round. Driving rain off winter storms doesn't just fall on a deck — it drives sideways into railings, stair stringers, and the gaps between boards. And the long stretch of grey, damp months from October through April gives moss, algae, and mildew months to get established on any surface that doesn't drain and dry quickly.

None of that means decking is a bad idea in Ferndale. It means the material and the build have to be chosen for this climate, not for a catalog photo. We've installed and repaired enough decks in this part of Whatcom County to know which details actually matter here and which ones are just upsells.

Why Composite Makes Sense for This Climate

Wood decking isn't wrong for every home, but in a marine, moss-prone climate it asks a lot of the homeowner: annual staining or sealing, regular moss and mildew treatment, and close attention to any board that starts cupping or splitting. Miss a year of maintenance and the clock on rot starts running, especially where boards meet the ledger or where debris collects between boards.

Composite decking is a better match for Ferndale's conditions for a few concrete reasons:

It doesn't absorb water the way wood does, so it's far less prone to warping, splintering, or rot from months of driving rain and standing damp.
It resists moss and algae growth better than untreated or lightly-sealed wood, though it still needs periodic cleaning — nothing in this climate is maintenance-free.
It holds up to salt air without the surface breakdown that raw wood grain can show over time near the water.
It doesn't need annual staining or sealing, which matters a lot when the "good weather window" for that kind of work is short here.

The trade-off is upfront cost and the fact that composite is a manufactured product — quality varies a lot between brands and board tiers, which is why the product choice matters as much as the installation.

Composite Board Types and What They Cost to Install

Composite decking isn't one product — it's a range, and the differences affect both how the deck performs in our climate and what it costs. Broad ranges below are for materials and labor combined on a typical residential deck; actual pricing depends on size, substructure condition, railing style, and site access.

Board Type	What It Is	How It Performs Here	Typical Cost Range
Capped composite	Wood-plastic core with a protective polymer shell	Best moisture and stain resistance; handles driving rain and salt air well	Mid to upper range
Uncapped composite	Wood-plastic blend without a protective shell	More prone to surface staining and moss grip over time in a wet climate	Lower range
PVC / composite-alternative	Cellular PVC, no wood content	Excellent moisture resistance, lighter weight, higher cost	Upper range
Mineral-based composite	Composite with higher mineral content for stiffness	Good rain and UV performance; heavier board, needs proper joist spacing	Mid to upper range

We'll walk you through the actual product lines we install and their warranty terms during the estimate — this table is meant to give you a starting frame, not a final quote.

Other Cost Factors Worth Knowing Up Front

Condition of the existing substructure — reusing sound framing costs less than rebuilding it
Deck height and whether stairs or multiple levels are involved
Railing material — composite, cable, or metal railings all price differently
Site access — decks on tight lots or with limited equipment access take longer to build
Permit and inspection requirements, which apply to most attached decks in Whatcom County

What a Correct Composite Deck Build Actually Involves

Composite boards are only as good as what's underneath them. Most deck failures we get called out to fix aren't a board problem — they're a framing, flashing, or fastening problem that was never done right in the first place. A correct build in this climate includes:

Ledger and Flashing

Where the deck attaches to the house is the single most water-exposed connection on the whole structure. Proper flashing — installed so water sheds away from the house rather than behind the ledger board — is non-negotiable here, especially with the amount of driving rain Ferndale gets off winter systems. A ledger without correct flashing is one of the most common hidden problems we find on older decks.

Joist Spacing and Substructure

Composite boards have manufacturer-specified joist spacing requirements, and they're often tighter than what worked for old wood decking. Building to the composite manufacturer's spec — not just to whatever spacing the old deck had — is what keeps boards from developing a bounce or a long-term sag.

Fasteners and Hardware

In a salt-air environment, hardware quality is not a place to cut corners. We use corrosion-resistant fasteners and hidden clip systems rated for exterior, coastal-adjacent use, so the hardware isn't the weak point in an otherwise good deck.

Airflow and Drainage Underneath

A deck that sits low to the ground or over poorly drained soil holds moisture longer after every rain event, which speeds up moss and mildew on the underside of boards and around footings. Grading, gaps, and ventilation under the deck all factor into how well it dries out between storms.

Board Gapping

Composite boards expand and contract with temperature more than people expect. Gapping them correctly at install — accounting for the season and the specific product's expansion rate — prevents buckling or excessive gapping later.

How Our Process Works

We keep the process straightforward and try not to waste your time with sales pressure:

Site visit and assessment — we look at the existing structure (if there is one), the ledger connection, grade and drainage, and talk through what you actually want out of the space.
Design and product selection — we walk through board tiers, railing options, and layout, with straight talk about what fits your budget versus what's just an upsell.
Written estimate — a clear scope and price before any work starts, no vague allowances.
Permitting — we handle the permit and inspection process for attached decks, which is required for most projects in this area.
Demo and framing — old decking removed if applicable, substructure built or repaired to current code and to the composite manufacturer's spec.
Decking, railing, and stairs installed — with attention to fastening, gapping, and flashing details that matter most in our climate.
Final walkthrough and cleanup — we go over the finished deck with you before we call the job done.

Living with a Composite Deck in a Wet, Mossy Climate

"Low-maintenance" doesn't mean "no maintenance," especially in Whatcom County's long damp season. A few habits go a long way toward keeping a composite deck looking and performing well for years:

Sweep off leaves, needles, and organic debris regularly — trapped moisture under debris is what feeds moss and mildew
Rinse the deck a few times a year with a hose or low-pressure wash to clear pollen, grime, and early moss growth
Keep gutters and downspouts clear so runoff isn't dumping directly onto the deck surface
Check railing posts and stair connections annually for any movement or loosening
Avoid dragging metal furniture or planters across the surface, which can scratch capped boards
Keep planters and rugs elevated slightly or moved periodically so moisture doesn't sit trapped underneath

Mistakes We See on Older or Poorly Built Decks

When we're called out to look at a deck that's failing early, it's rarely the composite boards themselves. It's usually one of these:

Ledger boards flashed incorrectly or not flashed at all, letting water into the house rim joist
Joist spacing built for wood decking, then composite boards installed over it without adjusting
Standard fasteners used instead of corrosion-resistant hardware, leading to staining and early failure near the coast
No gap left for board expansion, causing buckling during warm stretches
Decks built low to grade with no airflow underneath, holding moisture through the wet season

Fixing these after the fact usually costs more than building it right the first time — which is the honest case for hiring a crew that knows the local conditions before the first board goes down.

Why It Matters That We Already Work in Ferndale

A deck built to a generic spec sheet can still fail early if it's not built for the specific conditions of the site. Working regularly in Ferndale and the surrounding Whatcom County area means we already know how the salt air off the Strait affects hardware choices, how much rain a ledger connection needs to shed in a typical winter, and how long moss season really runs here versus in a drier inland climate. That's the kind of judgment that doesn't show up on a spec sheet — it shows up in how the deck holds up five and ten years out.

It also means we're not guessing at permit requirements or inspection expectations for the jurisdiction — we've been through that process here before.

Get a Straightforward Estimate

If you're weighing composite decking for a Ferndale home, we're glad to come take a look, talk through what your site and budget actually call for, and give you a clear, no-pressure estimate. Use the form below to get started.