What's the difference between composite decking and PVC decking?

Composite decking blends wood fiber with plastic and usually has a protective cap layer, while PVC decking is entirely synthetic with no wood fiber core. PVC tends to resist moisture slightly better since there's no wood fiber to swell, but capped composite offers a closer wood-grain look at a lower price point. We help homeowners weigh that trade-off based on budget and how much wood-like appearance matters to them.

How do I know if a decking contractor is actually qualified to work in Washington?

Ask for their state contractor registration number and confirm it's active and in good standing, and ask whether they carry liability insurance and, if they have employees, workers' compensation coverage. A qualified contractor should also be comfortable pulling the necessary building permit rather than suggesting you skip it. Get a written scope of work and be cautious of anyone who won't put the details in writing.

Do all composite decking brands perform the same in a wet climate?

No. Formulations vary in how much wood fiber they contain, whether they're capped on all four sides or just the top and edges, and how the cap layer resists moisture and staining. Older, uncapped composite products are more prone to absorbing water at cut ends than newer fully capped boards. We only install products with a cap system and warranty terms suited to a consistently wet, marine climate like ours.

Can composite decking get slippery when it's wet?

Yes, to varying degrees depending on the board's surface texture, and this is a real consideration given how much rain Whatcom County gets. Most modern composite boards have an embossed or textured surface designed to improve wet-weather traction compared to smooth, older-generation composites. We can point out texture differences between board lines during your estimate if slip resistance is a priority for your household.

Does a deck facing the water need anything different than one further inland in Ferndale?

Decks with more direct exposure to salt-laden air typically need extra attention to hardware and fastener grade, since corrosion shows up faster there than on a similarly built deck a few miles inland. The decking material itself can often stay the same, but we adjust hardware specs and sometimes railing material based on how exposed the site actually is. That's a judgment call we make during the on-site assessment rather than a one-size-fits-all rule.

Composite Decking in Ferndale, WA: Built for Coastal Weather

Ferndale Decks Face a Different Kind of Wear

Ferndale sits close enough to Bellingham Bay and the Strait of Georgia that salt-laden air is a regular part of the weather, not an occasional visitor. Add in the long stretch of driving rain that Whatcom County sees from fall through spring, plus a moss season that can run half the year on shaded lots, and you've got a climate that's genuinely hard on outdoor structures. Decks take the brunt of it because they're horizontal, exposed, and built low to the ground where moisture lingers.

A wood deck in this environment needs yearly attention: stripping, sealing, spot-sanding gray or cupped boards, and scrubbing moss out of the grain before it works its way into the wood fibers. Skip a season and the deck starts showing it fast. That's the backdrop for why so many Ferndale homeowners are moving to composite decking, and why the installation details matter more here than they would in a drier part of the state.

Why Composite Decking Fits This Climate

Composite decking is made from a blend of wood fiber and plastic, usually with a protective cap layer bonded over the core. That cap is the part that matters most in a marine climate like ours — it keeps moisture from soaking into the board the way it does with raw wood, which is what drives rot, splitting, and the slow graying that untreated lumber goes through under constant rain.

That doesn't mean composite is maintenance-free. It still needs to be cleaned, it can still grow a thin film of algae or moss in shaded, damp corners, and the wrong board choice or a sloppy install can still trap water where it shouldn't be. The difference is that composite gives you a much wider margin for error against the specific conditions Ferndale throws at a deck: salt air that corrodes cheap fasteners, rain that never really stops for long, and shade patterns that keep sections of a deck damp long after the rest has dried.

What Salt Air Actually Does

Salt air doesn't just affect properties with a water view. It travels on prevailing winds and settles on any exposed metal, where it accelerates corrosion. On a deck, that means hardware — screws, brackets, post bases, railing connectors — is often the first thing to fail, sometimes years before the decking boards themselves show any wear. We treat fastener and hardware selection as a climate decision, not an afterthought.

What a Correct Composite Deck Installation Involves

Composite decking is less forgiving of installation shortcuts than people expect. The boards themselves are durable, but a deck is a system, and every part of that system needs to account for the moisture load this region delivers.

Framing and Substructure

Composite boards are heavier and behave differently than wood under load, so joist spacing has to match the manufacturer's engineering specs for composite, not the wider spacing that's sometimes acceptable for solid lumber. On replacement projects, we inspect the existing substructure before assuming it can be reused — ledger boards and joists that have been absorbing Whatcom County rain for a decade often have hidden rot that isn't visible from the top.

Moisture Management Underneath

Joist tape over the framing, proper flashing at the ledger where the deck meets the house, and a slight slope away from the structure are all details that matter more in a wet climate than a dry one. Skipping joist tape is a common shortcut that doesn't show a problem for a year or two, then shows up as rot at the fastener points once water has had time to work in.

Fasteners and Hardware

Given the salt air exposure common around Ferndale, we spec stainless steel or coated fasteners and hardware rated for coastal or marine use rather than standard-grade hardware. It costs a bit more up front and it's the difference between hardware that lasts the life of the deck and hardware that starts staining and weakening within a few seasons.

Hidden Fastener Systems

Most composite decking today is designed for hidden fastener clips rather than face-screwing, which gives a cleaner look and eliminates the screw-head pockets where water and moss used to collect on older wood decks. Getting these clips seated correctly, with the right gap spacing for board expansion, is a detail that's easy to rush and hard to fix later.

Choosing the Right Composite Board for This Region

Not all composite products perform the same way in a wet, shaded climate. Capped composite and PVC decking resist moisture better than older uncapped composite formulations, which can absorb water at cut edges and swell over time. We also factor in color and texture: darker boards show pollen and moss growth less than very light colors, but they also run hotter in direct summer sun, so we talk through that trade-off based on where the deck sits on the property.

Material	Moisture Resistance	Moss/Algae Resistance	Annual Maintenance	Typical Lifespan
Pressure-treated wood	Low – absorbs water, prone to cupping	Low – moss embeds in grain	Cleaning, sealing/staining most years	10–15 years
Uncapped composite	Moderate – can absorb at cut edges	Moderate	Periodic cleaning	15–20 years
Capped composite	High – cap layer sheds water	High	Occasional rinse/cleaning	20–25+ years
PVC decking	Very high – no wood fiber core	High	Occasional rinse/cleaning	25+ years

Cost tends to track this same order, with pressure-treated wood the least expensive up front and PVC the most expensive. For most Ferndale homes, capped composite hits the balance point: it holds up to the salt air and rain without the premium price of full PVC, and it doesn't ask for the yearly upkeep wood does.

Our Installation Process

On-site assessment: We look at sun exposure, drainage patterns, proximity to trees or water, and the condition of any existing structure before recommending a board or a plan.
Substructure evaluation: On replacement jobs, we check ledger, joists, and posts for rot or corrosion damage before deciding what can be reused.
Permitting: We handle the permit application through the appropriate local jurisdiction so the project meets current building code, including footing depth and railing requirements.
Framing and moisture protection: Joist spacing to composite spec, joist tape, ledger flashing, and corrosion-resistant hardware throughout.
Decking and railing installation: Hidden fastener systems, correct board gapping for expansion, and code-compliant railing.
Final walkthrough: We go over care and cleaning specific to the board chosen and the site conditions before we consider the job finished.

Living With a Composite Deck in a Wet, Mossy Climate

Composite decking cuts down on maintenance dramatically compared to wood, but "low maintenance" isn't "no maintenance" — especially with the moss season this area sees. A little routine care keeps a composite deck looking and performing the way it should for its full lifespan.

Sweep debris out of board gaps regularly so organic material doesn't sit and hold moisture against the boards.
Keep gutters and downspouts above or near the deck clear so runoff doesn't concentrate on one section.
Trim back overhanging branches where practical to cut down on the shade and leaf litter that feed moss growth.
Clean with plain soap and water or a manufacturer-approved deck cleaner — harsh chemicals can dull the cap layer over time.
Use a soft-bristle brush rather than a pressure washer on tight settings, which can etch or damage the surface of some composite products.
Check railing hardware and fastener clips once a year for early signs of corrosion, especially on decks closer to open water.

Permits and Code Considerations in Whatcom County

Deck construction and replacement in Ferndale and the surrounding parts of Whatcom County generally require a building permit, particularly when the deck is attached to the house, exceeds a certain height off grade, or involves structural changes. Requirements around footing depth, guardrail height, baluster spacing, and stair geometry are set by the adopted building code and get checked at inspection. We build to pass those inspections the first time rather than treating code minimums as optional.

Why Hiring a Crew That Already Works in Ferndale Matters

A lot of what separates a deck that holds up for twenty-five years from one that starts having problems in five comes down to details that aren't visible once the project is finished: how the ledger was flashed, what grade of hardware went into the frame, whether the joist spacing actually matched the composite manufacturer's spec sheet. A crew that regularly works this part of Whatcom County has already seen how salt air, driving rain, and long moss seasons affect decks over time, and builds accordingly instead of learning those lessons on your project.

Local experience also means knowing the practical side: which weeks tend to give a workable weather window for installation, how the permitting process runs locally, and how site conditions can differ between a lot near the water and one further inland, even within the same small city. That familiarity shows up in fewer surprises during the build and a deck that's set up to handle the climate it's actually going to live in.

If you're planning a new deck or replacing one that's showing its age, we're happy to take a look and talk through what makes sense for your property. Reach out for a free, no-pressure estimate using the form below.