How is composite decking different from capped PVC decking?

Composite decking is a blend of wood fibers and plastic, giving it a more natural look and feel, while capped PVC is fully synthetic with a protective outer layer. Both resist moisture well, but PVC handles constant shade and dampness slightly better, while composite is usually the more budget-friendly choice. We help homeowners weigh that trade-off based on where the deck sits on the property.

What questions should I ask before hiring a deck contractor in Skagit County?

Ask whether they carry proper licensing and insurance, whether they'll put joist spacing and fastener specs in writing, and how they handle drainage and ventilation under the deck. Also ask how many decks they've built in this specific climate versus drier regions, since that experience shows up in how the substructure is planned. A contractor who can answer these clearly without hedging is usually a safe bet.

Do all composite decking brands perform the same way?

No — composite products vary in how the wood fiber and plastic are blended, how the surface is capped or protected, and how they handle moisture and fading over time. Some lower-cost composite products are more prone to surface mold in shaded, damp spots if airflow underneath is poor. We can walk you through which product lines have held up well on the decks we've built and serviced locally.

Can composite decking be installed directly over an existing wood deck frame?

Sometimes, but only if the existing framing is structurally sound, properly spaced for composite board requirements, and free of rot — which is common on older wood decks in this climate. In many cases in Burlington we find the substructure needs at least partial rebuilding to meet proper joist spacing and drainage standards. We inspect the existing frame before recommending a resurface versus a full rebuild.

Does a composite deck need to be sealed or treated for our rainy winters?

No — that's one of the main advantages of composite over wood, since the boards themselves don't need sealing or staining to resist moisture. What does matter is making sure the deck was built with proper drainage and airflow underneath, since standing water or poor ventilation can still cause problems around the framing and hardware over a long Skagit County winter.

Burlington Composite Decking Installation | Skagit County Crew

Decking Built for Burlington's Weather, Not a Catalog Photo

Burlington sits in a stretch of Skagit County that gets the full weather package: long wet winters, a moss season that seems to start earlier every year, and enough humidity year-round that anything with exposed end grain or a poor drainage plan will eventually show it. Composite decking has become the go-to choice for homeowners here who are tired of sanding, staining, and chasing rot on wood decks every couple of years. But composite isn't maintenance-free just because the marketing says so — it's maintenance-different, and getting the installation right matters more in this climate than in drier parts of the state.

We're a local crew that works Burlington and the surrounding Anacortes and Skagit County area regularly, which means we're not guessing at how a deck will behave through a wet Pacific Northwest winter. We've seen what happens when a deck is installed without enough airflow underneath, or when flashing gets skipped to save an afternoon. This page covers what a composite deck actually needs to hold up here, and what our process looks like from first look to final walkthrough.

What Burlington's Climate Does to a Deck

Moisture That Doesn't Let Up

Skagit County's rainy season isn't just about total rainfall — it's about how many consecutive weeks a deck surface and substructure stay damp. Wood decking in this environment needs regular sealing to keep water out of the grain. Composite decking resists that kind of moisture absorption far better, but the boards are only half the equation. The framing underneath, the ledger connection to the house, and the gaps between boards all need to be built assuming water will be present most of the year, not occasionally.

Moss and Algae Growth

Shaded decks, north-facing decks, and decks tucked under trees in Burlington neighborhoods develop moss and algae film faster than most homeowners expect. This isn't a defect in the decking — it's biology responding to constant moisture and low sun exposure. The difference between a deck that stays walkable and one that gets slick is airflow and drainage, which comes down to how the deck was framed and spaced, not just what brand of board sits on top.

Salt Air and Coastal Exposure

Being close to Puget Sound and the San Juan waterways, Burlington and the broader Anacortes area get a mild but real dose of salt air. It's not the same intensity as an oceanfront property, but over years it accelerates corrosion on fasteners, brackets, and any hardware that isn't rated for it. This is one of the most common corner-cutting spots we see on older or budget deck builds — plain steel screws and hangers that look fine for the first year or two, then start staining the decking and weakening the connection.

Why Composite Makes Sense Here — And Where It Doesn't Solve Everything

Composite decking's real advantage in this climate is that the boards themselves don't absorb water and swell, rot, splinter, or need annual staining the way wood does. For a lot of Burlington homeowners, that's the whole reason to switch. But composite decking is not immune to problems if the structure underneath is wrong. Composite boards can still trap moisture against poorly ventilated framing, and cheaper composite products can fade or show mold on the surface film if they sit in a shaded, damp spot without enough airflow.

Our standard is to treat the composite board as the finish layer and put the real engineering effort into what's underneath it: joist spacing, ventilation, flashing, and fastener quality. A deck built this way is the difference between "composite decking" as a marketing term and a deck that actually performs the way composite is supposed to.

Composite vs. Wood vs. PVC — Honest Trade-offs for This Area

Material	Moisture Behavior in Skagit County	Maintenance	Typical Lifespan Here
Pressure-treated wood	Absorbs water, prone to swelling and checking through wet winters	Annual cleaning, periodic sealing/staining	10-15 years before major repair or replacement
Composite (wood-plastic blend)	Resists absorption; needs good airflow underneath to avoid surface mold	Periodic washing, no sealing or staining	25-30+ years with correct install
Capped PVC	Fully resists moisture absorption; least sensitive to shaded, damp spots	Occasional washing	25-30+ years, higher upfront cost

We install composite as our standard recommendation for most Burlington homes because it balances upfront cost against long-term performance well for this climate. For decks in heavily shaded, low-airflow spots, we'll sometimes recommend capped PVC instead and explain why — it's a judgment call based on the site, not a upsell.

What a Correct Composite Deck Build Actually Involves

Substructure First

Joists rated and spaced correctly for composite decking (composite typically needs tighter joist spacing than wood, especially on diagonal or picture-frame layouts), pressure-treated or engineered framing lumber, and a ledger board properly flashed and bolted to the house structure — not just lag-screwed through siding.

Drainage and Airflow

Enough clearance between the ground and the underside of the deck for air to move, gapping at board ends and along the perimeter so water sheds instead of pooling, and grading or drainage consideration under low decks so water doesn't sit against posts and footings through the winter.

Fasteners and Hardware

Stainless steel or coated fasteners rated for coastal/high-moisture exposure, hidden fastener systems where appropriate for a clean surface without exposed screw heads that can corrode and streak the boards, and joist hangers and structural hardware matched to the same corrosion-resistance standard as the fasteners.

Board Layout and Expansion

Composite boards expand and contract with temperature more than people expect. Proper end-gap spacing at butt joints and against house walls or posts prevents buckling later. This is a step that's easy to rush and hard to fix after the fact.

Our Process for a Burlington Deck Project

On-site assessment. We look at sun exposure, shade patterns, existing drainage, and how close the deck sits to the ground — all of it changes the plan.
Honest material recommendation. Composite for most sites; we'll say plainly if your specific spot calls for something different.
Structural plan. Joist layout, ledger attachment, and hardware spec'd for coastal Skagit County conditions before any decking goes down.
Build and inspect. Framing, flashing, and fastening done in sequence with checks at each stage, not just at the end.
Decking installation. Board layout planned for expansion gaps and clean sightlines, hidden fasteners where applicable.
Final walkthrough. We show you the finished deck and explain basic care — there's very little of it with composite, but what there is, we cover clearly.

Why a Local Crew Matters More Than It Sounds Like It Should

A lot of deck problems we get called to fix in Burlington and nearby areas weren't caused by bad materials — they were caused by a build that didn't account for how wet this region stays for months at a time. Crews who mostly work drier climates, or who build to a generic national spec, sometimes under-plan for ventilation and drainage because it simply isn't as critical where they usually work. We build decks in Skagit County conditions as our default, not as an exception, because it's what's in front of us every week.

That also means we know which composite lines have held up well on decks we've built or serviced in this area, which fastener systems actually resist the salt-air corrosion we see, and how to size joist spacing for boards that will spend a good part of the year cold and wet.

Maintenance: What Composite Actually Needs in This Climate

Rinse or sweep debris off the deck surface periodically, especially in fall when leaves and needles accumulate and hold moisture against the boards
Wash with mild soap and water a couple times a year to prevent moss and algae film from establishing, more often on shaded sections
Keep gutters and downspouts near the deck clear so runoff isn't dumping extra water onto the deck surface or framing below
Check underneath the deck occasionally for standing water or blocked airflow, particularly on low decks close to grade
Inspect fasteners and hardware every year or two for early signs of corrosion staining, especially on decks closer to the water
Avoid pressure-washing at close range or high PSI, which can damage the surface texture on some composite products

Cost Factors Homeowners Should Know Upfront

Composite decking costs more upfront than pressure-treated wood, and the total project cost depends heavily on factors beyond the decking material itself:

Deck size and shape — picture-frame borders, diagonal layouts, and curves add labor and material
Height off the ground and whether railing, stairs, or additional structural support are needed
Condition of any existing structure being replaced versus building new
Site access and how much existing landscaping, hardscape, or old decking needs to be removed first
Composite product tier — entry-level composite versus premium capped composite or PVC

We'll walk through these factors specific to your property so the estimate reflects your actual site, not a generic per-square-foot number that doesn't hold up once we see the job.

If you're planning a new deck or replacing an aging one in Burlington, we're glad to take a look and give you a straight read on what your site needs. Reach out for a free, no-pressure estimate through the form below.