How is composite decking actually made, and does that affect how it holds up in wet weather?

Composite decking is manufactured from a blend of wood fiber and recycled plastic, usually finished with a protective cap layer that resists moisture absorption. Because the wood fiber is encapsulated rather than exposed, the boards don't swell, splinter, or rot the way solid wood does when it's repeatedly wet. The cap layer is also what gives most composite products their resistance to staining and surface mold.

What should I ask a contractor before hiring them for a deck build in this area?

Ask specifically what fasteners and hardware they use, since standard interior-grade hardware corrodes quickly in salt air. Ask how they handle ledger flashing and under-deck drainage, not just what decking brand they install. A contractor who can answer those questions in detail, rather than just talking about board color options, is usually the one who understands the structural side of the job.

Are all composite decking brands basically the same?

No — composite lines differ in cap thickness, core material, and how well they resist moisture and organic growth, and those differences matter more in a wet, moss-prone climate than in a dry one. Higher-tier boards typically cost more but hold color and resist staining longer. We can walk through specific product options and their trade-offs during an on-site estimate.

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

Sometimes, but only if the existing framing is structurally sound and properly spaced for composite board requirements, which are stricter than for solid wood in some cases. In a climate like this one, existing framing has often taken on hidden moisture damage that isn't visible from the surface, so we always inspect the substructure before recommending a resurface over a full rebuild.

Does Burlington's proximity to the water actually change how a deck should be built compared to a few miles further inland?

Yes — properties closer to the water deal with more airborne salt, which accelerates hardware corrosion, and often see more direct exposure to driving rain and wind. That combination is why we specify corrosion-resistant fasteners and pay close attention to drainage and airflow on every deck we build in and around this community, rather than using a one-size-fits-all approach.

Expert Composite Decking for Burlington Homes

Decking Built for Burlington's Weather, Not Just Its Looks

A deck in Burlington doesn't live an easy life. Between the salt-laden air moving in off the water, long stretches of driving rain through fall and winter, and a moss season that seems to start earlier every year, the ground-level and elevated decks around this community take a beating that inland decks simply don't. We build and replace decks here often enough to know that the products and details that work fine forty miles inland can fail early in this specific microclimate. This page is about one thing: doing composite decking right, for Burlington conditions, with a crew that already understands what this weather does to a structure over time.

What Salt Air, Rain, and Moss Actually Do to a Deck

Each of these three factors attacks a deck differently, and understanding the mechanism is what separates a deck that lasts from one that doesn't.

Salt Air

Airborne salt accelerates corrosion on any exposed metal — screw heads, joist hangers, structural brackets, railing hardware. A fastener that would last decades in a dry inland climate can start rusting and staining within a few seasons here. Once a fastener corrodes, it weakens, and rust streaks bleed into the decking material itself, which is both a structural issue and a cosmetic one.

Driving Rain

Rain that comes in sideways, rather than straight down, gets forced into gaps that a standard installation might not account for — ledger connections, board end joints, stair stringers, and the perimeter where decking meets the house. Standing water and trapped moisture underneath a deck is one of the leading causes of hidden rot in the framing below, even when the decking surface itself looks fine.

Moss and Organic Growth

A long, damp moss season means organic growth gets a real foothold on any surface that stays shaded or doesn't drain and dry quickly. Moss and algae hold moisture against the decking material, they make boards slick and unsafe underfoot, and on the wrong product they can work into surface texture in a way that's genuinely hard to reverse.

Why Composite Decking Fits This Climate

Composite decking — boards made from a blend of wood fiber and recycled plastic, typically with a protective cap layer — is a strong fit for Burlington precisely because it doesn't behave like solid wood in wet conditions. It won't absorb water the way a natural wood board does, so it isn't prone to the swelling, cupping, and splintering that shows up on wood decks after a few wet winters. It also doesn't need annual staining or sealing to keep moisture out, which matters in a place where a dry, mild stretch to do that kind of maintenance work can be hard to find.

That said, composite isn't maintenance-free, and any contractor who tells you otherwise isn't being straight with you. It still needs airflow underneath, it still needs periodic cleaning to stay ahead of moss and mildew, and the quality of the install underneath the boards matters just as much as the boards themselves. A composite deck built on a poorly ventilated, poorly flashed substructure will still develop hidden rot in the framing — the composite surface just hides the problem longer, which is worse, not better.

What a Correct Installation Actually Involves

Most of what determines whether a deck holds up in this climate happens before a single composite board goes down. This is where we spend the most attention.

Framing and Ledger Connection

The ledger board — where the deck attaches to the house — is the single most common failure point on decks in wet climates. It needs proper flashing that directs water away from the house band joist, not just caulk and a hope. We use structural fasteners and connectors rated for exterior, corrosion-prone environments, not standard interior-grade hardware.

Drainage and Airflow

Joist spacing and the gap between boards are set to let water move through and air circulate underneath, rather than pooling on top of joists or getting trapped in dead air pockets. For decks close to grade, we also look at how water drains away from the structure underneath, not just off the surface.

Fasteners and Hardware

Every screw, bracket, and joist hanger is chosen for corrosion resistance appropriate to a salt-air environment, not just whatever is cheapest at the yard. This is a small line item on an estimate and one of the biggest factors in how a deck ages over ten or fifteen years.

Board Layout and End Treatment

Composite board ends need to be capped or protected per manufacturer spec, and layout is planned to minimize butt joints in high-exposure areas. Stair treads and any area that holds standing water get extra attention, since these are where moss and slip risk show up first.

Composite vs. Other Decking Materials for This Climate

Material	Moisture Behavior	Maintenance	Typical Lifespan Here
Pressure-treated wood	Absorbs water; prone to cupping, splitting, and rot without diligent upkeep	Annual cleaning, staining/sealing	10–15 years before major repair or replacement
Composite	Doesn't absorb water; capped boards resist staining and moisture damage	Periodic washing to control moss/algae; no staining or sealing	25+ years with proper substructure
Cedar	Naturally rot-resistant but still absorbs moisture; performance depends heavily on upkeep	Regular oiling/sealing, more frequent in wet climates	15–20 years with consistent maintenance
PVC	Fully moisture-resistant, doesn't hold water at all	Low; occasional washing	25–30 years

We install composite decking as our standard recommendation for most Burlington projects because it strikes the right balance of moisture performance, appearance, and cost. PVC is a reasonable option for homeowners who want the lowest possible maintenance and are comfortable with its different look and higher price point; wood and cedar remain valid choices for homeowners who prefer the natural material and are willing to commit to the upkeep it requires in this climate.

Our Process, Start to Finish

On-site assessment: We look at the existing structure (if there is one), grade, drainage, and sun/shade exposure specific to your property.
Honest estimate: You get a clear scope of work and pricing before anything starts — no surprise change orders for things we should have caught up front.
Framing and structural work: This is where we install proper flashing, corrosion-resistant hardware, and correct joist spacing for drainage and airflow.
Decking installation: Boards are laid per manufacturer spec with attention to fastening pattern, board gaps, and end treatment.
Railing, stairs, and finish details: Hardware and fasteners here are chosen for the same corrosion resistance as the structure below.
Final walkthrough: We go over care and cleaning specific to your product and your property's exposure before we consider the job done.

Keeping a Composite Deck Ahead of Moss and Algae

Composite decking makes maintenance simpler than wood, but "low-maintenance" isn't "no-maintenance," especially with a moss season as long as this region's. A few habits go a long way:

Sweep debris off the deck regularly, especially fallen leaves and needles that trap moisture against the board surface
Wash the deck at least once or twice a year with a soft-bristle broom or brush and a cleaner rated for composite material — avoid pressure washing directly into the board grain
Keep gutters and downspouts near the deck clear so runoff isn't dumping directly onto the surface or the framing below
Trim back overhanging branches and vegetation that keep sections of the deck shaded and slow to dry
Check the underside of the deck once a year for standing water, debris buildup, or early signs of hardware corrosion
Address any slick, shaded, or persistently damp spots early — that's usually where moss gets its first foothold

What Affects the Cost of a Composite Deck Here

Factor	Why It Matters in This Climate
Deck size and height	Elevated decks need more substantial framing and railing to meet code, and more corrosion-resistant hardware overall
Substructure condition	Replacing or reinforcing existing framing that's seen rain damage adds cost but is not optional for a safe, lasting deck
Board tier and brand	Composite lines vary in cap thickness and moisture/moss resistance; better-protected boards cost more up front and less over time
Railing system	Composite, metal cable, or glass railing all have different installation and hardware requirements
Site access and grade	Sloped or hard-to-access lots common in this area can add labor for both framing and drainage work

We don't publish blanket prices because every property and every existing structure is different, but a straightforward estimate that walks through these factors is part of every quote we give.

Why Hire a Crew That Already Works in Burlington

A contractor who mostly works dry, inland projects can still build a deck that looks right on the day it's finished. The difference shows up two or three winters later, when hardware that wasn't rated for salt air starts to rust, or when a substructure that wasn't detailed for driving rain starts trapping moisture nobody can see yet. We work in this climate regularly, which means the flashing details, fastener choices, and drainage planning described above aren't extra steps we upsell — they're just how we build here, because we've seen what happens when they're skipped.

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