Anacortes Exterior Composite Decking Built for Burlington's Weather, Not Just Its Looks
Burlington sits far enough inland from the water that people sometimes assume it's spared the worst of what Skagit County weather throws at outdoor structures. It isn't. You still get long stretches of driving rain off Puget Sound weather systems, humid air that never fully dries out a deck surface between storms, and a moss season that can run from October well into April. Add in the temperature swings between damp winter mornings and warm, dry summer afternoons, and a deck in Burlington is working harder than most homeowners realize.
Composite decking exists specifically to handle that kind of punishment better than wood does. But "composite" isn't one product — it's a category with real differences in how boards are made, how they handle moisture, and how they age. We install composite decking across Burlington and the surrounding Anacortes area with those differences front and center, not as an afterthought.
What Burlington's Climate Actually Does to a Deck
Moisture that doesn't leave
Wood decking in this part of Skagit County spends much of the year at a moisture content it never fully sheds. That's what drives cupping, splintering, and the slow rot that shows up first at fastener holes and board ends. Composite decking doesn't absorb water into its structure the way wood fibers do, which is the main reason it holds up better here — but the quality of the composite matters. Cheaper capped or uncapped boards can still take on moisture at cut ends and fastener points if they're not sealed and installed correctly.
Moss and algae growth
A shaded deck under trees or on the north side of a house in Burlington can start growing moss within a single wet season if it's not built and maintained right. Composite surfaces resist moss better than untreated wood, but they're not moss-proof — surface texture, drainage under the boards, and how much direct sun the deck gets all affect how fast growth shows up.
Temperature swings and expansion
Composite boards expand and contract with temperature more than most homeowners expect. A deck installed in August heat and one installed in February cold need different gap spacing to look and perform right a year later. This is one of the most common mistakes we see on decks that weren't installed by someone used to our seasonal swings.
UV exposure
Even with our cloud cover, UV fading is real over years of exposure, especially on decks that get full afternoon sun. Board quality and cap technology make a real difference in how much color a deck holds onto after five or ten years outside.
Getting the Substructure Right — Where Most Deck Problems Actually Start
Homeowners tend to focus on the decking boards themselves, but the framing underneath is where a deck's real lifespan gets decided. In a climate like ours, that means:
- Joists and ledger boards protected with proper flashing tape, not just caulk, so water can't wick into the wood framing
- Correct joist spacing for the specific composite product — composite boards often need tighter spacing than wood to avoid flexing over time
- Ledger board attachment to the house that's properly flashed against the siding to prevent water intrusion at the house connection — a common failure point on older Burlington decks
- Adequate airflow underneath the deck so moisture doesn't sit trapped against the framing through our long wet stretches
- Footings set below frost depth and rated for the actual load, not guessed at
A composite deck installed over a poorly built or under-ventilated substructure will still have problems, even though the boards themselves resist moisture. The substructure is where a lot of contractors cut corners because it's invisible once the decking goes down. It's also where we spend a disproportionate amount of our attention.
Comparing Composite to Other Decking Options for This Climate
| Material | Moisture Resistance | Maintenance | Typical Lifespan Here | Upfront Cost |
|---|---|---|---|---|
| Pressure-treated wood | Fair — needs regular sealing | Annual cleaning, staining/sealing every 2-3 years | 10-15 years | Lowest |
| Cedar | Good naturally, degrades without upkeep | Regular sealing, more sanding/maintenance over time | 12-18 years | Moderate |
| Uncapped composite | Good, can still absorb moisture at edges | Occasional cleaning, no staining | 15-20 years | Moderate-High |
| Capped composite | Very good — sealed on all sides | Occasional washing only | 25-30+ years, most with strong warranties | Highest |
We install both wood and composite decking, but for Burlington's damp, moss-prone conditions, we steer most homeowners toward capped composite unless there's a specific reason — budget, a historic-style home, or personal preference — to go another direction. It's a straightforward maintenance-versus-upfront-cost tradeoff, and we'll walk through it honestly rather than push whatever's easiest for us to install.
Our Installation Process for Burlington Decks
1. On-site assessment
We look at sun exposure, drainage patterns around the foundation, existing structure condition if it's a replacement, and any moss or moisture issues already showing up on the property. This tells us as much as the homeowner's own wish list does.
2. Design and material selection
We talk through board profiles, color options, and railing systems, but we frame every choice around how it performs in our climate first and how it looks second — a board that photographs well but traps moisture at the grooves isn't a good fit here.
3. Permitting
Most deck work in Skagit County and the Burlington area requires a permit, especially for anything attached to the house or above a certain height. We handle that process rather than leaving it to the homeowner to sort out.
4. Substructure build or repair
This is the framing, flashing, and footing work described above. On replacement projects, this is also where we find out whether the existing substructure is worth keeping or needs to be rebuilt — sometimes an old deck's frame looks fine until you get the boards off.
5. Decking installation
Boards go down with the correct fastening system for the product — usually hidden fasteners for a clean look — and with expansion gaps set for the season we're building in.
6. Final walkthrough
We go over care basics with the homeowner: what cleaning it actually needs, what to watch for, and what's covered under the manufacturer's warranty versus our own workmanship warranty.
What a Correct Composite Deck Build Needs to Include
- Flashing tape at the ledger board and any other wood-to-composite or wood-to-house connection
- Joist spacing matched to the manufacturer's specification for that specific board, not a generic wood-framing spacing
- Hidden fastener systems installed correctly so boards aren't over-tightened or under-secured
- Proper expansion gaps between boards, sized for the season of installation
- Ventilation gaps at the perimeter and underneath so moisture doesn't get trapped
- Footings sized and set to code for the actual deck load and local frost depth
- A clear written warranty covering both the material and our labor
Maintenance: What Composite Actually Needs in Burlington
One of the real selling points of composite is how little upkeep it needs compared to wood — but "low maintenance" isn't "no maintenance," especially with our moss season. A basic seasonal routine works well for most homeowners:
- Sweep debris off regularly, especially fallen leaves and needles that trap moisture against the surface
- Wash the deck once or twice a year with a soft-bristle brush and a composite-safe cleaner — avoid pressure washers set too high, which can damage the cap surface
- Check and clear drainage gaps between boards so water isn't pooling
- Address any moss growth early with a composite-appropriate cleaner rather than letting it establish
- Inspect railings and fasteners once a year for any movement or loosening
Compare that to a wood deck's annual sanding, staining, and sealing cycle, and the time savings over a decade are significant — which is a big part of why composite has become the default choice for most of the deck replacements we do in the area.
Why It Matters That We Already Work in Burlington
Composite decking installation isn't exotic work, but doing it well in this specific climate takes judgment that comes from experience with local conditions — knowing how much expansion gap a particular board needs in a Burlington winter versus a summer install, knowing which areas of a property tend to hold moisture longer, and knowing what the local permitting process actually requires before work starts. A crew that's built decks across Skagit County and the greater Anacortes area has already made the adjustments that a crew unfamiliar with our weather is still learning. That experience shows up in fewer callbacks, fewer surprises, and a deck that still looks and performs the way it should years after installation.
Get a Straight Answer on Your Deck Project
If you're weighing composite against wood, replacing an aging deck, or planning a new one from scratch, we're happy to walk your property, look at your sun and drainage conditions, and give you an honest read on what will actually hold up. Reach out for a free, no-pressure estimate using the form below.