Burlington Why Blanchard Decks Take More Abuse Than People Expect
Blanchard sits close enough to the water and the low hills west of Burlington that homes here deal with a specific combination most inland Skagit County properties don't: salty, moisture-laden air moving in off the water, long stretches of driving rain through fall and winter, and enough shade and dampness to keep moss and algae going for most of the year. None of that is unusual for this part of Washington, but it's hard on a deck that wasn't built with it in mind.
A deck in a dry inland climate can get away with average materials and a loose build. A deck in Blanchard can't. Fasteners corrode faster, wood fibers stay wet longer between rain events, and any low spot or blocked gap becomes a place for moss, algae, and standing water to set up shop. Composite decking doesn't fix all of that by itself — the way it's installed matters just as much as the product.
Salt Air and Moisture
Salt-laden air accelerates corrosion on any exposed metal — screws, joist hangers, brackets — faster than people expect, especially on decks facing open air with little wind break. It also keeps humidity around the deck surface higher for longer after rain, which matters for how boards, fasteners, and the substructure underneath all hold up over years, not just the first season.
The Long Moss Season
Skagit County's wet season stretches long, and shaded or north-facing decks in Blanchard can stay damp for weeks at a time. Moss and green algae don't just look bad — they make a deck surface genuinely slippery, and if they're left to build up in board gaps or against the house, they hold moisture against materials that would otherwise dry out between storms.
Why Composite Makes Sense for This Climate
Composite decking doesn't rot, doesn't need annual staining, and doesn't absorb water into its fibers the way wood does. That's the honest reason it works well here — not because it's immune to moss or algae (nothing outdoors in this climate is), but because it doesn't degrade structurally when it stays damp. Wood decking in a Blanchard-type environment needs consistent upkeep — cleaning, sealing, spot-checking for soft or splitting boards — to hold up over time. Composite shifts that maintenance burden from "necessary to prevent damage" to "occasional cleaning to keep it looking good."
That said, composite isn't maintenance-free, and we don't tell people it is. It still needs to be cleaned periodically to stay ahead of moss and algae, and the framing underneath — which is usually still wood or in some cases treated lumber or steel — needs to be built correctly for the climate regardless of what decking material sits on top.
What a Correct Composite Deck Build Involves Here
Substructure and Drainage First
The framing underneath a composite deck matters more in a wet climate than the boards do. Joists need proper spacing for the specific composite product being used (composite requires tighter joist spacing than wood in most cases), joist tape or flashing to protect the wood from trapped moisture, and enough slope and airflow underneath that water doesn't pool. A deck that traps water under the boards will grow moss and mildew in the gaps no matter how good the composite is on top.
Ledger Board and House Attachment
Where the deck attaches to the house is the single most common failure point on any deck in a rainy climate, composite or wood. Proper flashing behind the ledger board keeps water from working its way into the house framing — this is a spot we're careful about on every job, because it's invisible once the deck is finished but expensive to fix if it's done wrong.
Board Selection and Fastening
Most composite decking today uses hidden fastener systems that clip boards from the side rather than screwing through the face. This keeps water from sitting in screw holes on top of the board, which matters when boards spend a lot of the year wet. Board spacing between planks also needs to account for this region's rain — too tight, and the gaps clog with debris and hold moisture; too wide, and the deck feels unfinished and can be uncomfortable underfoot.
Composite Decking Options — What Actually Changes the Price and Performance
| Factor | Entry-Level Composite | Capped/Premium Composite |
|---|---|---|
| Moisture resistance | Good, but the core can absorb some moisture at cut edges | Better — a plastic cap fully wraps the board, including most edges |
| Fade/stain resistance | Moderate; can show streaking from moss or algae over time | Higher resistance to staining, easier to keep clean long-term |
| Typical warranty | Shorter, often prorated after a set number of years | Longer, often with stronger fade/stain coverage |
| Upfront cost | Lower per square foot | Higher per square foot |
| Best fit for Blanchard conditions | Covered or partially shaded decks with less direct rain exposure | Open, rain-exposed, or shaded/moss-prone decks |
We'll walk through these trade-offs honestly during an estimate rather than steering everyone to the most expensive option. A covered deck under an eave doesn't need the same spec as an open deck catching full weather off the water.
Our Process for a Blanchard Decking Project
- Site visit and assessment — we look at sun/shade exposure, drainage, existing framing condition (if it's a replacement), and how exposed the deck is to wind-driven rain.
- Design and material selection — board style, color, spacing, railing, and fastening system based on the site conditions and your budget.
- Permitting — Skagit County and local jurisdictions may require permits depending on deck height, size, and attachment to the house; we handle that as part of the project.
- Substructure build or repair — this is where most of the long-term performance in this climate gets decided, so we don't rush it.
- Composite installation — hidden fastening, proper spacing, and clean edge/trim work.
- Final walkthrough — we go over basic care specific to your deck's exposure before we consider the job done.
Living with a Composite Deck in a Moss-Prone Climate
Composite holds up structurally in wet weather, but it still needs occasional attention to stay clean and safe underfoot. A few habits go a long way in a Blanchard-type climate:
- Rinse or sweep the deck periodically through the wet months to keep moss and organic debris from settling into board grooves
- Wash with a soft-bristle brush and a composite-safe cleaner rather than a pressure washer on high pressure, which can damage the board surface
- Keep planters, furniture legs, and mats off the deck surface for long stretches — trapped moisture underneath is where algae takes hold fastest
- Check railing posts and stair connections seasonally for corrosion on any exposed hardware
- Clear leaves and needles out of board gaps before they compost in place and stain the surface
- If moss does establish, treat it early — it's much easier to clean off than to remove once it's gained a foothold
Why It Matters That We Already Work in Blanchard
A crew that mostly builds decks in drier parts of the state will spec a deck the way they always do, because it's worked for them elsewhere. A crew that works Burlington, Blanchard, and the rest of Skagit County regularly knows which framing details matter here, which board spacing actually sheds water instead of trapping it, and where moss tends to build up first on a local deck. That's not a marketing point — it changes real decisions on the job, like joist tape placement, drainage slope, and hardware selection.
We also know what local permitting looks like and what inspectors here expect to see, which keeps a project from stalling partway through.
Mistakes We See on Decks That Weren't Built for This Climate
Most problems we get called out to fix on existing decks in this area trace back to a handful of avoidable issues: no flashing behind the ledger board, joists spaced for wood but used under composite (which can cause sagging or excess flex over time), boards installed too tight with no allowance for expansion, or a substructure with no slope so water sits under the deck year-round. None of these are composite decking's fault — they're installation shortcuts that show up faster in a wet, salt-air climate than they would somewhere drier.
If you're weighing a new composite deck or a replacement for an aging wood deck in Blanchard, we're happy to take a look and give you a straightforward, no-pressure estimate — including what your specific site's sun, shade, and drainage conditions mean for material choice and build details. Use the form below to get started.