Burlington Guemes Island sits just off the Skagit County mainland, reached by a short county ferry crossing, and homes out there take a harder, steadier beating from the weather than most properties set further inland. Salt air moves off the water and settles on every exposed surface, driving rain arrives sideways as often as it falls straight down, and a moss season that barely lets up gives every horizontal surface something to fight. A deck absorbs more of that punishment than almost anything else attached to a house, since it usually has no siding, no roof overhang, and often no wall to break the wind. This page is about deck replacement specifically — what a Guemes Island home actually needs once an old deck has reached the point of no return, what a correct replacement job involves, and how our process works for island properties we already serve out of Burlington.
What Guemes Island's Climate Does to a Deck
Three conditions drive most of the deck failures we see on Guemes Island, and they don't act alone — they compound each other over the years a deck sits outside.
Salt Air Off the Water
Being surrounded by water means airborne salt is a constant, not an occasional event. Salt accelerates corrosion in any exposed metal — fasteners, joist hangers, post brackets, railing hardware — and a corroding fastener loses holding strength well before it looks obviously bad. On a structure people walk and stand on, that's a real safety question, not just an appearance issue.
Driving Rain and Wind
Open water exposure means wind-driven rain reaches Guemes Island decks harder and more often than it reaches a sheltered inland lot. That kind of rain doesn't just fall on a deck surface — it drives up under railings, into ledger connections at the house, and between boards that weren't gapped correctly to begin with. A deck built for calm conditions can shed water fine on a still day and still trap moisture the moment wind gets involved, and out here, wind is involved often.
A Moss Season That Doesn't Take a Break
Mild temperatures and near-constant dampness give moss and mildew a long growing season on the island, and a horizontal deck surface is one of the first places it takes hold — it holds water longer than a vertical wall and stays damp between rain events. Shaded decks and north-facing surfaces usually show it first, and any decking material with surface porosity gives moss something to grip onto.
Signs Your Guemes Island Deck Needs Full Replacement
Not every tired-looking deck needs to come out. Some problems are legitimately fixable with a board swap or a hardware upgrade. But certain signs point toward replacement rather than repair, and on an island property where a contractor visit takes more planning than a quick drop-by, it's worth knowing the difference before you call anyone.
- Soft, spongy, or spring-feeling boards across more than one area of the deck, not just a single damaged board
- Rust staining or visible corrosion at fastener heads, joist hangers, or railing brackets
- A ledger board (where the deck attaches to the house) that's soft, stained, or separating slightly from the wall
- Structural posts that feel loose, wobble under weight, or show rot at the base near grade
- Railings that flex or shift when leaned on, which usually points to a post or connection problem, not just a loose baluster
- Persistent moss or mildew that returns within weeks of cleaning, especially combined with soft spots underneath it
- Visible daylight or gapping at the ledger flashing, or staining on the siding directly above the deck attachment
- A deck built more than 15–20 years ago with untreated or standard hardware, regardless of how the surface currently looks
If what you're seeing is limited to a couple of worn boards on an otherwise sound structure, a repair may genuinely be the right call. We'll tell you that plainly during a site visit rather than pushing a full replacement that isn't needed.
Choosing Decking Material for the Replacement
Material choice matters more on Guemes Island than it would on a sheltered inland lot, because the performance gap between a well-suited product and a poorly-suited one shows up faster here. The three categories most homeowners weigh are wood, capped composite, and cellular PVC.
| Material | Handling Salt Air & Moisture | Moss Resistance | Upkeep |
|---|---|---|---|
| Cellular PVC | Excellent — no wood fiber to absorb moisture | Strong, smooth non-porous surface | Occasional washing |
| Capped composite | Strong — cap layer resists moisture and staining | Good on most product lines | Occasional washing |
| Uncapped composite | Moderate — some moisture absorption at exposed fiber | Fair; more prone to buildup over time | Periodic cleaning |
| Cedar | Moderate — natural resistance, but needs sealing | Fair when sealed and maintained | Regular oiling or sealing |
| Pressure-treated wood | Weak against sustained salt exposure over time | Poor without regular treatment | Regular sealing or staining |
Cellular PVC and capped composite are what we recommend most often for island replacements, simply because they hold up against sustained salt and moisture with the least ongoing maintenance. Wood isn't off the table if that's the look a homeowner wants, but we're honest that it asks for more upkeep here than it would on a drier, more sheltered property.
What a Correct Deck Replacement Involves Below the Surface
The decking boards get most of the attention when homeowners picture a replacement, but on Guemes Island, what's underneath is what actually determines how long the new deck lasts. Replacing the surface over a compromised or under-specified substructure just resets the clock on the same problems.
Ledger Board and Flashing
The ledger connection — where the deck attaches to the house — is one of the most common failure points on any deck, and it's often the reason a deck starts failing in the first place. A correct replacement includes new flashing at this connection, properly lapped with the house's water-resistive barrier, not just sealant applied over the old setup.
Fasteners and Hardware
Standard fasteners and hardware corrode faster in this air than a lot of homeowners expect. We spec stainless steel or other corrosion-resistant hardware throughout — joist hangers, structural screws, post connectors — rather than mixing in standard-grade hardware anywhere it will be exposed to weather.
Framing, Joists, and Posts
Framing gets sized to the actual span and load, using lumber rated for sustained moisture exposure, with joist spacing matched to whatever decking product goes on top rather than a generic layout. Posts get set with attention to the wind exposure the site actually sees, since an open, water-facing lot needs sturdier post and railing attachment than a sheltered one does.
Our Deck Replacement Process
- Site visit and assessment. We look at the existing deck's condition, the ledger connection, framing, and drainage underneath, and talk through whether replacement or repair is the honest call.
- Material selection. We go over decking options that fit the budget and how the space gets used, with straight trade-offs for each.
- Permitting. Most deck replacements in Skagit County involve standard permitting depending on scope and elevation — we handle that as part of the job.
- Scheduling around ferry logistics. Materials and crew time get planned around the ferry schedule up front, so the job isn't stalled mid-project by a missed sailing or a load that didn't make the crossing.
- Demolition and framing inspection. The old deck comes out, and we inspect what's actually there — soil, grade, and any hidden rot the surface was hiding.
- Substructure rebuild. New framing, flashing, and corrosion-resistant hardware go in first, sized for the site's real exposure.
- Decking, railing, and stairs. The chosen surface material, railing system, and any stairs get installed to manufacturer specification.
- Final walk-through. We cover what your specific decking material needs going forward, and what to watch for given the island's conditions.
Cost Factors for a Guemes Island Deck Replacement
We don't publish blanket pricing because it wouldn't be honest — every deck and every lot is different. That said, the factors that move a project's cost up or down are consistent enough to lay out plainly.
| Factor | How It Affects Cost |
|---|---|
| Existing damage found at demolition | Rot at the ledger, posts, or framing adds repair scope not visible before tear-out |
| Decking material | Wood costs less up front; capped composite and PVC cost more but need less upkeep here |
| Deck size and design complexity | Multiple levels, built-in seating, or custom railing add labor and material time |
| Site access and staging | Tight lots, slopes, or limited equipment access can add labor time |
| Ferry-dependent delivery | A real scheduling factor when planned ahead, and rarely a major cost driver on its own |
Why Hire a Crew That Already Works Guemes Island
A deck crew that mostly builds on sheltered inland lots isn't wrong about decks in general — they're just working from a different set of defaults. Fastener grades, flashing details, and framing specs that hold up fine on a typical mainland Skagit County property are often undersized for what a Guemes Island deck sees year-round. Working the island regularly means we're not guessing at those requirements on your project — we've seen which materials and hardware actually hold up against this specific combination of salt air, driving rain, and moss, and which corners get cut on decks built by crews who don't come out here often.
There's also the practical side of getting to and from the island at all. Ferry-dependent scheduling for materials and crew time isn't an afterthought for us — it's built into how we plan a job from the first estimate, which means fewer delays and fewer surprises partway through the project.
Caring for Your New Deck
Even a well-built replacement in the right material needs some routine attention to get its full lifespan out here. A short list worth keeping in mind:
- Rinse the deck surface periodically to clear salt residue and organic buildup before it works into the surface or cap layer
- Keep gaps between boards clear of leaves and debris so water and airflow can move through the way it's designed to
- Check railing posts and hardware once a year for early corrosion or loosening, especially heading into the wet season
- Trim back overhanging branches or plants that hold moisture against the deck or block sun and airflow
- Address any soft framing or standing water underneath right away — that's structural, not cosmetic, and it doesn't improve with time
Ready for a Straight Answer About Your Deck
Whether your current deck is showing its age or you already know it's past the point of a repair, we're happy to come take a look and give you a straight read on what your Guemes Island property actually needs — no pressure, no generic sales pitch. Reach out below for a free estimate and we'll walk you through the options plainly.