How long does a deck replacement typically take once work begins?

Most residential deck replacements take one to two weeks of on-site work, depending on size and complexity, though island material delivery can extend the overall timeline. We build that lead time into the schedule upfront so it's accounted for rather than a surprise.

What should I ask a contractor before hiring them for deck work?

Ask whether they pull the required permits themselves, what fastener and hardware grade they use as standard, and whether they'll show you the framing before it's covered by decking. A contractor who's used to coastal conditions should have straightforward answers to all three without hesitation.

Is composite decking worth the extra cost over wood in this area?

It depends on the site. In shaded, poorly ventilated spots where moisture sits, composite or capped-composite boards often make sense because they resist moss and staining with far less upkeep than wood. In sunnier, well-drained locations, a well-maintained wood deck can still be a solid, lower-cost choice.

Do all composite decking brands handle moisture and salt air the same way?

No — capped or PVC products generally resist moisture absorption and staining better than uncapped composite, which can still take on water at cut edges or fastener holes if not detailed correctly during installation. We follow each manufacturer's specific fastening and gapping requirements to keep warranty coverage intact.

Does San Juan County require a permit for a deck replacement?

In most cases, yes, particularly when the work involves framing, footings, or railings rather than a simple board swap. We handle the permitting process as part of the project so homeowners don't have to navigate the county requirements on their own.

Deck Replacement for Friday Harbor Homes | Orcas Island Siding Company

Why Friday Harbor Decks Fail Sooner Than Homeowners Expect

A deck in Friday Harbor works harder than a deck almost anywhere else in the state. It isn't one thing wearing it down — it's three things stacking on top of each other year after year. Salt-laden air off the water accelerates corrosion in fasteners, hardware, and any metal flashing that isn't rated for a marine environment. Driving rain, pushed sideways by wind off the water, gets up under railings and behind ledger boards in ways a calm inland rain never would. And San Juan County's long, damp shoulder seasons give moss and algae months at a time to take hold on any horizontal surface that doesn't dry out quickly.

None of that means a deck here can't last. It means the build has to account for all three from the start — not just the visible boards, but the fasteners, the flashing, and the framing underneath that homeowners rarely think about until something gives way.

Signs a Deck Needs Replacement, Not Another Repair

We get called out to a lot of decks that homeowners assume just need a few boards swapped. Sometimes that's true. Often, once we're underneath, the real problem is in the structure — and patching the surface just delays a bigger repair bill. A few signs point toward replacement rather than repair:

Soft or spongy spots in the decking, especially near the house or around posts
Rust streaks or corrosion around fastener heads and metal connectors
Persistent moss or dark staining that comes back within weeks of cleaning
Visible gaps, cupping, or splitting boards across more than a small section
A ledger board (where the deck meets the house) that looks discolored or feels soft when pressed
Railings or posts that flex or wiggle more than they used to
A deck original to a home built more than 15-20 years ago with untreated or standard framing lumber

Any one of these on its own might be repairable. Two or more together, especially involving the framing or ledger, usually means the deck has reached the point where replacement is the more honest recommendation — repairs on a failing structure just move the problem, they don't solve it.

What a Correct Deck Replacement Actually Involves

It Starts Below the Boards, Not On Top of Them

The decking material is the part everyone notices, but it's the last thing we install, not the first thing that matters. A correct replacement starts with the framing: joists, beams, posts, and footings sized and spaced for the actual load the deck will carry, and connected with fasteners and hardware rated for exterior, coastal exposure. In a salt-air environment, that means stainless steel or heavy hot-dip galvanized hardware — not the standard-grade connectors that are fine 50 miles inland but corrode visibly within a few seasons here.

Ledger Attachment and Flashing

Where the deck attaches to the house is the single most common failure point we find on older decks, and it's almost always a flashing problem, not a lumber problem. Water gets behind an improperly flashed ledger board and rots the rim joist or sheathing behind it, sometimes for years, before it shows up as a soft spot. A correct replacement uses proper step flashing and a water-resistant barrier between the ledger and the house, so driving rain off the water can't work its way behind the connection.

Fasteners and Hardware

Every screw, joist hanger, and structural bolt on a coastal deck should be chosen for that environment specifically. This is one of the easiest things to get wrong and the hardest thing for a homeowner to check after the fact, since most of it ends up hidden under the decking. We spec stainless or coated fasteners rated for treated lumber and marine exposure as a standard, not an upgrade.

Choosing a Decking Material for Island Conditions

There's no single "best" decking material — there's a best material for a given budget, maintenance appetite, and how exposed the deck is to salt spray and standing moisture. Here's how the common options actually compare in this climate:

Material	Upfront Cost	Maintenance	How It Handles Salt Air & Moisture
Pressure-treated wood	Lowest	Annual cleaning, periodic sealing/staining	Needs consistent upkeep to resist moss and moisture; fasteners and flashing matter even more here
Cedar	Moderate	Regular sealing to hold color and resist moisture	Naturally moisture-resistant but still needs maintenance in a wet, salty climate to avoid graying and moss
Composite decking	Higher	Low — periodic washing, no sealing/staining	Resists rot and insect damage well; surface can still support moss growth if it stays damp, so airflow underneath matters
PVC/capped composite	Highest	Lowest — occasional washing only	Most resistant to moisture absorption and staining; best option where salt spray and shade combine to keep a deck damp

For decks with heavy shade, limited airflow underneath, or direct salt spray exposure, we usually steer homeowners toward composite or capped-composite boards, simply because the maintenance burden of wood in those conditions is real and ongoing. For decks in more open, sunnier spots with good drainage, a well-maintained wood deck can still make sense and cost less up front. We'll walk through the honest trade-offs for your specific site rather than push one material as a default.

Our Deck Replacement Process

On-site assessment. We inspect the existing deck, ledger connection, and any accessible framing to determine what's actually failing and why, not just what's visible.
Straightforward estimate. You get a clear scope and price before any work starts — what's being removed, what's being rebuilt, and what materials are being used and why.
Removal. The old decking, and any framing that doesn't meet current structural or moisture standards, comes out. We don't rebuild on top of compromised framing to save a step.
Framing and flashing. New joists, posts, and ledger flashing go in to current standards, sized for the deck's actual use and built with coastal-rated hardware throughout.
Decking installation. Boards are installed per manufacturer spec (fastener pattern, gapping, and ventilation matter for warranty coverage on composite and PVC products).
Railings and final details. Railings, stairs, and any trim are installed and checked for solid attachment.
Walkthrough. We go over the finished deck with you, including any care specific to the material you chose.

Permits and Island Logistics

San Juan County requires permits for most deck construction and replacement work, particularly when framing, footings, or railings are involved — the specifics depend on the deck's size, height, and location relative to setbacks. We handle that process as part of the job rather than leaving it to the homeowner to sort out.

Material delivery is also a genuinely different logistical problem on the islands than it is on the mainland. Lumber, hardware, and composite decking all have to move on a ferry schedule, which means a deck replacement here needs more lead time built into the plan than the same job would take in a mainland town. We build that reality into our scheduling up front so it doesn't turn into a surprise delay mid-project.

Keeping a New Deck Looking Right in a Long Moss Season

Even a well-built deck needs a little seasonal attention in this climate. A few habits go a long way toward protecting the investment:

Sweep or blow off leaves and debris regularly, especially in fall, so moisture doesn't sit trapped against the boards
Rinse salt residue off railings and decking periodically, particularly after storms with wind off the water
Keep gutters and downspouts clear so runoff isn't draining directly onto or under the deck
Check that any plantings or shrubs near the deck aren't blocking airflow underneath
For wood decks, plan on resealing on the schedule the product calls for — skipping a cycle is when moss and graying take hold

Why Hire a Crew That Already Works Friday Harbor

A lot of what separates a deck that lasts from one that needs rework in five years isn't the brand of decking board — it's whether the crew building it understands the specific conditions of this island environment. That means knowing which fasteners actually hold up to salt air over time, how to flash a ledger against wind-driven rain rather than just vertical rain, and how to plan a project around ferry-dependent material delivery instead of getting caught mid-job waiting on a shipment. It also means being familiar with San Juan County's permitting process so that part of the job doesn't stall the rest of it.

We work throughout Orcas Island and the surrounding San Juan County community, including Friday Harbor, and we build every deck to the same coastal standard regardless of how exposed a particular site is — because conditions on this stretch of water don't give a deck much room for shortcuts.

Get a Straightforward Deck Replacement Estimate

If your deck is showing soft spots, persistent moss, or corroded hardware, it's worth getting an honest look before deciding between repair and replacement. We offer free, no-pressure estimates for Friday Harbor homeowners — use the form below to get started.

Deck Replacement for Friday Harbor Homes