Building Decks That Hold Up in Old Town Anacortes
Old Town Anacortes sits close to the water on Fidalgo Island, and that location shapes everything about how a deck needs to be built here. Salt-laden air off the Guemes Channel and Rosario Strait accelerates corrosion on hardware and fasteners. Driving rain off Puget Sound finds every gap in flashing and framing. And the long stretch of gray, wet months each year gives moss and algae plenty of time to take hold on any surface that doesn't shed water well. A deck built to a generic spec sheet will show its age fast in this neighborhood. A deck built for these specific conditions will still be solid and safe a couple decades from now.
This page is about custom deck construction specifically for homes in and around Old Town Anacortes — what the local climate demands, what a correctly built deck actually involves, and how we approach the work so it lasts.

What the Local Climate Does to a Deck
Salt Air and Metal Fatigue
Anacortes' proximity to saltwater means airborne salt reaches structures well beyond the immediate shoreline. Over time, salt exposure corrodes standard fasteners, hangers, and hidden hardware faster than it would inland. A deck built with the wrong grade of hardware can develop hidden structural weaknesses at connection points years before the visible decking shows any wear — which is one of the more dangerous failure patterns in coastal deck construction, because the surface can look fine while the framing underneath is compromised.
Driving Rain and Water Intrusion
Wind-driven rain off the Sound doesn't just fall straight down — it gets pushed sideways into ledger connections, stair stringers, and any spot where the deck meets the house. Poor flashing at the ledger board is one of the most common causes of rot and, in worst cases, deck collapse, because water gets behind the siding and into the rim joist without ever being visible from outside.
Moss, Algae, and a Long Wet Season
Western Washington's wet season runs long, and shaded or north-facing decks in Old Town Anacortes can stay damp for weeks at a stretch. That moisture, combined with organic debris from surrounding trees, is exactly what moss and algae need to take hold. Beyond looking bad, moss holds moisture against the deck surface and makes boards slippery — a real fall hazard on stairs and landings.
What a Correctly Built Deck for This Neighborhood Involves
- Proper ledger flashing — a code-compliant flashing detail (not just caulk) at every point the deck attaches to the house, so water is directed away from the rim joist rather than trapped behind it.
- Corrosion-resistant hardware throughout — hangers, structural screws, and post connectors rated for coastal or treated-lumber exposure, not standard interior-grade fasteners.
- Footings set to local frost and soil requirements — Anacortes soil varies block to block, and footing depth needs to match both code and what's actually under the yard.
- Air gap and drainage under the decking — enough ventilation beneath the boards that the structure can dry out between rain events instead of staying damp for days.
- Surface material chosen for slip resistance and moss shedding, especially on stairs, shaded landings, and any area under tree cover.
- Guardrails and stair railings built to current code — height, baluster spacing, and grip requirements matter for both safety and passing inspection.
Choosing Materials for a Coastal, Wet Climate
There's no single "best" decking material for every home — it depends on budget, how much upkeep you want to take on, and how exposed the deck is to weather. Here's how the common options actually perform in Old Town Anacortes conditions:
| Material | Salt Air Performance | Moss/Algae Resistance | Maintenance |
|---|---|---|---|
| Pressure-treated wood | Good with proper fasteners; wood itself is stable, hardware is the weak point | Needs regular cleaning and sealing to resist buildup | Annual cleaning, re-staining every 2-3 years |
| Cedar | Naturally rot-resistant, but fasteners still need to be corrosion-rated | Moderate — still needs periodic cleaning | Regular sealing to preserve color and resist moisture |
| Capped composite | Excellent — shell resists salt and moisture intrusion | Good — smoother surface sheds moss more easily than wood | Occasional washing, no staining or sealing |
| Uncapped/basic composite | Fair — more prone to moisture absorption at cut edges | Fair — porous surface can hold organic buildup | More frequent cleaning than capped composite |
We'll walk through these trade-offs honestly during your estimate — including where a lower-maintenance material makes sense versus where traditional wood fits the look of an older Old Town home better.
Our Process for a Custom Deck Build
1. On-Site Assessment
We look at your home's specific exposure — how much direct weather it gets, existing drainage patterns in the yard, tree cover, and how the deck will connect to the house. Every lot in Old Town Anacortes sits a little differently relative to wind and water.
2. Design and Material Selection
We talk through layout, material, and railing style based on how you'll actually use the space, your budget, and how much maintenance you want long-term.
3. Permitting
Most new decks and many substantial rebuilds require a permit through the City of Anacortes or Skagit County, depending on your property's location. We handle the permit application and coordinate inspections so you don't have to navigate that process yourself.
4. Construction
Framing, flashing, and hardware go in first and get inspected before any decking goes down — this is the part that determines whether the deck lasts 10 years or 30. Surface decking, railings, and finishing details come last.
5. Final Walkthrough
We go over the finished deck with you, including basic care specific to the material you chose, before calling the job complete.
Common Problems We Find on Older Old Town Decks
A lot of our deck work in this neighborhood is replacement or major rebuild, not new construction, because Old Town Anacortes has a good number of established homes with aging decks. The issues we run into most often:
- Ledger boards attached with no flashing, or flashing that's failed after years of driving rain
- Standard (non-coated) fasteners showing significant corrosion in structural connections
- Post footings that were never properly set below grade, causing movement over time
- Railings that don't meet current guardrail height or baluster spacing requirements
- Moss buildup that's been painted or sealed over instead of cleaned, trapping moisture underneath
If your deck is more than 15-20 years old and hasn't had the framing inspected recently, it's worth having someone look at what's underneath the surface boards — that's where coastal weather does its real damage.
Permits and Code Considerations
Deck permitting in Anacortes and unincorporated Skagit County covers structural requirements — footing depth, ledger attachment, guardrail height, and stair geometry — as well as setback rules that vary by lot. Older Old Town properties sometimes have non-standard lot lines or easements that affect what's buildable, so this is worth confirming early rather than after a design is finalized. We manage the permit process as part of every project so the deck is built to what actually passes inspection, not just what looks right.
Keeping Your New Deck in Good Shape
- Sweep debris (leaves, needles, moss spores) off the deck surface regularly, especially in fall and winter
- Rinse the deck a few times a year to prevent algae and moss from establishing, particularly in shaded areas
- Check railings and stair connections annually for looseness
- Keep gutters and downspouts near the deck clear so water isn't dumping directly onto or under it
- Re-seal or re-stain wood decking on the schedule appropriate to the product — don't wait until it's visibly graying
- Trim back overhanging branches to reduce shade, debris, and moss pressure on the deck surface
Why Local Experience Matters for This Job
Deck building isn't the same job everywhere. A crew that mostly works drier inland climates can build something structurally sound on paper that still fails early here, because they're not thinking about salt air corrosion or wind-driven rain at the ledger. Working regularly in Old Town Anacortes and the surrounding Skagit County area means we've already seen how local weather, soil, and older home construction interact with a deck over time — and we build accordingly, rather than learning it on your project.
If you're planning a new deck or need to replace one that's showing its age, we're happy to take a look and put together a straightforward, no-pressure estimate. Fill out the form below and we'll get in touch to schedule a time to see your property.
Anacortes Siding