Alpine Exteriors
Siding · Bellingham, WA & Whatcom County

Deck Builders in Skagit County, WA

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25 Years in Business2,000+ Projects Completed25-Year Workmanship Warranty5-Star RatedLicensed & Insured

Deck Building Across the Skagit Valley

Skagit County asks more of a deck than almost anywhere in Washington, because the county contains three different climates. Anacortes decks live in salt air and near-constant marine wind. Valley decks around Mount Vernon and Burlington sit in river-bottom humidity that keeps untreated wood damp deep into summer. And up the valley toward Sedro-Woolley and the foothills, rainfall climbs sharply while shade from second-growth timber never really lets a north-facing deck dry out. Alpine Exteriors builds for all three, and the first thing we do on any project is read the site before we talk products.

We have been building exteriors for 25 years, and in that time the biggest lesson about Northwest decks has never changed: the surface board gets all the attention, but the frame determines the lifespan. So that is where our spec starts.

What we do

Alpine siding, roofing, windows & decking.

Built From the Footings Up

Whether the project is a view platform above the tulip flats, a waterfront deck near Similk Bay, or a straightforward replacement for a rotting builder-grade deck on a 1980s home in Burlington, the structure underneath follows the same rules.

  • Engineered footings matched to Skagit soils, which range from glacial till on the hillsides to soft valley silt that swallows undersized piers
  • Flashing tape over every joist, beam and rim, cutting off the trapped moisture that destroys pressure-treated framing years early
  • Stainless fasteners near the saltwater, coated structural hardware inland, selected per site rather than by habit
  • A ledger connection flashed into the siding correctly, protecting the house wall the deck attaches to

On the walking surface, valley humidity pushes many clients toward capped composite, which does not feed the moss and black algae that make cedar slick by midwinter here. We still build plenty of cedar decks, especially covered ones, and we finish them with penetrating oils that handle wet-dry cycling better than film-forming stains. Railings run from classic cedar to powder-coated aluminum with clear panels for owners who refuse to give up their view of the flats or the Cascades.

How a Project Starts

Everything begins with a free on-site estimate anywhere in the county. We look at drainage, sun angles, wind direction and how you actually want to use the space, then sketch a layout and deliver a firm written price with the framing specification in black and white. Comparing our bid to another becomes simple, because nothing is hidden in allowances.

The finished deck is covered by a 25-year workmanship warranty, which tells you how confidently we frame. And with more than 2,000 completed projects across northwest Washington, from island properties to farmhouse porches up the South Skagit Highway, we can nearly always show you one of our decks a short drive from your place, aged a decade or more and still dead solid underfoot.

Recent work

Craftsmanship you can see.

Free, no-pressure estimate

Ready to get started?

Tell us about your project and we'll follow up — usually the same day — to schedule a free on-site estimate anywhere in Whatcom, Skagit & Snohomish County.

(360) 543-4799

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