How long does building a typical deck take from start to finish?

Most residential decks take one to three weeks once permits are approved, depending on size, material, and how much custom framing or stairs the design calls for. Weather can push the timeline in Whatcom County's wetter months, especially for footing and framing work. We build the schedule around your specific project rather than quoting a one-size timeline.

What should I ask a contractor before hiring them to build a deck?

Ask whether they pull permits themselves, what fastener and flashing standards they use, and whether they'll walk you through material trade-offs rather than just pushing one product. Ask to see how they detail ledger flashing specifically, since that's the most common failure point on older decks. A contractor who can explain their process in plain terms, not just show photos, is usually the safer bet.

What's the real difference between capped composite decking and PVC decking?

Capped composite has a wood-fiber core wrapped in a protective plastic shell, while PVC decking is fully synthetic with no wood content at all. PVC tends to resist moisture and moss slightly better in heavily shaded, damp spots, while capped composite often costs less and still performs very well when detailing at cut edges and fasteners is done correctly. Both are strong upgrades over uncapped, budget composite boards.

Does cedar decking need to be sealed every year in this climate?

Cedar has natural moisture and insect resistance, but that resistance fades once the wood is exposed to Whatcom County's rain and humidity without upkeep. We generally recommend oiling or sealing cedar decking annually to keep it performing the way it's supposed to. Skipping a year or two doesn't ruin it, but it does shorten the deck's usable life.

Is Kendall's climate actually different from Sumas or other parts of Whatcom County for outdoor building?

The core climate factors — heavy rain, humidity, and a long moss season — are shared across Whatcom County, but Kendall's tree cover and more rural, sloped lots often mean more shade and slower drying than open lots closer to town. That combination makes moisture detailing and moss-resistant material choices even more important. It's a difference in degree, not in kind, and it's worth factoring into material choice and drainage detailing.

Deck Building in Kendall, WA: What Holds Up Here

Building a Deck That Actually Holds Up in Kendall

Kendall sits in the wooded, semi-rural stretch of Whatcom County between Sumas and the Mt. Baker foothills, and that setting shapes what a deck out here has to survive. Tree cover keeps decks shaded and damp longer than in open subdivisions closer to town. Long stretches of driving rain, a marine-influenced climate that carries salt air inland on windy days, and a moss season that can run from October through May all put real stress on wood, fasteners, and footings. A deck built to a generic spec sheet often looks fine the first summer and starts showing problems — soft boards, rust streaks, slick green film, a wobble in the railing — within a few wet seasons. A deck built for this specific climate doesn't.

What Kendall's Weather Does to an Outdoor Deck

Rain and Standing Moisture

Whatcom County gets a lot of rain, but volume isn't the only issue — it's how long surfaces stay wet. Under tree canopy, decks in Kendall can stay damp for days after a storm passes, especially on the north or shaded side of a house. Any spot where water can't drain or dry out — tight board spacing, a ledger board without proper flashing, a post base sitting in a puddle — becomes the place where rot starts first.

Moss, Algae, and a Long Growing Season

Moss doesn't care how good your decking material is if the surface underneath stays wet and shaded. Once spores take hold in the grain of wood decking or in the texture of some composite boards, they spread fast in a mild, damp Whatcom County winter. Beyond looking bad, a mossy deck surface gets genuinely slick — a real slip hazard on stairs and ramps, which matters more on a property with any grade change, common on Kendall's rural lots.

Salt Air and Metal Fasteners

Even away from the immediate coastline, Pacific Northwest weather systems carry a degree of salt-laden moisture inland, and it accelerates corrosion in fasteners, brackets, and hardware that aren't rated for it. A deck held together with standard hardware instead of coated or stainless fasteners will show rust streaks down the face of the boards well before the structure itself is actually failing — and once fasteners start corroding, the structural connection is weakening too, not just the appearance.

Choosing the Right Decking Material for This Climate

There's no single "best" decking material — there's a best fit for your budget, your maintenance appetite, and how much shade and moisture your particular lot deals with. Here's how the common options actually perform in a Whatcom County climate like Kendall's:

Material	Moisture/Moss Behavior	Maintenance	Typical Lifespan
Pressure-treated pine	Absorbs moisture readily; needs good airflow underneath or it holds water at the joists	Re-seal or stain every 1–2 years; scrub moss seasonally	15–20 years with upkeep
Cedar	Naturally moisture- and insect-resistant, but the surface still grows moss if kept wet and shaded	Oil/seal annually to keep natural resistance active	20–25 years with upkeep
Composite (capped)	Doesn't rot, but can still grow surface algae/moss film in deep shade	Occasional wash; no staining or sealing	25–30+ years
PVC decking	Fully moisture-resistant surface; least hospitable to moss of the common options	Occasional wash	30+ years

For heavily shaded Kendall lots specifically, we tend to steer homeowners away from uncapped, budget composite boards — the wood-flour core in some of those products can wick moisture at cut edges and fastener holes if the capping isn't consistent, which shows up as swelling or dark staining a few years in. That's a maintenance and warranty trade-off worth knowing before you buy, not a reason to avoid composite decking as a category — capped composite and PVC both perform well here when detailed correctly.

What a Correctly Built Deck Involves

The parts of a deck nobody sees are the parts that determine whether it's still solid in fifteen years. For this climate, that means:

Footings set below frost depth and sized to the soil conditions on your specific lot — Kendall's mix of clay and forest soils doesn't drain the same everywhere.
Ledger board flashing done correctly where the deck attaches to the house, so water is shed away from the structure instead of wicking into the rim joist — this is the single most common failure point we see on older decks in this area.
Joist tape or flashing on top of every joist to keep fasteners from sitting in a moisture trap.
Board spacing wide enough for real drainage and airflow, not just tight for looks.
Corrosion-resistant fasteners and hardware rated for ground contact and coastal-influenced moisture, not standard interior-grade hardware.
Post bases that keep wood off the ground and away from standing water, with gravel or proper drainage underneath.
Guardrails and stair framing built to current code load requirements, not just "sturdy enough."

Permits and Code in Whatcom County

Most raised decks in Whatcom County require a building permit, and the threshold depends on height above grade and whether the deck attaches to the house. Guardrail height, baluster spacing, and stair geometry are all governed by code, not preference — this matters most on Kendall properties with sloped lots, where a deck can end up higher off the ground than it looks from the plans. We handle the permit process as part of the job rather than leaving it to the homeowner, because a deck built without the required permit can complicate things later at resale or with insurance.

Our Deck Building Process

On-site assessment — we look at your lot's drainage, tree cover, sun exposure, and how the deck will tie into the house before recommending a material.
Design and material selection — sized and specced to your budget and how much upkeep you actually want to do long-term.
Permit handling — drawings and applications filed with the county where required.
Footings and framing — built to the depth and spacing this soil and climate call for, not the bare code minimum.
Flashing and moisture detailing — ledger, joists, and post bases done to keep water moving away from wood and hardware.
Decking, railing, and stairs installed — with fastening and spacing set for drainage and long-term stability.
Final walkthrough — we go over basic maintenance specific to your material before we consider the job done.

Maintenance That Actually Matters Here

Every deck material needs some upkeep in this climate — the difference is how much and how often. A simple seasonal routine keeps most Kendall decks looking and performing well for years:

Sweep debris and fallen leaves off the surface regularly, especially in fall — trapped organic matter is what feeds moss growth.
Scrub visible moss and algae with a deck-safe cleaner before it gets a foothold, rather than waiting until it's thick.
Check that gaps between boards are clear so water can actually drain through.
Inspect ledger flashing and post bases once a year for any sign of water pooling or wood darkening.
Re-seal or re-stain wood decking on the schedule its finish calls for — don't stretch it because it "still looks okay."
Look over railings and stair connections for movement or rust streaks at fastener heads.

Why Hiring a Local Crew Matters

A deck built to a spec sheet written for a dry climate doesn't hold up the same way out here. Crews who already work in Kendall and the surrounding Sumas area know which details actually matter for this specific mix of rain, shade, and moss pressure — not from a manual, but from having gone back to fix decks that were built without them. That local experience shows up in the flashing details, the fastener choices, and the material recommendations we give, and it's the difference between a deck that needs real repair in eight years and one that's still solid at twenty-five.

What a Project Typically Costs

Deck costs vary widely based on size, height off the ground, material, and how much custom framing or stair work is involved. As a rough, honest range: a straightforward ground-level deck in pressure-treated lumber generally runs lower per square foot than a raised composite or PVC deck with railings and multiple stair sets — material alone can more than double the cost per square foot between the cheapest and most premium options. The only way to get a number that means anything for your project is a look at your actual lot and a real conversation about what you want out of the space.

If you're planning a new deck or replacing one that's showing its age, we're happy to come take a look and give you a straightforward, no-pressure estimate — just fill out the form below.