How long does a full deck replacement typically take?

Most residential deck replacements take a few days to about two weeks, depending on size, whether framing or footings need repair, and permit or inspection scheduling. Weather can add delays given how much rain this area gets outside the summer months. We give a realistic timeline once we've seen the existing structure, not before.

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

Ask whether they pull permits themselves, what they check below the decking surface before quoting, and whether they'll put the scope of work in writing rather than a vague estimate. Ask about their warranty terms and whether they're familiar with the permit process for your specific jurisdiction, since it differs between Whatcom County and BC municipalities. A contractor who can't answer those clearly is worth a second look.

Is composite or PVC decking worth the extra cost over wood in this climate?

It depends on how much annual maintenance you're willing to do. Wood costs less upfront but needs regular cleaning and sealing to hold up against this much rain and moss, while composite and PVC cost more initially but need far less upkeep and resist moisture damage better over the long run. We'll go over the real trade-offs for your specific deck rather than push one option.

What kind of fasteners and hardware should be used on a deck replacement here?

Fasteners and connectors need to be rated for exterior and treated-lumber contact — typically hot-dip galvanized or stainless hardware — since standard fasteners corrode and stain within a couple of wet seasons in this climate. Post-to-footing and ledger connections also need hardware that won't trap moisture against the wood. Using the right hardware here matters as much as the decking material itself.

Do permit requirements really differ between Lynden and Aldergrove even though they're so close together?

Yes. Whatcom County and Langley Township have different permit thresholds, code references, and inspection processes, even though the two communities sit just a few minutes apart across the border. Deck height, whether it's attached to the house, and local setback rules all factor into what's required. We confirm the actual requirements for your property before starting rather than assuming one side's rules apply to the other.

Aldergrove, BC Deck Replacement Built for Border Country Weather

Why Decks Near the Border Wear Out Faster Than People Expect

Aldergrove sits just north of the line from Lynden, close enough that the same weather system that soaks Whatcom County is soaking your deck an hour later. Salt-tinged marine air, driving rain for a good chunk of the year, and a moss season that can run from October well into April are hard on any exterior structure — but a deck takes it worse than siding or a roof because it's horizontal. Water doesn't run off a deck surface the way it sheds off a wall. It sits, soaks into end grain, pools against fasteners, and works its way into every joint that wasn't detailed correctly the first time.

Most decks in this area don't fail because the wood or composite itself gave out — they fail because water got somewhere it shouldn't have and nobody caught it until the damage was structural. That's the difference between a deck that needs a few boards swapped and one that needs a full replacement.

Repair or Replace? How to Tell the Difference

Board-level rot, a wobbly rail, or a couple of popped screws are repair jobs. Full replacement is the right call when the problem has moved past the surface and into the frame — the ledger board, the joists, the posts, or the footings. Once moisture has been sitting in those members for a season or two in this climate, patching around it just buys a little time before the same failure shows up somewhere else on the same deck.

Structural warning signs worth a real inspection

Bounce or give when you walk across the deck, visible daylight or gaps where the ledger board meets the house, soft spots you can push a screwdriver into, and rust streaking down from fastener heads are all signs the frame — not just the decking — is compromised.

What a Proper Deck Replacement Actually Involves

"Deck replacement" gets used loosely. Done right, it's a full tear-out and rebuild, not a resurfacing job with new boards laid over an old frame.

Below the decking

This is the part homeowners never see again once it's covered up, which is exactly why it has to be done right the first time. That means removing decking down to the frame, checking every joist and beam for rot or insect damage, replacing anything questionable, and re-flashing the ledger board where it attaches to the house — the single most common source of hidden water damage on decks in this climate. Footings get checked for frost heave and settling, and any that are undersized or cracked get addressed before new structure goes on top of them.

At and above the decking surface

New joist tape over the framing to keep water off the wood, corrosion-resistant fasteners rated for exterior and treated-lumber contact, correctly spaced decking with drainage gaps that won't trap standing water, and railings and stairs built or rebuilt to current code — guard height, baluster spacing, and stair rise/run all get checked, not assumed to match the old deck.

Decking Material Options for This Climate

There's no single "best" material — there's a best fit for your budget, how much upkeep you're willing to do, and how the deck sits relative to sun, shade, and drainage.

Material	Upfront Cost	Maintenance in Wet Climate	Typical Lifespan Here
Pressure-treated wood	Lowest	Annual cleaning and re-sealing; moss and mildew show fast if skipped	10–15 years with upkeep
Cedar	Moderate	Needs regular sealing to hold color and resist checking; sheds moisture better than PT if maintained	15–20 years with upkeep
Capped composite	Higher	Occasional wash-down; won't rot but surface moss/algae still needs cleaning	25–30+ years
PVC	Highest	Lowest ongoing maintenance; fully moisture-resistant core	25–30+ years

We'll walk you through the honest trade-offs for your situation rather than push whatever has the best margin — a shaded, north-facing deck that never fully dries out behaves very differently than one that gets full sun most of the day, regardless of what material sits on it.

The Failure Points We Watch For Specifically

Given the amount of rain and the length of the moss season here, a few details get extra attention on every deck we replace in this area:

Ledger board flashing — the joint where the deck meets the house is the single most common leak point; it gets proper flashing and a gap for drainage, not just caulk.
Fastener corrosion — hardware rated for ground-contact and treated-lumber contact, since the wrong screw or nail corrodes and stains within a couple of wet seasons.
Under-deck drainage — grading and airflow under the structure so water doesn't pool against posts and footings.
Moss and algae buildup — a surface issue on any material, but on wood it also holds moisture against the boards, so gap spacing and orientation matter more than people assume.
Post-to-footing connections — checked and upgraded to hardware that won't trap water against end grain.

Permits and Code on Either Side of the Border

Aldergrove and Lynden are close enough geographically that homeowners sometimes assume the rules are the same — they aren't. Requirements for permits, guard height, footing depth, and inspections differ between Whatcom County and Langley Township, and building code references aren't identical across the border. Deck height above grade, whether the structure is attached or freestanding, and local setback rules all affect whether a permit is required and what an inspector will be checking for. Part of doing this correctly is confirming what actually applies to your property before work starts, rather than assuming a spec that works on one side of the line automatically works on the other.

How We Handle a Deck Replacement

On-site assessment — we look at the existing frame, footings, and ledger connection, not just the surface, before quoting anything.
Written estimate — scope, material options, and a clear number, with the trade-offs explained rather than glossed over.
Permit confirmation — we determine what's required for your specific property and jurisdiction before demo starts.
Full tear-out — old decking, railings, and any compromised framing removed down to sound structure.
Frame and footing repair or replacement — addressed before anything new goes on top.
Rebuild — flashing, joist tape, framing, decking, railings, and stairs installed to current code.
Final walkthrough — we go over the finished deck with you, including what maintenance it will and won't need.

What Moves the Price

Deck replacement costs vary enough between projects that a number without context isn't useful. These are the factors that actually drive the estimate:

Factor	How It Affects Cost
Deck size and footprint	Larger square footage means more material and labor, straightforwardly
Condition of the existing frame	Rotted joists, a failing ledger board, or bad footings add repair scope you can't see until tear-out
Material choice	Pressure-treated wood runs lowest upfront; composite and PVC cost more but need less upkeep over time
Railings and stairs	Multi-level decks or long stair runs add framing and code compliance work
Permit and inspection requirements	Varies by jurisdiction and can add time and fees to the timeline
Site access	Tight lots or decks over sloped ground can add labor for material handling and equipment

Signs Your Deck Is Due for Replacement

Boards feel spongy or soft underfoot, especially near the house or around posts
Visible gap or separation where the deck meets the exterior wall
Rust staining running down from fastener heads
Noticeable bounce, sway, or movement when several people are on it
Moss or algae that comes back within weeks of cleaning
Posts or footings that look sunken, cracked, or shifted

If you're only seeing one or two of these, a repair may still make sense. If several apply at once, it usually means the frame — not just the surface — has been compromised for a while.

Why a Local Crew Matters More Than It Sounds Like It Should

A deck replacement crew that already works the Lynden–Aldergrove corridor isn't guessing at how this climate treats a deck over its first few winters — they've seen it happen on other decks nearby and know which details actually matter here versus which ones are just upsells. That includes knowing the permit process on both sides of the border, not treating every ledger board flashing detail as optional, and being close enough to come back for a warranty check or a quick question without it being a special trip. For a project that has to hold up against this much rain and this long a moss season, that familiarity shows up in how the deck performs five and ten years out, not just on installation day.

If your deck is showing any of the signs above, or you just want a straight answer on whether it needs repair or full replacement, we're happy to take a look. Fill out the form below for a free, no-pressure estimate.