In the Pacific Northwest, a deck that looks fine in March can be structurally compromised by June. Not because anything dramatic happened — but because our winters are long, wet, and relentless, and wood absorbs moisture in ways that aren't always visible from the surface.
According to the Consumer Product Safety Commission, more than 6,000 people are injured annually in deck-related incidents in the U.S. [1] The North American Deck and Railing Association (NADRA) reports that 90% of deck collapses result from ledger board connection failures — the point where the deck attaches to the house. [2] Most of these failures are preventable with a proper annual inspection.
The PNW Freeze-Thaw Problem
Vancouver, WA averages 42 inches of rain per year, with the bulk of it falling between October and April. [3] That sustained moisture works into deck fasteners, ledger connections, and post bases throughout the winter. Then we get the occasional freeze — and water that has infiltrated wood grain or fastener holes expands, widening the gap and accelerating deterioration.
By the time you're ready to use your deck in May, the damage from last winter is already done. The question is whether it's cosmetic or structural.
What to Check Before You Call a Contractor
- Ledger board: Look from below where the deck frame meets the house. Any dark staining, soft wood, or gaps in the flashing are red flags.
- Post bases: Check the metal hardware at the base of each post. Surface rust is normal; significant corrosion or separation from the post means the hardware needs replacement.
- Deck boards: Walk the deck and feel for soft spots, bounce, or boards that flex more than their neighbors. Surface checking (small cracks along the grain) is normal; soft or punky wood is not.
- Stair stringers: The diagonal framing under your stairs is the most moisture-exposed structural member on most decks. Press on it at the base where it meets the landing.
- Railing connections: Grab each post and apply lateral pressure. There should be no movement. A railing post that wobbles is a safety issue.
Our 360° Deck Assessment
Our 360° Method includes a structural deck assessment as part of every exterior evaluation. We check all of the above, photograph our findings, and give you a written report with repair priorities and estimated costs. No sales pressure — just information you can use to make a decision.
Free deck assessment — we'll tell you exactly what you're working with.