Why Your Deck Dies in 2 Years (And Sneaky Contractors Won't Say Why)

7 Deck-Building Mistakes That Rot Your Deck in 2 Years (Even With Pressure-Treated Wood) This deck looks fine. Two years old, still holding up a grill and patio chairs, boards feel solid underfoot. But underneath, the ledger wood is black, the joist ends are soft enough to push a thumb through, and the corner post has been wicking water since the day it was set. The problem isn't bad wood, bad weather, or bad luck. It's decisions made in the first three days of the build that almost every crew makes — and by the time you notice, the repair bill is 3-4x what it would've cost to do it right the first time. In this video, I break down the 7 most common deck-building mistakes, all rooted in one cause: water trapped with nowhere to go. 🔨 Ledger flashing skipped or faked with caulk — the mistake that rots your house, not just the deck 🔨 Field-cut joist ends left unsealed, exposing untreated wood at the core 🔨 Deck boards laid with no gap, trapping wet debris against the edges 🔨 Joists set flat on beams with no flashing tape — where the worst rot hides 🔨 Post bases sitting in wet concrete, wicking water up through the end grain 🔨 Fasteners that don't match ACQ-treated lumber, causing galvanic corrosion from the inside out 🔨 Missing drip edges and kickout flashing, letting water creep backward into the structure By the end, you'll know how to walk under any deck — yours, a friend's, or one on a house you're about to buy — and tell within 30 seconds whether it's built to last or already failing. ⚠️ Disclaimer: This video is for general educational purposes and is not a substitute for a professional structural inspection. If you suspect serious rot or structural damage, consult a licensed contractor or inspector. 🔔 Subscribe — new videos every week on the hidden mistakes that quietly cost homeowners thousands. 💬 Comment below: which of these have you found on your own deck? 👉 Coming next: the same breakdown for fence posts and shed floor framing. #DeckBuilding #HomeImprovement #DIY #HomeMaintenance #Woodworking #HomeRepair