More decks fail in summer than in all other seasons combined — and most owners never see it coming.
The Summer Stat Most North Carolina Buyers Have Never Heard
Here is a number that should give every home buyer pause: more decks collapse during the summer than in all other seasons combined. It makes grim sense. Summer is when decks carry their heaviest loads — a Fourth of July cookout, a graduation party, a dozen people gathered along one railing to watch the sunset over the Cape Fear River.
The risk is not rare. Between 2020 and 2024, roughly 8,700 people were injured and two were killed in the U.S. when decks, porches, or balconies gave way. There are an estimated 60 million decks nationwide, and industry groups believe close to half of them are past their useful service life. In a state like North Carolina — where outdoor living runs from April through October and nearly every home from Raleigh to Wilmington has a deck or screened porch — the odds that the home you’re about to buy has a problem are higher than you’d think.
The hard part is that a failing deck rarely looks dangerous. It can hold for years, then let go on the one afternoon it matters most.
What Actually Causes a Deck to Fail
When a deck pulls away from a house, the culprit is almost always the same. About 90% of deck collapses happen when the ledger board — the horizontal board that fastens the deck to the house — separates from the structure. When that connection fails, the whole deck swings away from the wall like a trap door.
A few specific weaknesses cause most of the trouble:
- The ledger is nailed instead of bolted. Nails work loose over time. Code requires lag screws or through-bolts, but older and DIY decks are often simply nailed on.
- There’s no flashing behind the ledger. Without metal flashing to shed water, rain runs straight into the band joist of the house and quietly rots the wood the deck is bolted to.
- The wood has rotted from the inside. In coastal North Carolina, where summer humidity averages around 75%, wood absorbs moisture, swells, and decays — often hidden behind siding where no one can see it.
Salt air along the Crystal Coast and the beaches near Wilmington and Jacksonville accelerates all of this. A pressure-treated deck inland might go three years between sealings; near the ocean it may need attention every one to two years just to stay ahead of rot.
What a Buyer Should Do Before Closing
If you’re buying a home with a deck this summer, do not assume it’s sound because it looks solid. Have it evaluated as part of your home inspection. Walk it yourself first, too: bounce gently in the middle, look for wobble in the railings, and check for dark vertical streaks on the siding below the deck — a telltale sign of water getting behind the ledger.
If the deck is more than 15 years old, was clearly added by a previous owner, or sits over a walk-out basement or a drop to the yard, treat it as a priority item in your inspection, not an afterthought.
What FPI Checks on Every Deck
When we inspect a deck, we go past the surface boards most people focus on. We probe the rim joist behind the ledger with a tool, feeling for soft, “punky” wood that signals hidden rot. We confirm the ledger is bolted — not nailed — and look for proper flashing at the wall. We check post-to-beam and beam-to-joist connections, railing height and sturdiness, stair stringers, and footings for movement or settling. On coastal properties, we pay special attention to corrosion on fasteners and connectors, which salt air eats through faster than most owners expect.
It’s the kind of structural detail that’s easy to miss and expensive to ignore — exactly the sort of thing a thorough inspection is built to catch.
For Agents
Decks are one of the most common — and most negotiable — findings in a summer transaction, and they’re worth getting ahead of. If you’re listing a home with an older or owner-built deck, suggest a pre-listing inspection so any structural issue surfaces on your timeline rather than the buyer’s. It’s far easier to repair a ledger connection before photos go up than to renegotiate after an inspection report lands mid-deal.
On the buy side, set expectations early. Many buyers assume a deck is “just cosmetic,” so a structural finding can feel like a deal-breaker when it’s often a straightforward, quantifiable repair. Having a clear inspection report — with photos of the ledger, flashing, and any rot — turns an emotional surprise into a simple line item both sides can negotiate around. It also protects you and your client: a deck that fails after closing is exactly the kind of thing nobody wants to litigate.
Inspect It Before You Trust It
A deck is the one part of a home you’ll fill with the people you care about most. Before you do, make sure it can carry them. Focused Property Inspections serves Raleigh, Fayetteville, Jacksonville, and Wilmington with thorough, detail-driven inspections and same-day reports — so you know exactly what you’re standing on before you close.
Schedule your inspection today.
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