Maintenance Guides · 6 min read
How to Make a Deck Last 25 Years in New Jersey
Most New Jersey decks die at 15 years. The frame could have lasted 30 — what kills them early is water sitting where it shouldn't, and small failures nobody caught. Here's the maintenance rhythm we recommend to every deck client.
The yearly inspection (15 minutes, every spring)
Walk the deck once a year with a screwdriver. Press it into the ledger board (where the deck meets the house), the post bases, and the stair stringers. Solid wood resists; rot gives. The ledger is the connection that fails catastrophically, so it gets checked first.
- Probe the ledger board and flashing for soft spots
- Grab every railing section and push — movement means loose or corroded fasteners
- Look under the deck for water staining on joists
- Check post bases for flaring, cracking, or contact with soil
- Confirm stair treads don't flex more than they did last year
Wash every year, seal every two to three
Algae and mildew hold moisture against the wood — that's why north-facing deck boards rot first. An annual wash (gentle pressure or soft wash, never full pressure on soft wood) stops the growth cycle.
Wood decks need sealing every two to three years. The test: sprinkle water on a board. If it beads, you're protected; if it soaks in flat, the wood is drinking rain all season. Seal in late spring after a dry stretch.
What to fix immediately, not eventually
Three things should never wait a season: a railing that moves, a soft stair tread, and any gap opening between the deck and the house. The first two are how injuries happen. The third means water is getting behind the ledger — the failure mode that drops decks.
Everything else — a cracked board, a popped nail, faded stain — is a normal maintenance item that can be batched into a yearly visit.