Signs Your Deck or Porch Needs Repair

A deck collapse is one of the most preventable home accidents. The warning signs are visible months — sometimes years — in advance.

Check the ledger board

The ledger is where the deck attaches to the house. It should be bolted (not nailed) through the rim joist with proper flashing above it. Soft wood, rust streaks, or visible nails instead of bolts are red flags.

Probe the posts

Use a screwdriver to push into posts at ground level. If it sinks in, you have rot. Posts should sit on concrete piers, not directly in soil.

Wiggle the railings

Lean into the rail with your hip. Any flex means loose fasteners or rotted blocking. Code is 200 pounds of lateral force.

Look under the boards

Joists should be straight and dry. Black stains, soft spots, or insect tunneling mean replacement, not repair.

Inspect the fasteners

Older decks used galvanized nails that corrode with modern pressure-treated lumber. If you see rust at every nail head, the structure is being eaten from the inside.

Walk the surface

Cupped, splintered, or springy boards are surface issues. A board that moves when you step on it is a structural one.

When to call us

If you find rot in any structural member — post, beam, ledger, or joist — stop using the deck until it's evaluated. Replacing one bad board is cheap. A collapse is not.