Inspect your deck before heavy seasonal use, after severe weather, and any time it feels loose, bouncy, or soft underfoot. Homeowners can spot warning signs, but structural concerns need a qualified deck contractor, inspector, or engineer.
Quick deck checklist
- Railings don't wobble.
- Stairs feel solid and even.
- Deck boards aren't soft, cracked, or lifting.
- Fasteners aren't missing, rusted through, or backing out.
- The deck isn't pulling away from the house.
- Posts and framing don't show obvious rot.
Check railings
Push railings gently with both hands at the top, then at the corners and stair returns. A railing should not move under light pressure. Look for visible cracks where balusters meet rails, loose post mounts, and rotted wood at the base where rails meet posts. A railing that wobbles during a party becomes the railing someone falls through.
Check stairs and handrails
Walk the stairs slowly. They should feel solid and even — no flex, no twist, no give. Check that each tread is securely attached at both stringers, the handrail is firm end to end, and the bottom step isn't sitting on sunken or rotting ground. Stairs are the highest-injury part of any deck; treat them seriously.
Check deck boards
Walk the surface and feel for soft spots, springiness, or boards that lift at the ends. Probe suspicious spots gently with a screwdriver — wood that compresses easily is rotting from the inside. Look for deep cracks, splintering, mushrooms or moss growing in joints, and boards pulling away from joists. A soft board is replacement; a soft joist underneath is a contractor call.
Check fasteners
Walk the deck looking for nails or screws standing proud of the surface ("popped"), heads sheared off, or rust streaks running down the boards. The same on stair stringers, handrails, and the ledger. Backed-out fasteners are an obvious trip hazard and a sign of wood movement. Heavily rusted fasteners in a coastal or heavily salted environment may not be holding what you think they are.
Check the connection to the house
The ledger — where the deck attaches to the house — is one of the most important parts of an attached deck. Look for gaps between the deck and the house, water stains, missing or rusted flashing, loose lag bolts, and wood that looks crushed or rotten. Don't remove structural parts to inspect casually. If anything looks wrong here, stop using the deck and call a pro.
Check posts and framing
Look at the posts and framing from the ground if you can do it safely. Posts should be plumb, not leaning. Wood should look solid, not punky or hollow when tapped. Watch for rot at the base of posts where they meet concrete or soil, and at every joint where water can collect. Mushrooms or fungal growth on framing means moisture is winning.
When to stop using the deck
Stop using the deck and call a pro if it pulls away from the house, posts shift, railings are loose, stairs move, framing is rotten, or the deck feels unstable. Cosmetic stain can wait. Structural uncertainty can't.
Good maintenance rhythm
- Inspect before spring and summer use, after major storms, before large gatherings, and before buying or selling a home.