Repair or Replace an Old Deck?
Many Eastside homes have decks built in the 1980s and 1990s that look tired, feel soft in places, or move when the family stands at the railing. The choice is usually between three options: repair the problem spots, resurface on the existing framing, or replace the deck entirely. The right answer depends almost entirely on the framing you cannot see from above. This guide shows how to tell.
Three options
Repair:
replace specific boards, reinforce railing posts, replace a rotted post, re-flash the ledger. Right when the deck is mostly sound and the problems are local.
Resurface:
new decking and railings on the existing framing. Right when the framing is sound, correctly spaced for the new boards and solidly connected to the house.
Replace:
remove everything, including footings where needed, and build new. Right when the framing has rot, the ledger connection is suspect, or the deck no longer suits how the family uses the yard.
What to check
Start at the house and work outward.
- Ledger. From below, look at the board fastened to the house. Is there flashing above it? Are the fasteners bolts or just nails? Is the wood soft when you push a screwdriver into it? Are there dark streaks on the siding below? The ledger is the most common point of deck failure.
- Joists. Push a screwdriver into the tops and ends of a few joists, especially near the house and under planters. Soft wood means rot.
- Beams and posts. Check posts at ground level. Posts buried in soil or sitting directly on concrete without a standoff base rot from the bottom.
- Footings. Look for settling, tilting or cracked footings.
- Joist spacing. Measure. Many older decks have joists 24 inches apart; most composite boards need 16, and diagonal patterns need 12.
- Railings. Push firmly at the top of each post. Movement means the post connection is failing.
- Stairs. Check stringers where they meet the ground and the deck.
- Movement. Walk briskly across the deck. Bounce or sway points to undersized framing or missing bracing.
How to decide
| Finding | Likely answer |
|---|---|
| Boards worn, framing solid, ledger flashed and bolted | Resurface |
| A few soft boards and one loose railing post | Repair |
| Joists at 24 inches and you want composite | Replace framing or add joists |
| Rot at the ledger or rim behind it | Repair ledger at least; often replace |
| Several posts rotted at grade | Replace posts; consider full replacement |
| Two or more structural issues together | Replace |
| Deck is the wrong size or shape for how you live | Replace with a new layout |
Repair, resurface and replace costs
| Option | Typical Eastside range |
|---|---|
| Targeted repairs | $1,500 – $15,000 |
| Resurface with composite and new railing | $35 – $65 per sq ft |
| Full replacement, ground level | $60 – $115 per sq ft |
| Full replacement, elevated | $85 – $160 per sq ft |
Resurfacing looks cheaper, but if the framing has only a few years left, the new boards will outlast the structure under them. Composite boards carry warranties of 25 to 50 years; putting them on twenty-five-year-old untaped framing rarely makes sense.
The case for replacing when in doubt
Replacement removes the hidden risk at the ledger, puts footings at current depth, adds joist tape and flashing, and lets the deck be resized and redesigned. The cost difference from a resurface is often smaller than expected because tear-out and new framing are a modest share of the total.
The case for repairing
A well-built deck from the 2000s with flashed ledgers and good footings may need only boards and railings. Replacing sound framing is waste. Repair also makes sense when a sale is near and the goal is safety and a clean inspection rather than a new outdoor space.
Before you decide
Get the framing inspected. A professional inspection probes the ledger, rim, joists and posts and gives a written finding. It costs little, and it turns the decision from guesswork into arithmetic.
Book an inspection. You get a written answer: repair, resurface or replace.