Signs your deck boards need replacing
- Soft spots that give underfoot, or wood a screwdriver sinks into.
- Splits and cracks deep enough to catch a heel or hold water.
- Cupping and warping that make the surface uneven.
- Nails or screws that keep backing out.
- Rot where boards sit on joists or where two boards butt end to end, the places water collects.
Check the frame first
Before pricing boards, look underneath. Probe the joists, especially their tops, where water sits under the boards, and the ledger board where the deck attaches to the house. If joists are soft or the ledger shows rot or loose fasteners, the job is a structural repair, and replacing boards alone will not make the deck safe. See deck repair cost for what structural work involves.
How deck boards are replaced
- Remove the damaged boards by backing out the screws or prying up the nails. If only part of a board is damaged, cut it over a joist.
- Inspect the joist tops. Joist tape applied before the new boards go down protects the framing from water.
- Cut new boards so any end joint lands on the center of a joist, and stagger joints so they do not line up across the deck.
- Keep consistent gaps between boards for drainage, matching the existing spacing, or the manufacturer's guidance for composite.
- Fasten with two exterior-rated screws per joist, pre-drilling near the ends to prevent splitting.
What it costs
| Job | Typical cost |
|---|---|
| Board replacement, installed Most jobs, all-in | $10–$35 / sq ft |
| Pressure-treated, cedar or redwood boards Material only | $3.65–$9.60 / sq ft |
| Composite or PVC boards Material only | $8.35–$12.65 / sq ft |
| Tropical hardwood (ipe, tigerwood) Material only | $8.50–$16 / sq ft |
A handful of boards is a small job, so a minimum charge usually applies; replacing a whole run or re-decking a section brings the price per square foot down. The hidden costs are underneath: a joist that needs reinforcing, or rot found once the old boards come off.
Matching new boards to an old deck
New pressure-treated lumber is paler, often greenish, and wetter than boards that have weathered for years. It evens out over a season or two, and it should dry before it is stained. Composite colors change and get discontinued, so an exact match is not always possible. A common approach is to move sound old boards to the most visible spots and put the new ones where they show least, or to replace a whole section so the change looks deliberate.
Replace boards or resurface the deck?
If a few boards are bad and the rest are sound, replace the few. If most boards are weathered, split or cupping but the frame is solid, re-decking the whole surface on the existing frame can be the better value, and it is the moment to switch to composite if you want less upkeep.
Common questions
Can I replace just a few deck boards?
Yes, as long as the joists underneath are sound. Match the thickness and width, land cut ends on joists, and expect new wood to look different until it weathers.
Should I flip deck boards instead of replacing them?
Flipping sound wood boards to show their less-weathered underside can extend their life. It only works if the board is solid and the fastener holes are in good shape; rotted or split boards should be replaced.
Screws or nails for deck boards?
Exterior-rated deck screws. They hold better as wood expands and shrinks, and they are far less likely to back out than nails. Composite decking often uses hidden fastener systems specific to the brand.
When can I stain new pressure-treated boards?
Once they have dried out, which can take weeks to a few months. Water should soak in rather than bead on the surface before you apply stain.
Related guides
Compiled from published 2026 national cost data (HomeGuide, Homewyse, Lawn Love). We update these figures as we complete jobs.