Deck Board Replacement
Deck Board Replacement is a common carpentry job. Homeowners typically spend about $35 on materials if they tackle it themselves, while hiring a professional usually runs $150–$400 depending on access, parts, and local labor rates. DIY can save up to about $365 versus a full pro job when the work stays straightforward.
Expect roughly 2-4 hours for a careful DIY attempt versus about 1-2 hours for a seasoned pro. Difficulty is rated 3/5 (moderately challenging) with low risk. Typical materials include deck board, deck screws, wood preservative. Common tools: drill, circular saw, pry bar, tape measure.
Use the sections below to weigh DIY against hiring: cost ranges, safety alerts, common mistakes, and a personalized analysis for your ZIP code.
Typical Cost
Cost estimates based on cataloged material prices and regional pro rates. Run the analysis for US-wide retailer prices and a regional professional-cost estimate. How we estimate costs.
Is this a DIY job?
AI-assisted educational guidance — not reviewed by a licensed professional. Review policy.
- Typical DIY time2-4 hours
- Typical pro time1-2 hours
- Permit requiredNo
What affects the cost
- Local labor rates for carpentry pros and whether the visit is emergency vs. scheduled.
- Brand and quality of parts (deck board, deck screws, wood preservative) versus economy alternatives.
- Tool rental or purchase (catalog estimate about $45 for specialized tools).
- Access difficulty (tight spaces, multi-story work, finished surfaces that must be protected or repaired after the job).
When to hire a pro
- If a tool binds, overheats, or you are unsure of safe technique, stop and reassess or hire help rather than force the cut.
- High-impact DIY mistake — Not pre-drilling screw holes: Always pre-drill screw holes at each joist intersection to prevent the board from splitting.
- Hire a licensed deck contractor if the joists, beams, or posts show signs of rot, insect damage, or structural sagging, as board replacement alone will not fix underlying framing problems. A professional can sister new joists alongside damaged ones or replace posts and footings to restore structural integrity and bring the deck up to current building code.
- Ask whether the quote includes a full structural inspection of the joists, ledger board attachment, and railing posts, not just surface board replacement. Request a written report of any hidden rot or loose hardware found during the tear-out, with photos, so you can decide whether additional repairs are warranted before the new boards go on.
- Confirm whether the contractor will match the existing decking material and stain color, or recommend replacing all visible boards for a uniform appearance if a perfect match is not possible. Ask if the price includes re-sealing or staining the entire deck so the new boards blend in with the old ones.
- Request a line-item estimate separating labor, materials, fasteners, sealant, and disposal of old boards, and ask whether a permit is required for the scope of work. Verify the contractor carries liability insurance and workers compensation before they begin work.
- Get 3 quotes from licensed professionals
- Check reviews on Angi, Thumbtack, or Google
Hazards & safety alerts
-
medium injury Cut, puncture, or tool injury
Tools used for deck board replacement can cause deep cuts, eye injuries, or kickback. Rushing or skipping eye/hand protection multiplies the chance of injury.
Stop and call a pro if: If a tool binds, overheats, or you are unsure of safe technique, stop and reassess or hire help rather than force the cut.
Materials you'll need
| Material | Est. Price |
|---|---|
| deck board | $15.00 |
| deck screws | $8.00 |
| wood preservative | $12.00 |
| Total (DIY materials) | $35.00 |
Tools: drill, circular saw, pry bar, tape measure
DIY steps
- Inspect the deck from below if possible, using a flashlight to check the joists, beams, and posts for soft spots, rot, or insect damage before removing any boards. Press a screwdriver into suspect wood; if it sinks in easily, the joist itself may be compromised and you should consult a professional before proceeding. Mark the damaged boards with chalk or tape so you know exactly which ones to remove.
- Remove the damaged boards by backing out the existing screws with a drill or, if they are nailed, prying them up with a flat bar. Insert the flat bar under the board at each joist location and lever upward gradually, working along the length to avoid snapping the board and splintering the joist top. Pull all old nails or screws from the joist surface so they do not interfere with the new fasteners.
- Measure the span between the existing boards or the rim joist and cut the replacement board to length using a miter saw or circular saw with a sharp, fine-tooth blade. If using pressure-treated lumber, let the new boards acclimate to the outdoor humidity for a day or two so they do not shrink after installation and leave gaps. Cut replacements slightly long, then trim to an exact fit with a hand saw if needed.
- Pre-drill screw holes at each joist intersection to prevent the board from splitting, especially near the ends where pressure-treated wood is most prone to cracking. Use a drill bit slightly smaller than the shank of your exterior-rated deck screws. Position the new board to match the gap spacing of adjacent boards, typically a gap of about an eighth to a quarter inch for drainage.
- Seal all cut ends of pressure-treated boards with an end-cut preservative solution applied with a brush, since the factory treatment does not penetrate to freshly cut surfaces and exposed end grain wicks moisture fastest. Let the preservative dry according to the manufacturer instructions before installing the board, and reseal the entire deck surface if the new boards do not match the existing stain.
- Fasten each board to every joist with two exterior-rated deck screws, driving them flush but not countersunk below the surface where water can collect. Drive screws perpendicular to the board at each joist, following the fastener manufacturer's instructions. Check each board with a level or straightedge as you go to keep the deck surface flat and free of trip hazards.
- Sweep the deck clean and inspect the new boards for any protruding screw heads or splinters, sanding rough spots with 80-grit sandpaper. Apply a water-repellent sealer or stain to the new boards if they are not pre-finished, blending the color with surrounding boards as closely as possible. Wait the recommended curing time before replacing furniture or heavy planters on the repaired area.
Common DIY mistakes
-
medium Over-tightening screws
Driving screws too tightly can split the board, especially near the ends, causing damage to the joist and potentially leading to a collapse of the deck.
-
high Not pre-drilling screw holes
Failing to pre-drill screw holes can cause the board to split, especially in pressure-treated wood, leading to costly repairs.
-
medium Using the wrong drill bit
Using a drill bit that's too large for the screw can cause the board to split or the screw to strip, requiring costly repairs.
-
low Not sealing cut ends
Failing to seal cut ends of pressure-treated boards can lead to moisture damage and a shorter lifespan of the deck.
-
medium Not checking for soft spots
Inspecting the deck without checking for soft spots, rot, or insect damage can lead to a collapse of the deck.
Frequently asked questions
- How much does it cost to fix a deck board?
- DIY materials typically run about $35. Hiring a pro usually costs $150-$400 depending on your area and the scope of the job.
- Can I fix a deck board myself?
- It depends on the job. Difficulty is rated 3/5 and risk level is low. Run the free analysis on RepairSmart for a personalized DIY vs. hire recommendation.
- What are common mistakes when you fix a deck board?
- Common DIY mistakes include: Over-tightening screws; Not pre-drilling screw holes; Using the wrong drill bit. See RepairSmart for the full list and cost breakdown.
- What safety hazards should I watch for when working on deck board?
- Key hazards include: Cut, puncture, or tool injury. See RepairSmart for stop-conditions and the full safety list.
Not sure? Get a personalized recommendation
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About these estimates
- Numbers on this page come from the RepairSmart catalog (materials baselines and typical pro ranges). They are educational estimates, not contractor quotes.
- Personalized ZIP analysis may add live or cached retailer prices and regional pro signals when third-party data is configured.
- Read how costs and DIY scores are calculated, our safety & review policy, and about RepairSmart.
- If guidance is marked unreviewed, treat steps and tips as educational only—not a professional sign-off for your home.