Deck board soft or rotting
A soft deck board is most often moisture damage from ground contact or poor drainage, but it can also be termite damage — the two look similar and only a licensed pest inspector can reliably tell them apart before any repair starts.
What is most likely wrong
| # | Cause | How common | What it looks like |
|---|---|---|---|
| 1 | Moisture wicking / poor drainage | Most common | Softness concentrated near ground contact, under planters, or where water pools and does not drain — common in Florida's humidity and heavy seasonal rain. |
| 2 | Termite damage | Needs a pest inspector to confirm | Wood that sounds hollow when tapped, visible mud tubes on posts or the foundation, or damage concentrated at ground contact points. Termites are a year-round Central Florida risk in wood decking. |
| 3 | UV and moisture cycle wear | Common with age | General surface graying, splintering and softening spread evenly across older boards, not concentrated in one spot. |
| 4 | Corroded fasteners or connectors | Less common | Rust staining around screws or joist hangers, weakening the board's attachment rather than the wood itself. |
What you can safely check yourself
- Poke suspect boards with a flathead screwdriver — wood that gives easily or crumbles is compromised, whatever the cause.
- Look for mud tubes (pencil-width dirt tunnels) on posts or framing, a termite sign that needs a licensed pest inspector, not a handyman diagnosis.
- Check whether the softness is isolated to ground-contact areas (points to moisture) or spread across the whole deck surface (points to general age/wear).
If any of this involves opening an electrical panel, running new wiring, cutting into a gas or water line, or working higher than a stepladder safely reaches, stop and call a licensed tradesperson — that is not handyman-scope work, regardless of how small the fix looks.
Why this happens in this housing stock
Casselberry’s sustained humidity and 30-plus lakes make ground-contact moisture wicking a routine cause of deck damage here, and Central Florida’s termite pressure is a year-round factor in any exterior wood structure. We will tell you when what we are looking at might be termite damage and needs a licensed pest inspection before any repair — we do not make that call ourselves.
What the fix typically costs
| Job | Researched range | What drives it |
|---|---|---|
| Board-level repair (materials, per sq ft) | $3–$45 | Extent of damage and material grade. |
| Full deck replacement (average) | $8,000 | Size and whether framing needs replacing too. |
These are researched third-party market ranges, not this business’s pricing — see the sources at the bottom of the page. Add the Casselberry permit fee on top of any job that needs one.
Not sure what you are looking at?
Send a photo, the approximate age of the house, and what you already checked. That is usually enough to know whether it is a handyman fix or needs a licensed trade.