Soft boards, a lean, a dock that moves more than it used to. On this lake the answer is almost always found at the waterline.
Inspect here first
TVA holds Lake Guntersville at a minimum winter elevation of 593 feet and a typical summer operating range of 594 to 595 feet. Drawdown begins after Labor Day; refill comes in late April or early May. That is about a two-foot swing across a whole year.
On a tributary lake the wet/dry line sweeps up and down ten or twenty feet of piling and spreads the damage. Here it barely moves, so every wetting and drying cycle lands on the same narrow band of timber. The band is where the fasteners corrode, where the piling necks down, and where a stringer end gives up while the deck above still looks fine.
The tells, in the order we check them:
The first two are structural. The last three are usually a decking job. Sorting which one you have is the whole point of the first visit.
| Minor repairs | $100–$800 |
|---|---|
| Moderate repairs | $800–$2,000 |
| Extensive repairs | $3,500–$33,000 |
| Average dock repair | about $3,376 (range $889–$5,929) |
| Sinking dock | $150–$800 |
| Rot repair | $200–$2,000 |
| Dock leveling | $180–$900 |
| Frame repair | $150–$500 |
| Roof repair | $200–$800 |
| Float replacement, single float | $100–$400 |
| Re-deck, installed | $30–$55 per sq ft |
Source: HomeGuide, Angi
These are market ranges for this kind of work on this lake, not our rates. Your quote depends on depth, access and scope — we price after we look at it.
Repair or replace — the 50% rule. When the repair number passes about half of replacement cost, rebuild. Replacement on this lake averages around $15,000, so a repair scope crossing roughly $7,500 deserves a hard second look before you spend it.
| Pressure-treated pine | $5–$8 per sq ft material — needs annual sealing, prone to rot and warp |
|---|---|
| Composite | $4–$16 per sq ft — far lower maintenance |
| Aluminum | $8–$15 per sq ft — minimal maintenance, most expensive, gets hot underfoot |
Source: HomeGuide, Trex
Material is a maintenance decision more than a price decision. Treated pine is the cheapest board and the most work: on a lake with a fixed waterline band, the sealing schedule is what keeps the surface ahead of the water. Composite ends that chore. Aluminum lasts longest and is the one people regret in August, barefoot.
If your dock floats on bare white foam blocks, that flotation is on a clock. Unencased foam is prohibited under §1304.400 for new work, repairs and replacement, and all of it must be removed and replaced by December 31, 2031. Used plastic or metal drums are prohibited. Flotation within 40 feet of a fuel line must be 100% impervious to water and fuel.
Practically, that means an older floating dock cannot simply be re-floated with what came off it. If you are already re-decking, doing the floats in the same mobilization is the cheaper path — the barge is already there.
At the waterline. Because this lake only swings about two feet a year, decades of wetting and drying concentrate in one narrow horizontal band on every piling and stringer. Probe a foot above and a foot below the summer waterline with a screwdriver or awl. Soft wood there tells you more than the condition of the deck you are standing on.
The 50% rule: when the repair estimate passes about half the cost of replacement, rebuild. On Lake Guntersville full replacement averages around $15,000, so once a repair scope crosses roughly $7,500 you are usually buying an old dock at new-dock prices. Structural rot in multiple pilings is what most often pushes a job over that line.
No. Unencased foam flotation is prohibited under 18 CFR 1304.400 for new work, repairs and replacement, and all of it must be removed and replaced by December 31, 2031. Used plastic or metal drums are prohibited as well. Re-floating an older dock means encapsulated polyethylene floats.
Soft boards, a lean, a dock that moves. We'll tell you whether it's a repair, a rebuild, or something to watch. Free, and no obligation.
Tap to call — Mon–Sat 7am–6pm, calls answered 24/7.