A dock in Miami-Dade lives in the same brutal environment as your seawall — salt water, tidal cycling, storm loads, relentless sun — plus two enemies the wall doesn’t have: marine borers eating it from the inside and a live structural load (your boat, your lift, your family) standing on it. Docks fail more quietly than seawalls, and the failure you care about tends to announce itself at the worst moment: under load.
We repair docks and piers across Miami-Dade with the same licensed marine crews, equipment, and permit fluency we bring to seawall work — and when the two structures need attention together, one mobilization covers both.
What Fails on South Florida Docks
Pilings — the part that matters most
Everything on your dock stands on its pilings, and pilings concentrate their damage in the tidal zone — the band that’s wet, then dry, then wet again, twice a day:
- Marine borers. Shipworms and gribbles bore into submerged wood year-round in our warm water. The insidious part: they hollow pilings from the inside while the surface looks weathered but fine. The classic sign is the hourglass profile — a piling visibly necked-down at the waterline.
- Rot and UV above the waterline; abrasion from fenders, lines, and debris at it.
- Hardware corrosion. Galvanized bolts and brackets sacrifice themselves to salt water on a schedule; stainless lasts longer but isn’t immune, especially in crevices.
The frame — stringers and cross-bracing
The horizontal structure that carries the deck rots from the top down (trapped water at fastener penetrations) and from the connections out (corroding hardware crushing softened wood). A spongy deck usually means stringer trouble, not deck-board trouble.
Decking
The visible, replaceable part. Cupped, split, or loose boards are a maintenance item — but they’re also the inspection window to the frame below, which is why we never quote a “deck job” without looking underneath.
Boat lift structures
Lift pilings carry point loads far beyond a dock’s distributed load, so borer or corrosion damage that a walkway tolerates becomes critical under a lift. If your lift’s pilings are original and your boat has gotten bigger over the years — that’s an assessment worth scheduling this month, not this year.
How We Repair
Piling replacement and remediation. Failed pilings are extracted or cut out and driven anew — wrapped timber, concrete, or composite depending on load and budget. Where the below-mudline section is sound, jacketing and sistering restore capacity without full replacement. Lift pilings get sized for the lift you have now, not the one the dock was built for.
Frame restoration. Stringers and bracing replaced with properly flashed, marine-fastened lumber; connection hardware upgraded to current marine-grade spec.
Decking. Re-decking in pressure-treated, hardwood, or composite — with the fastener and gapping details that decide whether the next deck lasts 10 years or 25.
Storm and impact repair. Post-hurricane straightening, re-driving, and rebuild work, documented for insurance from the first site visit. For active failures, our emergency response covers docks too.
Dock permits in Miami-Dade
Docks and piers are structures over tidal waters, which puts them under DERM Class I jurisdiction just like seawalls — plus your municipality's building review, and state/federal layers for work seaward of mean high water. Like-for-like repair is the lightest review path; expansion or new construction is heavier. We scope the work to the right permit category and file everything. Background reading: the Miami-Dade coastal permit guide.
The Dock–Seawall Connection
Docks and seawalls aren’t independent structures — they share soil, water, and often structure:
- Dock approaches typically bear on the backfill behind the seawall. When a wall starts losing soil, the dock approach settles first — a dropped approach slab is a seawall symptom as often as a dock one.
- Wake and scour patterns that undermine a wall’s toe work on nearby dock pilings the same way.
- Shared mobilization and permitting make combined projects meaningfully cheaper than sequential ones.
It’s why our seawall inspections include a look at the dock, and every dock assessment includes a look at the wall. Finding the second problem while the barge is already there is the cheap way to find it.
What Dock Repair Costs
Ranges vary with structure and scope — piling work is priced per piling (access and material driving the spread), re-decking per square foot, frame work by extent. What we can promise is the same practice as our seawall side: an on-site assessment first, then a written, itemized quote with repair and rebuild options priced separately where both make sense. If a $900 piling jacket will honestly do what a $4,000 replacement would, that’s what the quote will say.
Before the Season, Not After the Failure
The best time to assess a dock is before you need it at full strength — ahead of boating season, ahead of hurricane season, ahead of the new boat that weighs half again what the lift pilings were driven for. The assessment is free, it takes under an hour, and it either buys you peace of mind or catches the problem while it’s still a line item instead of a rebuild.
Frequently Asked Questions
How do I know if my dock pilings are failing?
Look for the hourglass: pilings noticeably thinner at the waterline than above or below it — the signature of marine borer attack and abrasion concentrated in the tidal zone. Other tells: soft wood you can push a screwdriver into, rust streaks on piling hardware, a dock that moves more underfoot than it used to, and visible lean in any piling. Any of these warrants an assessment before you park a boat lift's load on it.
What are marine borers?
Shipworms (teredo worms) and gribbles — organisms that bore into submerged wood and consume it from the inside. Warm South Florida water keeps them active year-round, and they can hollow out an unprotected piling while its surface looks nearly intact. Wrapped, treated, or non-wood pilings (concrete, composite) are the standard defenses.
Can you replace pilings without rebuilding the whole dock?
Usually, yes. Individual pilings can be extracted or cut and replaced — or sistered/jacketed where conditions suit — while the deck structure is temporarily supported. If more than roughly a third of the pilings are failing, replacement economics start favoring a rebuild, and we'll show you both numbers.
Do dock repairs need permits in Miami-Dade?
Yes — docks are structures in or over tidal waters, so DERM Class I jurisdiction applies, plus municipal building review. Like-for-like repair generally moves through review far faster than new construction or expansion, and some scopes qualify for expedited handling. We confirm the path and file everything.
Should I repair my dock and seawall at the same time?
If both need work — strongly yes. They share mobilization (barge or equipment access), often share a permit application, and structurally they interact: dock pilings and seawall panels influence each other's soil, and a failing wall can take the dock's approach with it. Bundling routinely saves 20–30% versus two separate projects.