Your dock is expensive. It sits at the interface between your property and water—exposed to sun, moisture, temperature swings, and boat traffic. Docks are designed to last a long time, but they do require maintenance and occasional repair.
We’ve handled hundreds of dock repairs on Lake Travis, Lake Austin, and throughout the Texas Hill Country. Some are simple fixes you can do yourself. Others need a professional contractor. And sometimes, a repair job reveals that the dock is too far gone and replacement is the smarter option.
This guide helps you spot dock problems early, understand repair costs, and know when it’s time to call in the pros.
The Nine Warning Signs Your Dock Needs Repair
Catching dock problems early is the cheapest way to maintain your investment. Here’s what to look for.
Rotting or Soft Wood
If you have a wooden dock, press a screwdriver into the boards. If it goes more than 1/4 inch deep without resistance, the wood is rotting. Soft wood at the edges of boards or where boards meet the frame is especially common.
Wood rot is the most common dock problem we see. It spreads if not addressed. A small area of rot discovered early might cost $300 to $800 to repair (replacing affected boards). Left alone for a year, that same spot can spread to $2,000 or more in repairs.
On Lake Travis, where humidity is high and water is warm, wood rots faster than in cooler climates. If your dock has exposed wood, expect to treat or replace boards every 5 to 8 years.
Rusted or Corroded Hardware
Look at bolts, brackets, and fasteners. If they’re showing rust or white corrosion, that’s a problem. Rust weakens the structural connections and will eventually fail.
Light surface rust might just need cleaning and repainting. Heavy rust or deep corrosion means hardware replacement, which costs $100 to $400 depending on how much hardware is affected.
On Lake Travis and Lake Austin, we always recommend stainless steel hardware when repairing docks. Galvanized hardware corrodes faster in these lake environments. The upfront cost is higher, but it lasts 2 to 3 times longer.
Loose Pilings or Wobbly Dock Structure
Walk out on your dock and bounce gently. If there’s noticeable movement or flex, something is loose or compromised. Push on the railing—it shouldn’t move.
Loose pilings are serious. They can allow the dock to shift, which stresses other structural components and creates safety hazards. This is not a DIY fix. You need a professional assessment to determine whether pilings need tightening, replacement, or if deeper structural issues exist.
Piling repairs run $500 to $3,000 depending on how many need work and the depth of the problem.
Cracked or Split Boards
Small cracks on the surface are cosmetic. Deep splits that go through the board or cracks at the edges near fasteners are structural concerns. They can lead to further splitting and eventually board failure.
A cracked board on a wood dock typically needs replacement, which costs $200 to $600 per board including labor. On an aluminum dock, cracked decking boards typically cost $300 to $800 to replace depending on board type.
Visible Gaps Between Boards or at Seams
Boards shrink and swell with moisture and temperature changes. Small seasonal gaps are normal. If you can fit a quarter-inch coin into gaps throughout the deck, or if gaps have appeared suddenly, it suggests the dock has shifted or the substructure has moved.
Significant gaps also create a safety hazard—shoes and crutches can catch. Gaps usually mean the substructure has settled or shifted, which requires assessment by a professional.
Algae, Mold, or Black Stains
Some algae growth is normal on docks. Heavy mold or black stains are both cosmetic and functional issues. They indicate poor drainage or ventilation underneath the dock.
Light growth can be cleaned with a pressure washer or deck cleaner. Heavy growth suggests water is pooling under the dock, which can accelerate rot and decay. You may need to add drainage or improve ventilation under the dock structure, which costs $300 to $1,200 depending on the issue.
Sunken or Sagging Sections
If one end of your dock sits lower than the other, or if the middle sags, the substructure is compromised. This is serious and typically requires professional repair.
Common causes include foundation settlement, rotted support posts, or undersized framing. The fix depends on the cause. It might cost $1,500 to $4,000 to properly repair.
Missing or Damaged Caulking or Sealant
Where boards meet the frame or where seams exist, caulk prevents water intrusion. Gaps in caulking let water get behind boards and cause rot. Missing sealant is an early warning sign.
Re-caulking a dock is a straightforward DIY job that costs $50 to $200 in materials and takes a few hours. It’s cheap insurance against larger problems.
Spongy or Cushioned Feel When Walking
Your dock should feel solid underfoot. If it feels spongy, compressible, or cushioned, the substructure has likely absorbed water and is deteriorating. This is especially common with wooden docks that are 10+ years old.
A spongy feel often means the damage is already advanced. You likely need significant repair or replacement. Get a professional assessment right away.
Cost of Common Dock Repairs
Here’s what you can expect to spend on typical dock repairs on Lake Travis or Lake Austin.
Board Replacement: $200 to $800 per Board
Replacing a single decking board costs $200 to $400 in labor plus $100 to $400 for the board itself depending on material. Composite or aluminum boards cost more but last longer. Wood is cheaper but may need replacement again sooner.
Fastener or Hardware Replacement: $100 to $600
Replacing rusted bolts, brackets, or fasteners typically costs $100 to $300. If multiple fasteners need replacement throughout the dock, expect $400 to $600. Stainless steel hardware costs more upfront but lasts longer.
Piling Repair or Replacement: $500 to $3,000+
Tightening or minor repair of a single piling: $200 to $500. Replacing a piling: $1,000 to $2,500 depending on depth and difficulty. Multiple piling repairs: $2,000 to $5,000+.
Caulking and Sealant: $50 to $300
Re-caulking a small dock section: $50 to $150. Full dock re-caulking: $200 to $400 in materials and labor.
Substructure Reinforcement: $800 to $3,000
If your dock’s frame needs bracing or reinforcement (but not replacement), expect $800 to $2,500 depending on the extent of work. This often involves adding cross-bracing or replacing failed components.
Water Damage Restoration: $1,500 to $4,000
If water has compromised multiple boards or the substructure, restoration costs escalate quickly. You might need to replace several boards, treat rot in the frame, and improve drainage. Budget $1,500 to $3,000 for significant water damage restoration.
Floating Dock Repair: $1,000 to $5,000
Floating docks have unique failure modes. Pontoons can leak, cables can fail, and connections can corrode. Repairs are more complex. Budget $1,000 to $3,000 for most common floating dock issues.
When Can You DIY a Dock Repair?
Some dock work is straightforward enough for a competent homeowner. Some is not.
DIY-Appropriate Repairs
You can tackle these yourself if you’re comfortable with basic tools and safety:
- Re-caulking seams: Clean out old caulk, apply new marine-grade sealant. Straightforward and low-risk.
- Replacing bolts or fasteners: If it’s just swapping out hardware on an accessible connection, it’s doable.
- Cleaning and treating light algae: Pressure washing or scrubbing with deck cleaner is safe.
- Tightening loose bolts: If you have a wrench and can safely reach the connection, tightening a bolt is simple.
- Replacing a decking board on a small dock: If you can remove fasteners and fit a new board, you can do this. Make sure the board is supported properly.
- Minor rail repairs or replacing small rail sections: Usually straightforward if you’re comfortable with basic carpentry.
Not DIY-Appropriate: Get Professional Help
Call a pro for these:
- Piling work: Adjusting, replacing, or working with pilings requires knowing proper installation and load distribution. Get a professional.
- Structural repairs: If the dock structure is compromised, don’t guess. Get an assessment from someone who knows dock engineering.
- Significant rot damage: Treating extensive rot requires knowing the extent of damage and proper treatment. A pro can assess whether repair or replacement makes sense.
- Electrical work: If your dock has lighting or power, all electrical work must be done by a licensed electrician. This is a legal requirement.
- Floating dock repairs: Pontoon repairs, cable systems, and drainage issues on floating docks need professional expertise.
- Working at heights: If the repair requires safe work at height, hire it out. Falls from docks into water can be dangerous.
When in doubt, call a professional. A $100 phone consultation to assess a problem is cheaper than a $2,000 repair that makes things worse.
Repair vs. Replace: How to Decide
Sometimes a repair is straightforward. Sometimes the dock is so compromised that replacement is the better choice. How do you decide?
Ask These Questions
How old is the dock? If it’s 12+ years old and showing multiple signs of damage, replacement might be more economical than chasing repair after repair.
What’s the scope of the damage? If repairs affect more than 25-30% of the dock’s structural components, replacement often makes sense. If it’s isolated to one area, repair is usually better.
What’s the condition of the substructure? If the frame or pilings are compromised, repairs become expensive quickly. A new dock with a solid substructure might be cheaper long-term.
What material is the dock made from? Wood docks are expensive to repair after rot damage. Aluminum docks rarely need structural repair. Composite decks need board replacement but not structural work.
Will this repair solve the problem or just delay it? If you’re replacing individual boards on a dock that’s rotting throughout, you’re throwing money at a declining asset. If it’s spot repair on an otherwise sound dock, that’s different.
The 50% Rule
A useful guideline: if repairs will cost more than 50% of replacement cost, replacement is usually the smarter financial choice. You get a new dock with a warranty, no surprises, and predictable future maintenance.
If your dock is 15+ years old and needs $3,000 in repairs, and a new dock costs $5,500 to $7,000, replacement is worth considering.
Replacement Costs for Context
A new aluminum dock on Lake Travis typically costs $4,500 to $8,500 for a standard 12-by-16-foot dock installed. A composite or wood dock is similar or slightly cheaper upfront. If your repair bill is approaching this, replacement deserves consideration.
A new dock comes with:
- A solid warranty (usually 5 to 25 years depending on material)
- No surprises (you know what you’re getting)
- Modern safety features and code compliance
- Choice of materials suited to today’s knowledge (aluminum docks like our custom builds handle Lake Travis water better than old wood or composite designs)
- Predictable maintenance (clean or minor upkeep, not constantly fixing problems)
Storm Damage on Lake Travis: Special Considerations
Lake Travis experiences sudden heavy weather. Spring storms with high winds and waves, occasional hail, and rare but serious flooding can damage docks.
Common Storm Damage
Wind throws debris into docks, dents aluminum, and can tear apart connections. High waves stress pilings and can shift floating docks. Heavy rain and water level spikes can saturate wood and compromise substructure integrity.
Insurance for Dock Damage
Most homeowner’s insurance policies cover docks, but coverage varies. Some policies have separate deductibles for water damage. Some exclude damage from “acts of God” like floods. Some require specific endorsements for detached structures like docks.
Check your policy or call your agent. If you have significant storm damage, document it with photos and report it promptly. Insurance claims for dock damage are common and legitimate.
Preventing Storm Damage
There’s no way to completely storm-proof a dock, but some designs hold up better:
- Aluminum docks withstand storm impacts better than wood or composite.
- Floating docks with proper mooring can handle water level spikes better than fixed docks.
- Proper drainage prevents water from pooling and stressing the structure.
- Well-maintained connections are less likely to fail when stressed.
If you’re planning a dock on Lake Travis and storm resilience matters to you, discuss it with your contractor. It affects design choices.
Finding a Reputable Dock Repair Contractor
Not all contractors are created equal. Here’s what to look for when you need dock work.
Local Experience on Lake Travis or Lake Austin
A contractor who understands Lake Travis’s water level swings, weather patterns, and local regulations is worth the premium. They know what works and what doesn’t.
References from Recent Projects
Ask for references. Call them. Ask specifically about whether the repair held up, whether costs stayed on budget, and whether the contractor was reliable.
Written Estimates
Never accept a phone estimate for dock work. A professional contractor visits your dock, assesses the damage, and provides a detailed written estimate. If something changes during the project, a good contractor communicates before proceeding.
Warranty or Guarantee
Reputable contractors stand behind their work. Ask what warranty they offer on repairs—typically 1 to 3 years for workmanship and materials.
Licenses and Insurance
Make sure they’re properly licensed in Texas if required. Confirm they carry liability insurance. If someone gets injured on your property during a repair job, you want them to be covered.
Clear Communication
A good contractor explains what’s wrong, what needs to be fixed, why it costs what it costs, and what the timeline is. If you don’t understand their explanation, ask again. You should feel confident in the repair decision.
The Dock Repair Timeline
How long do repairs take? It depends on the scope.
Simple repairs (fastener replacement, caulking, minor board replacement) typically take 1 to 3 days.
Moderate repairs (piling work, significant board replacement, substructure reinforcement) take 1 to 2 weeks depending on complexity and material availability.
Major repairs or replacement: 2 to 4 weeks depending on dock size and customization.
Weather can delay work. Lake Travis docks can’t be properly worked on in high wind or rough water. Spring storms sometimes delay projects.
Ask your contractor for a realistic timeline and don’t be surprised if it slips by a week or two due to weather or unexpected issues discovered during the work.
Preventive Maintenance: Stop Problems Before They Start
The cheapest repair is the one you prevent. Here’s what regular dock maintenance looks like:
Quarterly inspection: Walk the dock and look for the warning signs mentioned above. 30 minutes, four times a year.
Annual cleaning: Rinse off dirt, algae, and debris. Inspect and treat any soft spots. Replace fasteners if you see corrosion.
Every 3 to 5 years: Professional inspection if it’s an older dock. A pro can spot problems you might miss. Cost: $150 to $300. Peace of mind: priceless.
Seasonal maintenance: After heavy storms, do a damage check. Before winter (if you’re in the Hill Country where freezing happens), winterize any water-exposed components.
This preventive approach costs a few hundred dollars per year but saves you thousands in major repairs.
What’s the Lifespan of a Typical Dock?
With proper care, here’s what you can expect:
Wood dock: 8 to 12 years before significant repairs needed. 12 to 15 years before replacement makes sense.
Composite dock: 15 to 20 years before major degradation. Repairs might be needed sooner depending on maintenance and climate.
Aluminum dock: 20 to 25+ years with proper maintenance. Structural repairs are rare if installed correctly.
These timelines assume reasonable maintenance. Neglected docks fail faster. Well-maintained docks often exceed these estimates.
Your Next Steps
If your dock is showing signs of damage, don’t wait. Early repairs are cheap. Late repairs are expensive.
If you’re not sure whether your dock needs repair or replacement, get a professional assessment. Document any damage with photos. If you have recent storm damage, report it to your insurance company if applicable.
Need a dock repair assessment? Contact Longhorn Docks for a professional inspection and honest recommendation. Call us at (512) 200-4244 or request a dock repair consultation online. We’ll evaluate your dock, explain what needs attention, provide a detailed quote, and help you understand whether repair or replacement makes sense for your situation. Let’s protect your dock investment before small problems become big expenses.