Dock Repair vs Replace Decision Guide

QUICK ANSWER

Repair if the structural pilings are sound and total repair cost is under 60% of a replacement. Replace if pilings show waterline decay, if the dock is over 25 years old, or if storm damage exceeds 40% of the structure.

The 60% rule

If projected repair cost is more than 60% of a from-scratch replacement, replace. Below 60% and the pilings are sound, repair. This is the same rule insurance adjusters use.

Structural triggers that force replacement

Waterline decay on more than 30% of pilings
Visible sag or settlement in the deck
Framing rot at more than 25% of joist connections
Failed permitted footprint (e.g., bulkhead movement)
Dock age over 25 years on pressure-treated, or over 35 years on IPE

When repair is the right call

Decking is degraded but framing and pilings are sound — board replacement only
Hardware corrosion without structural rot — full re-fastening with 316 stainless
Storm damage to a single section — partial rebuild
Float drum failure on an otherwise sound floating dock — float replacement

FAQ

Quick questions

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How long does a dock last in coastal NC?

Pressure-treated docks last 20–30 years before major rebuild. IPE-decked docks last 35–50 years. Floating docks have a shorter life on the platform itself (15–20 years) due to UV exposure on float drums.

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What is the average cost of dock repair?

Coastal NC dock repairs range from $500 (single board replacement) to $15,000 (multi-piling structural). Most homeowners spend $1,200–$4,500 on a typical mid-life repair.

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Dock Repair vs Replace — How to Decide