Wood, composite, aluminum, or concrete? A straight comparison of decking and piling materials for Florida saltwater — lifespan, cost, corrosion resistance, and what Naples contractors actually recommend.
Saltwater is the harshest environment a structure can live in — constant moisture, marine borers, salt spray, and UV. The material you choose determines both your upfront budget and how often you'll repair your dock over the next three decades.
Costs reflect 2025 Naples-area supply and installation rates. For full project pricing, see our dock construction cost guide for Naples.
Decking takes the brunt of sun, salt, and foot traffic. Here's how the five main options perform in a Naples saltwater environment.
The budget standard. Affordable and proven, but softwoods in Florida saltwater are vulnerable to marine borers and splitting, so plan on refinishing and replacing boards every few years.
A dense South American hardwood that's naturally rot and borer resistant. Beautiful and strong, but pricey, heavy to work, and it weathers to gray unless you oil it regularly.
The most recommended choice in Naples. Composite never rots, never splinters, and shrugs off borers and salt. It costs more upfront, but the near-zero maintenance pays off fast. See our composite dock decking services.
Marine-grade aluminum lasts decades and stays cool under the Florida sun. Premium cost, and fasteners must be stainless and isolated to prevent galvanic corrosion.
Extremely durable and low maintenance, but heavy, expensive to support, and almost never used for residential dock decking — it's far more common as a piling material.
Pilings are the most critical — and most expensive — part of your dock. They take the full force of the load plus the most aggressive marine environment. Choose wisely; replacing a piling is far harder than replacing a deck board.
Piling lifespan and performance depend heavily on water depth, current, and the specific marine borer population in your canal. Dive deeper in our guide to how long pilings last in Florida, and see marine piling installation for how new pilings are set.
Saltwater is a powerful electrolyte, and metal components on a dock are constantly exposed to it. Corrosion isn't just cosmetic — it silently eats fasteners, lift cables, and fittings until a connection fails.
Most Naples docks combine materials rather than picking one for everything. Here are the combinations our network of licensed contractors installs most often.
Composite decking is the most popular choice for saltwater docks in Florida because it resists marine borers, never needs staining, and lasts 25–40 years with minimal maintenance. Pressure-treated wood is the budget option but requires annual attention and is vulnerable to borers. Aluminum and IPE are premium alternatives, while concrete is rarely used for residential decking.
Composite pilings are widely considered the best all-around choice for Florida saltwater because they are immune to marine borers and typically last 25–50 years. Concrete pilings are excellent for deep-water and gulf-access docks but are heavier and cost more to install. Pressure-treated wood is the most affordable but has the shortest lifespan, and steel pilings require careful corrosion protection.
Yes. Modern pressure-treated wood resists rot and termites, but Teredo shipworms (also called marine borers) can still attack the submerged portion of pilings in warm Florida waters. This is why annual inspections and borer-resistant materials like composite pilings are recommended for Naples and Marco Island docks.
Aluminum is an excellent saltwater decking and framing material when properly specified — marine-grade 6061-T6 with stainless fasteners and isolation from dissimilar metals. It lasts 40+ years, never rots, and needs almost no maintenance, but it costs more upfront than wood or composite.
Composite decking typically lasts 25–40 years in Florida saltwater, and composite pilings can last even longer — 25–50 years. Unlike wood, composite will not rot, splinter, or be eaten by marine borers, which is why it is the most recommended decking material in Naples.
Composite decking costs roughly 25–40% more than pressure-treated wood upfront — about $40–$80 per square foot installed versus $30–$60 for wood. However, composite eliminates the recurring cost of staining, sealing, and board replacement, so lifetime ownership costs are often lower.
Skip the guesswork. Licensed marine contractors serving Naples and Southwest Florida will recommend the right materials for your water and give you written quotes.
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