How to Choose Corrosion-Resistant Windows and Doors Near the Ocean

Near the ocean, salt air works on the metal in a window or door: the finish on an aluminum frame, the hardware and the fasteners. So choose by those parts. Ask which AAMA specification an aluminum finish meets (2605 is the top tier) or which class an anodized finish meets, ask for Type 316 stainless hardware, use the anchors the product approval calls for, and read the warranty's distance-from-salt-water and cleaning clauses before you sign.

None of this replaces the hurricane ratings. Every unit still needs a Florida product approval for your opening's size and design pressure, so the coastal finish and hardware are choices you make within an approved product line.

This guide covers windows and exterior doors. For A/C condensers, railings, roof metal and the rest of the house, see our salt-air corrosion guide.

Where salt air attacks a window or door

FEMA's coastal corrosion bulletin says corrosion rates for metal are dramatically higher in coastal environments. On a window or door, the metal is in four places:

• The frame finish. An aluminum frame is only as good as its coating or anodized finish.
• The hardware. Locks, keepers, hinges, handles, operators and sliding-door rollers.
• The fasteners and anchors. Most are hidden once the trim and stucco go back on, and FEMA warns that some corrosion sites can't be inspected easily.
• Sometimes the glass. A trade article on coastal windows says some warranties exclude damage from high humidity or salt spray, and that the exclusion may reach the glass.

Two of FEMA's patterns apply directly. Sheltered spots that rain doesn't rinse collect more salt, so a slider under a lanai roof or a door in a covered entry can take more than an exposed window. And fasteners and connectors should be made of similar metals to prevent galvanic corrosion, the reaction between two different metals when moisture is present.

Frame materials compared

Whatever the frame, the hardware, fastener and warranty questions below decide most of how a unit holds up near salt water.

Aluminum: you're buying the finish

Coatings for architectural aluminum are graded under three AAMA performance specifications. Published comparisons of the 2017 editions describe them this way:

The year figure is how long coated test samples must be exposed outdoors in South Florida to qualify. It's a test requirement, not a prediction of how long a finish will last on your house, and we found no independent source that gives one.

The coastal advice we found comes from sellers: an architectural products maker lists AAMA 2605 as the tier for coastal regions, and a coatings maker recommends it for coastal or high-humidity areas. A finishing trade journal adds that pretreating aluminum before coating is critical for adhesion and corrosion resistance. "Powder-coated" or "painted" on a brochure doesn't tell you the tier, so get the AAMA number, and whether it's factory-applied over a pretreatment, in the quote.

Anodized aluminum

A construction trade journal names a Class I anodized finish meeting AAMA 611 as the alternative to an AAMA 2605 coating for seacoast settings. We didn't verify what AAMA 611 or its classes require, so ask the manufacturer which standard and class its anodized finish meets. Check the warranty too: one coastal exclusion we found names anodized finishes along with aluminum cladding.

Entry doors, sliders and garage doors

Front doors. One Florida door company's comparison says fiberglass resists rust and moisture better than steel, and a steel door's finish can rust where it's scratched. For an aluminum-and-glass door, ask the AAMA finish question, and ask what the hinges, lockset, strike plate and exposed screws are made of. Our guide to what a hurricane-rated front door costs covers swing direction and approvals.

Sliding glass doors. A slider carries more moving hardware than most windows: rollers in a track at the bottom of the opening, plus locks and handles. Ask whether the rollers and locks come in a stainless grade, and what the hardware warranty covers.

Garage doors. One sectional garage door maker's warranty reportedly excludes damage in saltwater coastal areas within two miles. We saw that only in a summary, so read the current warranty for any door you're considering. The salt-air guide covers garage door hardware and the door's role on Florida's wind mitigation form.

Hardware: 304 or 316 stainless?

• FEMA's coastal corrosion bulletin recommends Type 304 or Type 316 stainless for coastal use and says 316 is the more corrosion-resistant of the two. It also discourages painting stainless steel, because a coating can keep the metal's protective oxide film from forming.
• A fastener manufacturer says 316 contains molybdenum and resists pitting and crevice corrosion in salt environments better than 304. It describes 316 as the usual choice for coastal door and window hardware, and 304 as adequate inland and indoors.

On source quality: FEMA's bulletin is federal guidance, but it's about structural connectors and fasteners, not window locks and hinges, and the hardware advice comes from a company that sells fasteners. Both point toward 316 near the beach. We left out rules of thumb on how far from the coast to switch to 316, and what it costs extra, because we found them only in weak sources.

What to do with this:

• Don't accept "stainless" on its own. Ask for the grade of each part: lock and keeper, hinges, handles, operators, rollers and exposed screws.
• Ask whether the product line offers a coastal hardware option, and what it changes.
• Check the hardware warranty separately. One we found covers hardware only against defects that impair function and excludes tarnish and corrosion.
• Leave stainless unpainted.

Fasteners, anchors and what the frame touches

Use the anchors in the approval. A Florida product approval sets how the unit must be installed, and the inspector checks the installation against it. A unit fastened with substitute anchors or spacing isn't the product that was tested. Ask what the anchors and screws are made of, and confirm they're the ones the approval names.

Keep metals compatible. Ask how the frame, the anchors and any flashing or trim metal are kept from reacting with each other.

Watch the wood. In a concrete-block home, a window is often anchored to a buck, a frame fastened inside the masonry opening. The American Wood Council says aluminum shouldn't be in direct contact with wood treated with CCA, ACQ, copper azole or ACZA, so ask how the installer separates the frame from a copper-treated buck.

The 2026 code. The Florida Building Commission's summary of the 2026 (9th Edition) Florida Building Code describes a new Section 1711 with corrosion-resistance requirements for fasteners and metal connectors and plates within 3,000 ft of a saltwater coastline. The Commission's work plan sets the edition to take effect December 31, 2026. We haven't confirmed whether the section reaches window and door anchors or how Brevard's building officials will treat the brackish Indian River Lagoon, so if your permit goes in near that date, ask your building department which edition applies and what it requires at your address. Our hurricane code and product approval guide explains how editions and approvals work.

Read the coastal warranty before you choose

The warranty tells you how the manufacturer itself rates your exposure. We saw the coastal terms of several window and door warranties only in excerpts and couldn't always tell which clause belongs to which document, so treat these as examples of what to look for, not the terms of any product you're buying.

Distance clauses

• One warranty defines its coastal zone as within 2 miles of an ocean coastline, and warns that windows there can deteriorate more even with proper maintenance.
• Another covers AAMA 2605 finishes installed within 3 miles of a seacoast or other salt-water environment for 10 years against abnormal corrosion or loss of adhesion, compared with 20 years against loss of adhesion in non-coastal environments.

The phrase "other salt-water environment" can decide whether a lagoon-front or canal-front home gets coastal or standard terms. Ask the manufacturer in writing whether the Indian River Lagoon counts.

Exclusions and conditions

• In one coastal warranty, finish failure or corrosion of aluminum cladding, anodized and specialty finishes, and hardware caused by salt, sand or chemicals isn't covered unless the warranty expressly provides otherwise.
• One covers hardware for five years against defects that impair function, and excludes tarnish, corrosion, oxidation, erosion and finish discoloration.
• Some exclude damage from high humidity or salt spray, possibly including the glass.
• Refinishing the exterior can void the finish coverage.
• Products near coastlines or other high-salinity areas need more frequent maintenance, and failing to maintain them voids the warranty.

Questions to ask before you buy

1. What is your coastal definition, and does my address fall inside it? Does the lagoon count?
2. How many years is the finish covered at my address, and against what: corrosion, loss of adhesion, color change?
3. Is hardware covered against corrosion, or only against failures that stop it working?
4. What cleaning and lubrication schedule does the warranty require, and with what products?
5. Do I need to register the product, and by when?
6. What voids the coverage, such as refinishing or the wrong cleaners?

Get the warranty for the exact product line before you compare prices.

Need a contractor for this project?Request an impact window estimate

Space Coast examples

These are illustrations, not rules. The answer for your home depends on its distance from salt water and the products you're quoted.

Oceanfront in Melbourne Beach or Indialantic. A house facing the Atlantic sits inside every coastal distance clause we found, so plan on coastal terms applying and on the AAMA 2605 or anodized finish, 316 hardware and the warranty's cleaning schedule. Lots facing open water can also fall into a more severe wind exposure category, which raises the design pressure each opening has to meet. And seaward of the state's coastal construction control line, construction generally needs Florida Department of Environmental Protection approval, with certain exceptions, so ask whether your project needs state review as well as the local permit. See CCCL permits in Florida.

A covered lanai in Satellite Beach or Cocoa Beach. A sliding door and back windows that open onto a covered lanai stay out of the rain, which is the kind of sheltered spot FEMA says collects more salt. Specify the hardware grade for those openings with extra care, keep the slider's track clear, and put them first on the cleaning list.

Lagoon or canal lots in Indian Harbour Beach or Merritt Island. These homes face the brackish Indian River Lagoon rather than the surf, and we found no official guidance on how corrosive that is compared with the beach. The warranty's wording decides your coverage, and the same uncertainty applies to how the 2026 code's coastline rules will be read here.

Mainland Melbourne, West Melbourne, Palm Bay or Viera. West of the lagoon you're farther from the surf, but not necessarily outside every coastal definition. A home could fall inside a 3-mile definition and outside a 2-mile one, depending on where the manufacturer measures from, and a lagoon-front lot may count under "other salt-water environment" wording. Measure your distance to the ocean and the lagoon, then check each warranty's terms for your address.

Hurricane ratings still come first

A corrosion-resistant window that isn't approved for your opening isn't the right window. Impact resistance (against wind-borne debris) and design pressure (the wind load pushing in and pulling out) are separate ratings, and the approval lists them by size and configuration. Choose the coastal finish and hardware within a product line approved for each opening, and look up each FL number on the Florida Building Commission's product approval search. Our impact windows vs. hurricane shutters guide explains both ratings.

No window or door guarantees a home comes through a hurricane undamaged; the ratings describe what a product was tested to resist when installed as approved. If insurance credits matter to your decision, ask your insurer how it credits opening protection before you buy, and see our wind mitigation inspection guide.

Maintenance: follow the manufacturer's wording

Your warranty's care instructions set the real schedule, because coastal warranties can be voided if you don't follow them.

• Wash on the warranty's schedule. One coastal warranty calls for mild detergent soap and water on exterior surfaces at least every two months, more often if needed to prevent salt build-up.
• Clean and lubricate hardware. One warranty requires cleaning, clearing debris and lubricating hardware at least twice a year with a window and door silicone spray.
• Start with the sheltered openings under lanai roofs, porches and covered entries.
• Keep records of the dates, with each product's warranty and care guide, so you can show the maintenance was done if you make a claim.

We found no window or door manufacturer document that sets a fresh-water rinse schedule, so follow your warranty's wording rather than a schedule from a blog.

What to put in the quote

Ask every installer to write these into the quote, for each opening:

• Product line and Florida product approval number, with the rated design pressure, the design pressure the opening requires, and whether the unit is impact-rated
• Frame material, and for aluminum the AAMA finish specification or the anodized finish standard and class, and whether it's factory-applied
• Hardware material and stainless grade for the lock, hinges, handles, operators and rollers
• Anchors and fasteners: what they are, what they're made of, and confirmation that they match the approval's installation instructions
• How dissimilar materials are separated, including aluminum from treated wood bucks
• The warranty for the exact product line, its coastal definition, the coverage at your address and the maintenance it requires
• Coastal upgrades as separate line items, so you can see what the finish or hardware upgrade adds
• Who pulls the permit and handles the inspections

We don't have reliable figures for what coastal finishes or 316 hardware add. Our Florida planning estimates put a standard impact window at about $900–$1,800 installed, with entry-level aluminum and vinyl frames at the low end, and a large, specialty or premium-line window at about $1,800–$3,800. Those are planning ranges, not quotes. Our guide to why contractor quotes differ helps you compare bids, and the Brevard impact window cost guide and Florida impact window cost guide have fuller budgets.

Permits

Plan on a permit for window and door replacement, and don't assume Florida's under-$7,500 exemption applies: it excludes structural work and property in flood hazard areas (see the $7,500 permit exemption). In unincorporated Brevard, including Viera, Suntree and Merritt Island, the county's doors, windows and shutters permit needs the Florida product approval with the manufacturer's installation instructions and a floor plan showing where each product goes. Inside Melbourne, Palm Bay, West Melbourne, Satellite Beach, Indian Harbour Beach, Melbourne Beach and Cocoa Beach, the city or town handles permits instead; West Melbourne, for example, wants a window and door buck affidavit on site at the final inspection, and Indian Harbour Beach's post-storm guide lists window and door replacement among work that needs a permit. We couldn't confirm who reviews permits for Indialantic and some other small towns, so ask Town Hall before you apply. Our guides to window replacement permits in Melbourne and building permits in Brevard County list each office.

Common mistakes

• Accepting "coastal" or "marine grade" with no specification. Ask for the AAMA number, the anodized class or the stainless grade.
• Choosing a finish by color alone. Two frames in the same color can carry different coating tiers.
• Comparing prices without comparing warranties. The cheaper line may have weaker coastal terms.
• Letting the installer substitute anchors or fasteners. The approval's installation instructions set them.
• Assuming a lagoon-front home isn't coastal. One warranty's coastal definition includes any "other salt-water environment."
• Forgetting the doors. The front door, slider and garage door face the same salt as the windows.

Next steps

1. Measure your exposure to the ocean and to the Indian River Lagoon.
2. Collect the warranties first for each product line you're quoted, and check the coastal definition and maintenance terms.
3. Write the specification: finish tier or anodized class, hardware grade by part, and fasteners per the approval, for every opening.
4. Check the ratings and the permit: the approval number and design pressure for each opening, your permit office, and each contractor's license with our contractor checklist.
5. Set reminders for the cleaning and lubrication your warranty requires.

For more on storm protection, see the hurricane protection topic hub.