Updated November 4, 2026
Why salt air matters
Salt spray is a leading cause of aluminum corrosion, and chloride from ocean spray has been found well inland, not just on the shoreline (Window and Door magazine). In Pinellas, most homes are near the Gulf, Tampa Bay or a canal, so finish and upkeep deserve attention.
Frame materials
Impact windows come in aluminum, vinyl, fiberglass and composite frames. Every option must have its own Florida Product Approval or NOA. Instead of picking a material by reputation, compare the approval documents, warranty terms and how the manufacturer treats coastal conditions. Ask your installer what they typically install and why.
Finish on aluminum frames
For coastal aluminum, the trade article suggests asking about:
- Paint coatings that meet AAMA 2605 (a high-performance standard that involves long salt spray testing)
- Class I anodizing meeting AAMA 611
- Well-sealed cut edges and seams, and weep holes that stay open so water can drain
Ask your installer which finish standard the product meets and what the warranty says about coastal exposure.
Glass and energy features
Impact glass can be paired with low-E coatings that reduce heat from the sun. The University of Florida's extension service says the solar heat gain coefficient (SHGC) is the most important energy number for Florida windows exposed to sun, and recommends looking for the NFRC label to compare products (UF/IFAS guide).
- Lower SHGC means less solar heat enters.
- Lower U-factor means less heat moves through the window.
- Compare whole-window ratings, not just the glass.
- East- and west-facing windows take the most sun.
ENERGY STAR publishes target values by climate zone; check the ENERGY STAR climate zone page for your area. Energy savings vary, and we do not promise any.
Hardware and details
Ask what the hardware is made of and how it is protected from corrosion. Our sources did not give specific hardware standards, so use the manufacturer's written information. Also ask about the screen, the sill and the drainage design.
Keeping them in good shape
- Rinse frames regularly with clean water.
- Use mild soap and a soft cloth.
- Avoid strong acidic or alkaline cleaners and scrapers that can damage the finish.
- Keep tracks and weep holes clear.
Read the warranty to see what care it requires.
Match the product to the location
A home on a barrier island facing the Gulf sees more salt spray than a home a few miles inland, but the trade article notes chloride can travel far from the shore, so do not assume you are safe just because you are not on the beach. The county permit form also sorts homes into exposure categories by distance from open water, which affects the wind pressures a product must handle (county form). Share your address with every installer so they can size the product and finish to your site.
Questions to ask before you choose
- Which finish standard does this frame meet, and does the warranty cover coastal exposure?
- What does the NFRC label say for U-factor and SHGC on the whole window?
- Which products have an FL or NOA number for the sizes I need?
- What care does the warranty require?
- Can I see a similar installation that has been in place for a few years?
Sun exposure and shading
The UF/IFAS guide notes that exterior shading, such as awnings or solar screens, is among the most effective ways to cut heat because it blocks sunlight before it reaches the glass, and that skylights are generally not recommended in Florida (UF/IFAS). If a room bakes in the afternoon, ask about glass choices for west-facing windows and about shading, not only about the frame.
What impact glass is made of
Impact glass is laminated glass, with a strong but flexible polymer layer between two panes. The idea is that if the glass breaks, the layer holds the pieces together and keeps the opening closed (manufacturer explainer). Because the whole unit is tested together, the glass, frame and anchoring all matter. A strong glass in a weak or poorly installed frame is not what the approval tested.
When two quotes look similar, compare the approval documents side by side. They list the sizes and configurations that were tested.
Frequently asked questions
Which frame is best near the water?
There is no single best choice. Compare approved products, finishes, warranties and installer experience.
Do impact windows save energy?
They can include energy-saving glass, but savings vary by home. Check the NFRC label for each product.
What does AAMA 2605 mean?
It is a performance specification for high-end paint on aluminum, involving long salt spray testing, according to a trade article. Ask your installer how it applies to your product.