Commercial Roofing Contractors Orlando
Roof system

Standing Seam Metal Roof Systems

Roof System

Material Selection: Galvalume vs. Painted Steel vs. Aluminum

Galvalume (zinc-aluminum coated steel) is the standard substrate for standing seam commercial applications in Central Florida. It provides corrosion resistance appropriate for the humidity and rainfall environment without the premium cost of aluminum. Galvalume carries paint warranty terms of 25-40 years from major manufacturers (Nucor, AEP Span, MBCI, Metal Sales) when used with factory-applied Kynar 500 or PVDF coatings.

Painted steel over Galvalume with Kynar 500 coating is the specified combination for most Orlando commercial standing seam installations where color matching to a design standard is required. Kynar 500 coatings retain color and gloss in Florida's UV environment better than polyester finishes — the coating warranty terms reflect the manufacturer's confidence in the coating's UV performance in a market like Central Florida.

Aluminum standing seam is specified for coastal-adjacent buildings where salt air is a corrosion factor, or for buildings where the design calls for aluminum panel aesthetics. The Orlando metro is not in the immediate coastal zone, but buildings along the east edge of Orange County or in the Lake Nona area near the wetlands can have elevated humidity and airborne moisture that makes aluminum worth considering for a 40-year application.

FBC Wind-Resistance Design for Standing Seam in Orange County

Standing seam systems must pass ASTM E1592 cyclic loading tests at design pressures appropriate for the building's FBC wind exposure. For a typical low-rise commercial building in Orange County Exposure C terrain, design pressures at the roof perimeter and corners can reach 60-90 psf uplift. The clip spacing, panel profile, and attachment to the structural deck must be engineered to resist these pressures.

Theme-park-adjacent commercial buildings in the Universal and SeaWorld resort corridor and along I-Drive present specific design pressure challenges — many of these properties are in Exposure D terrain due to the open water features and flat parking fields that surround them, which increases design pressure above what a standard Exposure C calculation would produce. We pull terrain analysis for every standing seam project before specifying clip spacing or panel profiles.

Florida Product Approval is required for standing seam systems installed in Florida. Every panel profile and clip system we specify carries a Florida Building Commission product approval number, and we document the approval numbers in the permit package. This documentation is also required by most commercial property insurers as evidence of FBC compliance for wind mitigation credit purposes.

Frequently asked questions

How long does standing seam metal last in Florida?

A properly installed standing seam system with Galvalume substrate and Kynar 500 coating in Central Florida should reach 40-50 years of service life with minimal maintenance — no membrane replacement cycles, no seam re-welding. The maintenance requirements are annual gutter and downspout clearing, inspection of ridge cap and endlap conditions, and monitoring of penetration flashings. The lifecycle cost advantage over multiple membrane replacement cycles is significant.

Does standing seam require a building permit in Orlando?

Yes. Commercial roofing in Florida requires a building permit regardless of system type. Standing seam installations must document the Florida Product Approval number for the panel and clip system, the wind pressure design, and the attachment to the structural deck. We manage the permit process and deliver the permit documentation as part of the project closeout.

Can standing seam be installed over an existing flat roof?

Standing seam retrofit over an existing flat roof requires a structural analysis of the existing deck and the building's ability to support the additional framing load. We coordinate with a structural engineer on any standing seam retrofit scope. In many cases, the retrofit involves installing a secondary framing system (a subframing layer) above the existing roof to create the necessary slope for drainage — Orlando's flat terrain and high rainfall make slope design critical.

What colors are available for standing seam in commercial applications?

Major manufacturers offer 30-50 standard Kynar 500 colors ranging from neutral charcoals and whites to brick reds and custom architectural tones. Custom colors are available at premium lead times and minimum order quantities. For corporate campus buildings or franchise properties with brand color standards, we match to the design specification and document the Kynar 500 color designation in the warranty materials.

Next Step

Standing seam the right system for your Orlando building?

Our project managers will assess the building's structural deck, run the FBC wind pressure analysis for your location, and produce a standing seam scope with panel profile, clip system, and full warranty documentation.

Request a Metal Roof Assessment →