Florida’s New Building Code Takes Effect December 31: What Window and Door Contractors Need to Know

Florida's ninth edition of its building code is approaching, bringing changes to permitting, energy efficiency, coastal construction and window and door installation requirements. Here is what contractors and manufacturers should prepare for before the year ends.

Florida's construction industry is preparing for another significant regulatory transition. On December 31, 2026, the ninth edition of the Florida Building Code is scheduled to take effect, replacing the eighth edition adopted in 2023. For window and door contractors, manufacturers and remodeling companies, the transition means more than updating a reference number on permit applications. Several provisions address products, installation methods and documentation used in everyday construction projects.

The new edition incorporates selected provisions from the 2024 International Codes alongside Florida-specific amendments. Although many existing requirements for hurricane protection, structural performance and product approvals remain central to the industry, the changes introduce additional considerations involving energy efficiency, water intrusion, coastal corrosion and permitting procedures.

For companies working on projects scheduled to begin in late December or early 2027, understanding which rules apply could help avoid rejected plans, incorrect product specifications and delays during installation.

December 31 Is the Key Date for New Permit Applications

Miami-Dade County's Department of Regulatory and Economic Resources confirmed the transition in an official notice published on October 7, 2026. According to the department, permit applications and construction plans submitted on or after December 31 must comply with the ninth edition of the Florida Building Code. The county also announced that online submissions received after 4 p.m. on December 30 will be reviewed under the new edition.

That deadline is particularly important for contractors with projects already sold but not yet permitted. A signed installation contract or an accepted estimate does not, by itself, establish which edition of the building code will apply. Under Florida Statute 553.73, the applicable code is generally determined by the edition in effect when the building permit application is submitted. For applications submitted before a new edition takes effect, the earlier code generally governs the permitted work for the life of the permit and any granted extension.

Contractors should therefore review their pending permit applications before the transition and confirm submission procedures with the appropriate city or county building department. Miami-Dade's cutoff is a specific local administrative deadline and should not be assumed to apply identically throughout Florida.

New Water-Intrusion Requirements for Certain Exterior Doors

One of the more specific changes affecting the window and door industry concerns exterior doors installed beneath protective overhangs. Under the previous code, certain doors protected by an overhang could qualify for an exception to standard water-intrusion testing requirements. The ninth edition revises the conditions under which that exception can be used.

According to the Florida Building Commission's analysis of changes, Section 1709.5.1 of the Building Code and Section R609.3 of the Residential Code now require doors qualifying for the overhang exception to have a Limited Water (LW) rating under the AAMA/WDMA/CSA 101/I.S.2/A440 standard. The revised provisions also clarify the required dimensions and extensions of the protective overhang, including its relationship to the sides of the door.

For contractors, this means that the presence of a roof overhang or covered entrance is not necessarily enough to establish eligibility for the testing exception. Installers and suppliers should review the door's certification, its approved installation documentation and the actual overhang geometry before relying on the exception.

Coastal Fasteners and Corrosion Resistance Receive Greater Attention

Florida's coastal environment creates significant challenges for construction materials, particularly metallic fasteners and connectors exposed to salt-laden air. The new code introduces more detailed corrosion-resistance requirements for certain construction components located within 3,000 feet of a saltwater coastline.

In the Building Code, new Section 1711 establishes criteria for corrosion-resistant fasteners and metal connectors. The Residential Code introduces corresponding provisions under Section R332. The applicable requirements vary according to distance from the coastline and exposure conditions, with provisions addressing materials and protective coatings such as stainless steel and galvanization.

For window and door companies operating near the coast, these changes reinforce the importance of reviewing installation hardware and approved fastening specifications rather than relying on a standard hardware selection for every project. Contractors should confirm whether the new coastal provisions apply to the components involved in their installations and ensure that any selected fastening system is consistent with the applicable code and product approval documents.

Window and Door Flashing Is Also Addressed

Properly managing water around windows and doors is another area receiving attention in the updated Building Code. Changes to Section 1404.2 clarify how the intersection between a building's water-resistive barrier and its fenestration openings must be flashed and assembled.

The revised language calls for those intersections to follow the fenestration manufacturer's requirements. Where the manufacturer does not address the flashing condition, another approved method may be used. The provision is intended to improve coordination between the wall assembly, protective barrier and installed openings.

For contractors, the practical lesson is that selecting a compliant window or door is only part of a successful installation. The surrounding materials, flashing details and connection to the building envelope must also satisfy the requirements applicable to the project. Installation crews working with multiple wall systems should review the relevant manufacturer instructions and code provisions before beginning work.

Energy Efficiency: A Notable Change to Solar Heat Gain Requirements

Energy performance represents another important area of change in the 2026 code. Under Section R405.5.3.4 of the updated Florida Building Code, Energy Conservation, the maximum area-weighted average solar heat gain coefficient, or SHGC, for proposed residential designs using the R405 performance compliance method is reduced from 0.50 to 0.40.

SHGC measures how much solar radiation passes through a window or another glazed product. Lower values generally indicate reduced solar heat gain, an important consideration in Florida's hot climate and in homes with substantial sun exposure. The updated provision retains an existing exception for qualifying projects with an area-weighted average window overhang depth of at least four feet.

This distinction is essential: the 0.40 figure is not a universal new SHGC limit for every replacement window installed in Florida. It is a requirement associated with a particular residential energy compliance method. Contractors working on existing homes should determine which energy-code provisions apply to the specific scope of work rather than assuming that every replacement project must satisfy the same whole-building performance standard.

The updated energy code also tightens certain prescriptive requirements for skylights. For both Florida climate zones, the maximum permitted skylight U-factor under the relevant prescriptive tables is reduced to 0.60, while the maximum SHGC is reduced to 0.28. Manufacturers and contractors should verify the applicable performance ratings and supporting product documentation when specifying skylights for projects governed by these provisions.

Manufacturers and Contractors Should Review Product Approvals

Florida's product approval system remains a critical part of the regulatory framework for exterior windows, doors, skylights and hurricane-protection products. Contractors must ensure that the products they specify are appropriate for the intended application, including relevant design pressures, opening dimensions, installation conditions and impact-resistance requirements where applicable.

The transition to the ninth edition does not automatically mean that every previously approved product must undergo new laboratory testing. However, existing Florida Product Approvals and their supporting technical documentation should be reviewed to determine whether they continue to demonstrate compliance with the applicable requirements of the new edition.

In an October 16 industry update, testing and certification company Intertek advised manufacturers to examine their existing approval records, evaluation reports, test data, engineering calculations and installation instructions. Some products may continue to be supported by existing technical evidence, while others may require revisions, updated evaluations or additional testing.

This review also matters to installation companies. Before ordering products for projects that will be permitted under the ninth edition, contractors should confirm the applicable approval status with the manufacturer and review the approved installation details. A product's model number or general hurricane-resistant designation is not a substitute for verifying its suitability for a particular building and opening.

What About Replacing Windows in Existing Homes?

For Florida's replacement-window industry, an important distinction remains between new construction and work performed on existing buildings. The adoption of a new statewide code does not automatically require homeowners to replace windows that are already installed, nor does it mean that every provision written for new residential construction applies without modification to a routine replacement project.

Florida law also provides an existing exemption from professionally sealed drawings for certain window, door and garage-door replacements in one-family dwellings, two-family dwellings and townhouses. To qualify, the replacement must meet specified conditions, including installation in the same opening at the same size, compliance with applicable design-pressure requirements and submission of the manufacturer's installation instructions with the permit application.

That exemption concerns the requirement for sealed drawings; it does not automatically eliminate the need for a building permit. Contractors should continue to verify the project's permitting and inspection requirements with the local authority having jurisdiction, particularly when structural modifications, enlarged openings or other changes are involved.

How Window and Door Companies Can Prepare Before the Deadline

With the transition approaching, contractors should begin reviewing projects expected to enter permitting after December 30. Estimating and sales teams need to know whether specified products and installation methods will remain appropriate under the ninth edition, while permitting personnel should confirm the code edition required for each submission.

Companies should also coordinate with their manufacturers and distributors to obtain current approval documentation, updated installation instructions and any applicable technical bulletins. For projects involving coastal exposure, complex door configurations, specialized glazing or energy-performance calculations, those reviews may prevent issues that would otherwise emerge during plan review or inspection.

Finally, contractors should communicate clearly with homeowners whose projects are moving from the estimating stage into permitting. A project sold under one code cycle may be submitted under another, and discovering that difference after materials have been ordered can complicate scheduling and project execution.

A Year-End Transition With Long-Term Implications

Florida's ninth edition of the Building Code reflects the state's continuing effort to update construction standards for safety, durability and energy performance. For the window and door industry, the most relevant developments are not necessarily sweeping changes to every product on the market, but targeted revisions that require attention to technical details and documentation.

The companies best prepared for December 31 will be those that understand which provisions apply to their projects, maintain current product records and coordinate early with local permitting authorities. As Florida enters the 2027 construction season, that preparation could make the difference between a straightforward approval process and an avoidable project delay.

Reporting based on official materials from the Florida Building Commission, the Florida Statutes, Miami-Dade County Regulatory and Economic Resources, and industry technical guidance published through October 27, 2026.

Primary sources: Miami-Dade County's October 7 notice; Florida Building Code — 2026 Building changes; 2026 Residential changes; 2026 Energy Conservation changes; Florida Statute 553.73; Intertek's October 16 product approval analysis.