Direct Answer
Yes. Florida’s 25% roof rule is generally based on the amount of an existing roof or roof section being repaired, replaced, or recovered—not simply on the type of roofing material. Therefore, the rule can apply to different roofing systems, including asphalt shingles, tile, metal, and other roof coverings when the applicable Florida Building Code requirements are triggered.
However, the 25% rule is more nuanced than simply saying that “more than 25% means the entire roof must be replaced.” The applicable code edition, whether the work involves repair, replacement, or recovery, the age and compliance history of the existing roof, and whether a specific exception applies can change the outcome.
Who This Applies To
This guidance is primarily for Florida property owners, commercial property managers, facility managers, contractors, architects, developers, and building owners planning roof repairs or replacement.
Not for: Assuming that the 25% threshold automatically produces the same requirements for every building. The local building official and applicable Florida Building Code provisions should be consulted for a specific project.
1. The 25% Rule Is Based on Roof Area, Not Just Material
The Florida Building Code addresses the percentage of an existing roof area or roof section that is repaired, replaced, or recovered during a 12-month period. The code provision is therefore fundamentally an area-based requirement, rather than a rule that applies only to asphalt, tile, metal, TPO, PVC, or another particular roofing material. The Florida Building Commission’s code-change analysis specifically identifies the provision as the “25 percent rule.”
Under the 2023 Florida Building Code analysis, when the 25% rule is triggered, it applies to both roof replacement and roof recover.
2. What Happens When 25% Is Exceeded?
The general code concept is that more than the permitted percentage of an existing roof or roof section cannot simply be repaired, replaced, or recovered while leaving the remainder outside the applicable code requirements.
The Florida Building Code language identifies a limit of 25% of the total roof area or roof section in any 12-month period, subject to the applicable exceptions.
In practical terms, a contractor should determine:
- The total roof area or applicable roof section.
- The area already repaired, replaced, or recovered during the relevant 12-month period.
- The area proposed for the new work.
- Which Florida Building Code edition and provisions apply.
- Whether an exception applies to the existing roof.
3. Does It Apply to Asphalt, Tile, Metal, TPO, and PVC?
| Roofing Material | Does Material Alone Exempt It From the 25% Rule? |
|---|---|
| Asphalt shingles | No. Material type alone does not create a blanket exemption. |
| Clay or concrete tile | No. The applicable code provisions still need to be evaluated. |
| Metal roofing | No. The 25% analysis is not simply a metal-versus-nonmetal determination. |
| TPO | No. The membrane material itself does not automatically eliminate the rule. |
| PVC | No. The membrane material itself does not automatically eliminate the rule. |
| Modified bitumen | No. The applicable roof-area and code requirements still need to be evaluated. |
| Other roof coverings | The applicable code provisions and exceptions should be reviewed for the specific project. |
4. Existing Roof Compliance Can Matter
One important exception is that the 25% requirement is not applied in exactly the same way to every existing roof.
The Florida Building Code materials identify an exception for an existing roof covering that was permitted and installed in compliance with the applicable code or the two previous versions of the Florida Building Code.
Florida Statutes also contain a related provision addressing an existing roofing system or roof section that was built, repaired, or replaced in compliance with the 2007 Florida Building Code or a subsequent edition. Where 25% or more is being repaired, replaced, or recovered, the statute provides that only the repaired, replaced, or recovered portion is required to be constructed in accordance with the Florida Building Code in effect, as applicable.
This is why the roof’s installation history and permitting records can be just as important as the roofing material itself.
5. The Roof Section Matters
The calculation should not automatically be treated as one simple percentage for every square foot of roofing on a property. The applicable provisions refer to the total roof area or roof section.
A large commercial property may have multiple roof sections, additions, elevations, or roofing assemblies. Determining the correct roof section for the calculation can therefore be important when planning phased repairs or replacement.
6. Do Not Assume You Can Avoid the Rule by Splitting Work Into Projects
The code provision specifically addresses work performed within a 12-month period. Consequently, dividing a larger project into separate repair or replacement contracts does not automatically eliminate the need to evaluate the 25% requirement.
Property owners should maintain records of previous roof work, including dates, areas repaired, areas replaced, and areas recovered.
7. Florida’s Current Code Environment Matters
The Florida Building Commission identifies the 8th Edition (2023) Florida Building Code as effective December 31, 2023, with subsequent supplements and the 2026 code update process underway.
Because roofing requirements can change between code editions and project circumstances, a contractor should verify the applicable code provisions when preparing a permit or determining whether a repair can remain limited to a portion of the roof.
Example
Suppose a commercial building has a roof section containing 20,000 square feet. Twenty-five percent of that roof section is 5,000 square feet.
If the proposed work involves approximately 3,000 square feet, the project is below 25% based solely on that calculation. If the proposed work involves 6,000 square feet, it exceeds 25%, so the applicable code requirements and exceptions need to be evaluated before proceeding.
This example illustrates the calculation concept only. The actual determination depends on the specific building, roof section, previous work, applicable code, and permitting requirements.
Bottom Line
The Florida 25% roof rule is not limited to one roofing material. It is principally concerned with the percentage of an existing roof or roof section being repaired, replaced, or recovered during the applicable period. Asphalt, tile, metal, TPO, PVC, and other roofing systems should therefore be evaluated under the applicable Florida Building Code provisions rather than assuming that one material is automatically exempt.
Before starting a significant repair or replacement project, document the roof area, previous work, roof section, installation history, permits, and proposed scope. For a specific Florida project, the final determination should be confirmed with the appropriate building official and qualified roofing professional.
Related Questions
- Does the 25% rule apply if the damage is from a hurricane?
- When is it better to replace a commercial roof rather than repair it?
- Should I repair or replace my commercial roof?
- Should I repair or replace my leaking commercial roof?
Sources
- Florida Statutes §553.844 – Windstorm Loss Mitigation; Requirements for Roofs and Opening Protection
- Florida Building Commission – 2023 Florida Building Code Roofing Code-Change Analysis
- Florida Building Commission – Analysis of Changes, 8th Edition (2023)
- Florida Building Commission – Florida Building Code Resources
Last reviewed: October 2026
Related Resources
Understanding the 25% rule is particularly important when deciding whether a damaged commercial roof should be repaired, recovered, or replaced.
Need Commercial Roofing Help?
ShieldLine Roofing can help evaluate existing roof conditions, document repair areas, and determine an appropriate repair or replacement strategy for commercial properties.
Disclaimer: This information is provided for general educational purposes and does not constitute legal, engineering, insurance, or building-code advice. Requirements can vary based on the building, location, applicable code edition, existing roof, and project scope.
Commercial Roof Repair in Florida
