Direct Answer
The Florida Building Code generally requires a complete roof tear-off down to the roof deck when the existing roof is water-soaked or deteriorated, certain prohibited roof-covering materials are present, two or more roof-covering applications already exist, or required securement provisions cannot be met. These conditions are addressed in Section 706.3 of the 2023 Florida Building Code, Existing Building, titled “Recovering versus Replacement.”
Blisters in existing roofing may be an exception if they are cut or scraped open and the remaining materials are secured before the new roof is installed. Separate requirements apply in Florida’s High-Velocity Hurricane Zone (HVHZ), and certain independent roofing systems may qualify for an exception.
Who This Applies To
- Commercial property owners considering a roof recover instead of replacement
- Facility managers overseeing flat or low-slope roofs
- Commercial roofing contractors and estimators
- Roof consultants and structural engineers
- Building owners preparing reroofing permits in Florida
1. When Is a Complete Tear-Off Required?
Section 706.3 identifies conditions under which new roof coverings cannot be installed without first removing existing roof-covering layers down to the roof deck.
| Existing roof condition | Code implication |
|---|---|
| Water-soaked or severely deteriorated roofing | Remove existing layers when the roof is no longer an adequate base for additional roofing. |
| Wood shake, slate, clay tile, cement tile, or asbestos-cement tile | The listed existing coverings trigger the removal provision, subject to applicable exceptions. |
| Two or more existing roof-covering applications | Existing layers must generally be removed down to the deck before installing new coverings. |
| Blisters in existing roofing | Removal may be avoided under this provision if blisters are cut or scraped open and the remaining materials are secured before installing the new covering. |
| Existing covering used to attach the new system, but securement requirements cannot be met | Remove existing layers when the applicable securement provisions of Section 1504.1 cannot be satisfied. |
These requirements come from Section 706.3 of the 2023 Florida Building Code, Existing Building. The adopted code, applicable exceptions, and project-specific requirements should be reviewed before finalizing the scope of work.
2. What If the Existing Roof Has Two or More Layers?
If the existing roof has two or more applications of roof covering, Section 706.3 generally requires removal of the existing layers down to the roof deck before installing a new covering.
This is important for commercial buildings that have undergone several reroofing projects. A contractor should establish the number of existing roof-covering applications during the initial inspection rather than assume that another overlay is permitted.
3. Does Water Damage Automatically Require a Tear-Off?
The code requires removal when the existing roof or roof covering is water-soaked or deteriorated to the point that it cannot adequately support an additional roofing layer. The key consideration is whether the existing roof remains a suitable base for the proposed system.
Roof inspections should identify moisture intrusion, damaged insulation, deteriorated substrates, loose materials, and other conditions that could affect the proposed assembly. A qualified roofing professional can help determine whether the existing materials are suitable for recover or whether removal and repairs are necessary.
4. Are There Exceptions to the Tear-Off Requirement?
Yes. The applicable code includes exceptions that must be evaluated before determining whether removal is mandatory.
- HVHZ buildings: Buildings in the High-Velocity Hurricane Zone must comply with the applicable HVHZ provisions, including Sections 1512 through 1525 of the Florida Building Code, Building.
- Independent roofing systems: Certain complete and separate systems, such as qualifying standing-seam metal roof systems, may not require removal of existing coverings when they are designed to transfer roof loads directly to the building’s structural system and do not rely on existing roof coverings for support.
- Blister treatment: The code provides a specific allowance for addressing blisters by cutting or scraping them open and securing the remaining materials before installing additional roofing.
These exceptions are conditional. They should not be treated as blanket permission to install a new roof over an unsuitable existing assembly.
5. Is the 25% Roof Rule the Same as the Tear-Off Rule?
No. Florida’s 25% rule and the tear-off provisions address different issues.
The 25% rule generally addresses how much of an existing roof area or roof section may be repaired, replaced, or recovered within a 12-month period without triggering requirements for the entire roof system or section. Florida Statutes Section 553.844(5) provides an exception for qualifying roofing systems or roof sections built, repaired, or replaced in compliance with the 2007 Florida Building Code or a subsequent edition.
The tear-off requirements in Section 706.3 focus on specific existing roof conditions and whether the new covering can legally and technically be installed over the existing assembly. Meeting the 25% rule does not automatically make a roof recover eligible.
6. What Should Contractors Check Before Choosing a Recover?
- Document the number of existing roof-covering applications.
- Inspect for water-soaked materials, deterioration, blisters, and substrate damage.
- Confirm whether the property is within the HVHZ.
- Verify the proposed system’s attachment and securement requirements.
- Review applicable product approvals, permit requirements, and code exceptions.
- Confirm the adopted code edition and any applicable supplements with the local building department.
Bottom Line
Under Section 706.3 of the 2023 Florida Building Code, Existing Building, a complete tear-off down to the deck is generally required when the existing roof is water-soaked or too deteriorated to support another layer, certain listed roof-covering materials are present, two or more roof-covering applications exist, or required securement provisions cannot be met. Evaluate the listed exceptions and applicable HVHZ requirements before deciding whether a recover is permitted.
Related Questions
- When is it better to replace a commercial roof rather than repair it?
- What happens if I install a commercial roof without proper product approval?
- What are common red flags in commercial roof condition reports?
Sources
- Florida Building Commission — 2023 Roofing Code Development Report, Section 706.3
- Florida Building Commission — Official Florida Building Code Resources
- Florida Roofing Association — 2023 Florida Building Code Roofing Updates
- Miami-Dade County — 2023 Florida Building Code HVHZ Roofing Changes
- Florida Statutes, Chapter 553 — Building Construction Standards
Last reviewed: October 2026
Related Resources
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Before choosing a recover or complete replacement, have the existing roof’s condition, layer count, attachment, and drainage evaluated. A professional assessment can help determine the appropriate scope of work and identify potential code-compliance issues.
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This article provides general educational information about Florida roofing code requirements. Applicable provisions depend on the adopted code edition, building location, existing roof conditions, and project scope. Consult the applicable code and local building official for project-specific requirements.
