Florida’s 25% roof rule used to mean that if 25% or more of a roof needed repair or replacement within 12 months, the whole roof had to be brought up to current code. A 2022 Florida law, SB 4-D, changed that: if the existing roof was built or replaced under the 2007 Florida Building Code or later, only the damaged section has to meet current code. The age of your roof is now the key question.
What Was the 25% Rule?
The rule was meant to bring older roofs up to modern standards over time. If a storm or wear damaged a large enough share of a roof, the repair could not simply patch in new materials next to old ones. Instead, the entire roof had to meet the current building code.
In practice, that often meant a full replacement. A homeowner with damage to one or two slopes could end up replacing the whole roof, because bringing an older roof up to code usually involves new underlayment, new fastening and new roof covering across the entire surface.
What Changed Under SB 4-D?
The 2022 law created an important exception. If your existing roof was built or replaced under the 2007 Florida Building Code or a later edition, only the damaged portion has to be repaired or replaced to current code, even when the damage reaches the 25% mark.
The idea is that roofs built under the 2007 code or later were already designed to more modern standards, so there is less reason to force a full tear-off for partial damage. Roofs installed before that code took effect do not get the same exception.
Does the 25% Rule Still Apply to My Roof?
The answer depends on when your roof was built or last replaced, and which edition of the code it was permitted under. To find out:
- Check your records for the roof permit and final inspection from the local building department
- Look up the permit history for your property with your city or county
- Review home purchase documents or a past wind mitigation report, which may note roof details
- Ask a licensed roofer to help confirm the roof’s age and permit history
If your roof was permitted under the 2007 code or later, a partial repair may be all that is required. If it is older, the 25% rule may still mean the whole roof has to be brought up to current code when damage is extensive.
What This Means After a Storm
Atlantic hurricane season runs June 1 to November 30, and storm damage is often when the rule comes up. If your roof is damaged, start by protecting your home from further water entry, taking clear photos and contacting your insurer.
Next, have the roof inspected by a licensed contractor who can document the extent of the damage and explain whether current code applies to only the damaged section or the whole roof. How your policy handles code-related work is up to your insurer, so ask them directly. No contractor can promise a specific claim outcome.
In Miami-Dade and Broward counties, any repair or replacement must also meet the stricter requirements of the Florida Building Code’s High-Velocity Hurricane Zone (HVHZ). Products used in Miami-Dade generally need a Notice of Acceptance (NOA), and a roof replacement needs a building permit and inspections.
Repair, Replace or Wait?
Even when the law allows a partial repair, it is not always the best long-term choice. If your roof is near the end of its typical lifespan, a repair may buy only a few years. Asphalt shingles typically last roughly 15–20 years in South Florida, while concrete and clay tile often last 30 years or more, though the underlayment may need replacing sooner. Actual lifespan depends on installation, maintenance and storm exposure.
Matching is another factor. New shingles or tiles may not blend perfectly with weathered ones. A full roof replacement in Miami also resets the roof’s age, which can simplify future repairs and the paperwork that comes with them.
Solar Dynamics is a licensed roofing contractor (CCC1335573) based in Doral, serving Miami-Dade, Broward and Palm Beach counties. Our own crews handle roofing, solar and electrical work, so one company is responsible for the roof and anything on it.
Not sure how the 25% rule affects your home? Request a free quote from our licensed roofing team.
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