If part of your roof is damaged, one Florida rule decides whether you can patch it or have to replace the whole thing — the 25% rule. It’s about to change, and most homeowners (and a lot of contractors) are still working off the old version.
What the 25% rule says today
Under the Florida Building Code, if more than 25% of a roof section is repaired or replaced within any 12-month period, that entire section generally has to be brought up to current code — not just patched back to how it was. On an older South Florida roof, that often turns a “big repair” into a full replacement, because current code means current HVHZ standards, fastening, and underlayment.
What’s changing with the 9th Edition Building Code
The 9th Edition of the Florida Building Code (taking effect at the end of 2026) revises the rule so it’s less punishing for newer roofs. The key change: if the undamaged portion of your roof was already built to the 2007 Florida Building Code or later, you may be allowed to repair the damaged area without re-doing the whole roof, even if the damage is over 25%.
Older roofs (built before that 2007-code era) still fall under the stricter “replace the whole section” version of the rule.
The practical takeaway: newer roofs get more flexibility to repair; older roofs still often trigger a full replacement once damage crosses 25%.
Why this matters for your wallet
Two things decide whether you’re facing a repair or a replacement:
- How much of the roof is affected (the 25% threshold), and
- How old the roof is / what code it was built to.
There’s also an insurance angle: many Florida policies include law-and-ordinance coverage, which can help pay for the code-required upgrades when the 25% rule forces a bigger job. It’s worth checking your policy before you assume a repair is all you’ll get.
How we handle it
When we inspect a roof, we tell you plainly which side of the 25% line you’re on, what code your roof was built to, and whether a repair is genuinely allowed or whether you’re better off replacing. No scare tactics — sometimes the honest answer is “this is a repair.” See our roofing services, or get a free inspection and we’ll walk it with you.
This is general information, not legal or code advice — the final call always rests with your local building department (AHJ) and your policy.