Florida's 25% Reroofing Rule, found in the 2020 (Seventh Edition) Florida Building Code– Existing Building Edition’s Chapter 7 Section 706 EXISTING ROOFING and as modified by Florida Legislature’s SB 4-D.

While the “25% rule” has been in the Florida Building Code (FBC) for many years, recent legislative changes, specifically within Senate Bill 4-D (2022), have clarified and/or changed the way this specific code section on existing roofing is to be applied.