jar546
CBO
The main change here is that there is an exception for roofs replaced or constructed withing the last two code cycles, otherwise, if you have to replace or repair more than 25% of your roof, you have to replace the whole thing.
REROOFING
1521.1General.
Materials and methods of application used for recovering or replacing an existing roof covering, system or assembly shall comply with the requirements set forth in Sections 1512 through 1525.1521.2
Repairs shall be carried out with roofing components as defined in this chapter having a product approval.1521.3
Repairs shall be carried out in such a manner as to not create additional ponding water.1521.4
Not more than 25 percent of the total roof area or roof section of any existing building or structure shall be repaired, replaced or recovered in any 12-month period unless the roof covering on the entire existing roof system or roof section is replaced or recovered to conform to the requirements of this code.Exception: If an existing roofing system or roof section was built, repaired, or replaced in compliance with the requirements of the 2007 Florida Building Code, or any subsequent editions of the Florida Building Code, and 25 percent or more of such roofing system or roof section is being repaired, replaced, or recovered, only the repaired, replaced, or recovered portion is required to be constructed in accordance with the Florida Building Code in effect, as applicable. Pursuant to Section 553.844(5), Florida Statutes, a local government may not adopt by ordinance an administrative or technical amendment to this exception.