The Florida Building Code establishes the minimum standards for construction and renovation throughout the state, including specific requirements for window and door protection in hurricane-prone regions. For our South Florida customers, understanding these code requirements is essential when planning an impact window project to ensure compliance, pass building inspections, and qualify for insurance discounts. The code requirements vary by location, with the strictest standards applying to the High-Velocity Hurricane Zone.
At its core, the Florida Building Code requires that all windows and doors in new construction and major renovations within the Wind-Borne Debris Region provide protection against wind-borne debris. This protection can be achieved through impact-rated windows and doors, approved hurricane shutters, or a combination of both. The Wind-Borne Debris Region encompasses all of Broward and Miami-Dade counties, as well as portions of other coastal counties where wind speeds exceed certain thresholds as defined in the code. Within this region, every exterior opening must be protected when a building permit is issued for window or door replacement.
Products installed within the High-Velocity Hurricane Zone, which covers Miami-Dade and Broward counties, must carry a Miami-Dade County Notice of Acceptance or meet equivalent testing standards as defined in the code. This includes passing the large missile impact test specified in ASTM E1996 and meeting the cyclic wind pressure requirements of ASTM E1886. Products installed outside the HVHZ but within the Wind-Borne Debris Region may use products with Florida Product Approval that meet the small missile impact test, which is less stringent than the large missile test required in the HVHZ.
When replacing windows in an existing South Florida home, the trigger for code compliance depends on the scope of the project. Replacing a single window requires that the new window meet current code standards for that opening. Replacing a certain percentage of window area or renovation cost may trigger requirements for additional openings to be upgraded as well. Your building department and a knowledgeable contractor like we can help you understand exactly which requirements apply to your specific project and ensure full compliance with all applicable Florida Building Code provisions.