PIMA’s State Energy Code Fact Sheets provide state-by-state details about the minimum insulation requirements for low-slope commercial roofing in both new and existing buildings. Each fact sheet includes state-specific insulation requirements, code-compliant assembly examples, and links to helpful resources. PIMA monitors state codes regularly to provide the most up to date information possible.
The applicable building energy code that determines the minimum insulation requirements for commercial roofs with insulation entirely above the deck in Florida is the 2017 6th Edition Florida Building Code, Energy Conservation (based on the 2015 International Energy Conservation Code with state specific amendments). The minimum insulation requirements apply both to new construction and roof replacements on existing buildings.
The minimum requirement for insulation installed entirely above the roof deck is R-20 for climate zone 1 and R-25 for climate zone 2. This code became effective on December 31, 2017.
Sample roof assembly diagrams and additional information can be found in PIMA’s Florida code fact sheet.