Attic Insulation Florida Code

Climate zone 1 consists of the following south florida counties.

Attic insulation florida code. What r value is best for my home. Here s what you need to know about insulation requirements in florida. Section r806 5 spray foam code local codes based on irc 2009. Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Blown fiberglass installed in the attic has an r value of 2 2 per inch so 12 inches of it would give you an r value of 26 4 in your attic installation project. Residential requirements for insulation are divided by the location in the home. Unvented attic code local codes based on irc 2009.

Framed wall insulation must meet or exceed r 13. Section r316 local codes based on irc 2012. Insulation requirements in florida. Typically current best home building practices indicate an r 30 to r 38 for attic insulation.

When designing and building an unvented attic using spray foam insulation you need to take into account code related to. Section r316 building thermal envelope code local codes. Contributes to but does not supersede thermal resistance requirements for attic and roof assemblies in section c402 2 1 of the florida building code energy conservation. Yes generally a higher r value means a more effective insulator but the highest r value possible may not be necessarily right for your project.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Most insulation you buy will have a sq ft number for easy reference. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Let s say you measured your attic and you realize your attic has about 9 inches r 30 of insulation and your attic is about 40 sq feet you d need at least 3 inches of extra insulation that covers 40 sq ft to get an r value of r 38.