Florida Attic Insulation R Value

Must be inside conditioned space tested to q n 0 03 by a class 1 bers.

Florida attic insulation r value.

Framed wall insulation must meet or exceed r 13. Foam insulation r values range from r 4 to r 6 5 per inch of thickness 2 54 cm which is up to 2 times greater than most other insulating materials of the same thickness. Recommended insulation levels for retrofitting existing wood framed buildings. Achieving greater r values in exterior walls.

Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. Climate zone 1 consists of the following south florida counties. Add insulation to attic. Energystar recommends an r value of r 38 for most homes.

Typically current best home building practices indicate an r 30 to r 38 for attic insulation. Raised r 13 sog r 0 windows. Energy star s map of recommended home insulation shows that the majority of florida is within zone 2. The florida building code identifies two distinct climate zones.

Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. 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.

The higher the r value the better it insulates. Existing 3 4 inches of insulation. Different materials respond to weather conditions differently. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.

What r value is best for my home. The r value your home s attic needs depends on where you live. This zone has a recommended r value of 30 to 60 for an uninsulated attic r25 to r38 for an attic with existing insulation and r13 to r19 for the floor. That translates to about 12 inches of insulation.

You can see on home depot s website how many inches translates to a certain r value. The higher the r value the better the thermal performance of the insulation. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Foam in place insulation can be injected into walls to reduce air leakage and improve r value.

Maximum 20 of conditioned floor area.