Florida Attic Insulation R Value

The r value your home s attic needs depends on where you live.

Florida attic insulation r value.

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. Existing 3 4 inches of insulation. Maximum 20 of conditioned floor area. Different materials respond to weather conditions differently.

Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. 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. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable.

Framed wall insulation must meet or exceed r 13. Energystar recommends an r value of r 38 for most homes. Achieving greater r values in exterior walls. Raised r 13 sog r 0 windows.

You can see on home depot s website how many inches translates to a certain r value. That translates to about 12 inches of insulation. Climate zone 1 consists of the following south florida counties. Foam in place insulation can be injected into walls to reduce air leakage and improve r value.

The florida building code identifies two distinct climate zones. What r value is best for my home. Recommended insulation levels for retrofitting existing wood framed buildings. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Must be inside conditioned space tested to q n 0 03 by a class 1 bers. The higher the r value the better it insulates. Add insulation to attic. R values given in table 402 1 1 frame walls r 13 block walls interior insulation r 7 8 exterior insulation r 6 ceilings.

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. 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. Typically current best home building practices indicate an r 30 to r 38 for attic 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.

The higher the r value the better the thermal performance of the insulation.