Florida Attic Insulation R Value

Energy star s map of recommended home insulation shows that the majority of florida is within zone 2.

Florida attic insulation r value.

What r value is best for my home. 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. 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. Framed wall insulation must meet or exceed r 13.

Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. Energystar recommends an r value of r 38 for most homes. Recommended insulation levels for retrofitting existing wood framed buildings. You can see on home depot s website how many inches translates to a certain r value.

R values given in table 402 1 1 frame walls r 13 block walls interior insulation r 7 8 exterior insulation r 6 ceilings. Maximum 20 of conditioned floor area. The r value your home s attic needs depends on where you live. Climate zone 1 consists of the following south florida counties.

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. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. Different materials respond to weather conditions differently.

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. Existing 3 4 inches of insulation. Foam in place insulation can be injected into walls to reduce air leakage and improve r value. Typically current best home building practices indicate an r 30 to r 38 for attic insulation.

The higher the r value the better the thermal performance of the insulation. Achieving greater r values in exterior walls. Add insulation to attic. The florida building code identifies two distinct climate zones.

That translates to about 12 inches of insulation. The higher the r value the better it insulates. 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. Raised r 13 sog r 0 windows.

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.