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. R values given in table 402 1 1 frame walls r 13 block walls interior insulation r 7 8 exterior insulation r 6 ceilings. 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. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. 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.

The higher the r value the better it insulates. The higher the r value the better the thermal performance of the insulation. Raised r 13 sog r 0 windows. Typically current best home building practices indicate an r 30 to r 38 for attic insulation.

Existing 3 4 inches of insulation. You can see on home depot s website how many inches translates to a certain r value. 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.

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. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. Add insulation to attic. 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. The r value your home s attic needs depends on where you live. 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. Recommended insulation levels for retrofitting existing wood framed buildings.

Framed wall insulation must meet or exceed r 13. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Achieving greater r values in exterior walls. Energystar recommends an r value of r 38 for most homes.

Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. 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. Climate zone 1 consists of the following south florida counties. Maximum 20 of conditioned floor area.

Foam in place insulation can be injected into walls to reduce air leakage and improve r value.