Florida Attic Insulation R Value

Foam in place insulation can be injected into walls to reduce air leakage and improve 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. Energy star s map of recommended home insulation shows that the majority of florida is within zone 2.

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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.

Florida attic insulation r value.

Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. Energystar recommends an r value of r 38 for most homes. The r value your home s attic needs depends on where you live. Climate zone 1 consists of the following south florida counties.

You can see on home depot s website how many inches translates to a certain r value. Typically current best home building practices indicate an r 30 to r 38 for attic insulation. What r value is best for my home. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

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

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