Florida Attic Insulation R Value

Most computer programs allow the user to calculate gross wall areas and subtract window and door areas.

Florida attic insulation r value.

Energystar recommends an r value of r 38 for most homes. Let s start at a base point. First check the insulation in your attic ceilings exterior and basement walls floors and crawl spaces to see if it meets the levels recommended for your area. The higher the r value the better the thermal performance of the insulation.

R values of framing members concrete blocks gypsum board etc. 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. Solid wood has an r value of 1. The table below shows what levels of insulation are cost effective for different climates and.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. Your home s age if your home is more than 10 year old you likely need more insulation. A good thermal barrier along a building envelope such as high r value insulation in the walls attic and raised floors as well as multi paned glass help to reduce conduction.

Insulation levels are measured by r value. Walls are entered by the type of assembly and the r value of insulation. All r values are insulation only tested labeled per ftc rule16 cfr 460. There are many ways to retrofit a home with fiberglass and.

Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. R value is how well insulation can resist heat flow. The transfer of heat by contact with solid objects such as the ceiling walls or floor is called conduction see figure 1.

Insulation is measured in r values the higher the r value the better your walls and roof will resist the transfer of heat. The r value your home s attic needs depends on where you live. That translates to about 12 inches of insulation. The higher the r value the better the thermal performance of the insulation.

Achieving greater r values in exterior walls. Where you live different climates require different insulation r values. 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.

Therefore a three inch thick board has an r value of 3. Recommended home insulation r values. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. An r value is also calculated per inch of width.