Florida Attic Insulation R Value

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.

Florida attic insulation r value.

Insulation is measured in r values the higher the r value the better your walls and roof will resist the transfer of heat. Most computer programs allow the user to calculate gross wall areas and subtract window and door areas. 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. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

Walls are entered by the type of assembly and the r value of insulation. The higher the r value the better it insulates. Solid wood has an r value of 1. The higher the r value the better the thermal performance of the 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. That translates to about 12 inches of insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Each state does have their own minimum insulation requirements which are often lower than the levels recommended by the department of energy.

The r value your home s attic needs depends on where you live. Your home s age if your home is more than 10 year old you likely need more insulation. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.

R value is how well insulation can resist heat flow. An r value is also calculated per inch of width. Therefore a three inch thick board has an r value of 3. R value is a measure of insulation s ability to resist heat traveling through it.

Achieving greater r values in exterior walls. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. The transfer of heat by contact with solid objects such as the ceiling walls or floor is called conduction see figure 1. R values of framing members concrete blocks gypsum board etc.

All r values are insulation only tested labeled per ftc rule16 cfr 460. The table below shows what levels of insulation are cost effective for different climates and. Insulation level are specified by r value. There are many ways to retrofit a home with fiberglass and.

Energystar recommends an r value of r 38 for most homes. The higher the r value the better the thermal performance of the insulation. Let s start at a base point. Recommended home insulation r values.