R Value Needed In Florida Attics

Add insulation to attic.

R value needed in florida attics.

Energy star s map of recommended home insulation shows that the majority of florida is within zone 2. Most computer programs allow the user to calculate gross wall areas and subtract window and door areas. The r value your home s attic needs depends on where you live. Recommended insulation levels for retrofitting existing wood framed buildings.

R value is how well insulation can resist heat flow. Different materials respond to weather conditions differently. 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. Where you live different climates require different insulation r values.

Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. All r values are insulation only tested labeled per ftc rule16 cfr 460. You can see on home depot s website how many inches translates to a certain r value. This can happen if you add denser insulation on top of lighter insulation in an attic.

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. Walls are entered by the type of assembly and the r value of insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Your home s age if your home is more than 10 year old you likely need more insulation.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Energystar recommends an r value of r 38 for most homes. Foam in place insulation can be injected into walls to reduce air leakage and improve r value. Insulation which is compressed will not give you its full rated r value.

For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. That translates to about 12 inches of insulation. There are many ways to retrofit a home with fiberglass and. The higher the r value the better it insulates.

Existing 3 4 inches of insulation. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. 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. R values of framing members concrete blocks gypsum board etc.