R Value Needed In Florida Attics

Walls are entered by the type of assembly and the r value of insulation.

R value needed in florida attics.

Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. 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. R value is how well insulation can resist heat flow.

Most computer programs allow the user to calculate gross wall areas and subtract window and door areas. Existing 3 4 inches of insulation. The r value your home s attic needs depends on where you live. That translates to about 12 inches of insulation.

Insulation which is compressed will not give you its full rated r value. Energy star s map of recommended home insulation shows that the majority of florida is within zone 2. R values of framing members concrete blocks gypsum board etc. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

There are many ways to retrofit a home with fiberglass and. Recommended insulation levels for retrofitting existing wood framed buildings. Your home s age if your home is more than 10 year old you likely need more insulation. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

Energystar recommends an r value of r 38 for most homes. This can happen if you add denser insulation on top of lighter insulation in an attic. 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. You can see on home depot s website how many inches translates to a certain r value.

Foam in place insulation can be injected into walls to reduce air leakage and improve r value. 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. All r values are insulation only tested labeled per ftc rule16 cfr 460. Different materials respond to weather conditions differently.

Add insulation to attic. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. It also happens if you place batts rated for one thickness into a thinner cavity such as placing r 19 insulation rated for 6 1 4 inches into a 5 1 2 inch wall cavity. Where you live different climates require different insulation r values.