Indiana Insulation Attic R Value

13 5 means r 13 cavity insulation plus r 5 insulated sheathing.

Indiana insulation attic r value.

A thermal moisture and radiant barrier. Either insulation meets the requirement. The higher the r value the better the thermal performance of the insulation. Foam insulation has a solution for this wild frontier.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Install foam insulation for a closed attic system and you stop the extreme temperatures never allowing the air to invade the space keeping it conditioned to the home s temperature. Recommended insulation levels for retrofitting existing wood framed buildings. Department of energy recommends 16 in.

What r value do i need. 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 for walls represent the sum of cavity insulation plus insulated sheathing if any. Where you live different climates require different insulation r values.

Add insulation to attic. As a benchmark one inch of solid wood has an r value of 1. It is recommended that most homes in indiana have between r 49 and r 60 of insulation depending on the insulation material. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

If your home is in a warmer climate you require an r 38 or higher or about 12 more. Of attic or roof insulation in regions where the u s. Your home s age if your home is more than 10 year old you likely need more insulation. There are many ways to retrofit a home with fiberglass and.

The first r value applies to continuous insulation the second to framing cavity insulation. R 5 shall be added to the required slab edge r values for heated slabs. Or insulation sufficient to fill the framing cavity r 19 minimum. Many homes have as little as 9 in.

Existing 3 4 inches of insulation. The higher the r value the better the insulation s ability to resist heat flow. Insulation levels and thermal performance are measured by r value. The second r value for mass walls applies when more than half the insulation is on the interior of the mass wall.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7 along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. The insulation for basement walls must be from the top of the wall down 10 feet below grade or to the basement floor whichever is less.