Indiana Insulation Attic R Value

The higher the r value the better the thermal performance of the insulation.

Indiana insulation attic r value. 13 5 means r 13 cavity insulation plus r 5 insulated sheathing. Many homes have as little as 9 in. 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. 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.

As a benchmark one inch of solid wood has an r value of 1. The first r value applies to continuous insulation the second to framing cavity insulation. A thermal moisture and radiant barrier. R 5 shall be added to the required slab edge r values for heated slabs.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. It is recommended that most homes in indiana have between r 49 and r 60 of insulation depending on the insulation material. 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.

The higher the r value the better the insulation s ability to resist heat flow. Your home s age if your home is more than 10 year old you likely need more insulation. Either insulation meets the requirement. What r value do i need.

Or insulation sufficient to fill the framing cavity r 19 minimum. Foam insulation has a solution for this wild frontier. Achieving greater r values in exterior walls. The second r value for mass walls applies when more than half the insulation is on the interior of the mass wall.

Insulation levels and thermal performance are measured by r value. Recommended insulation levels for retrofitting existing wood framed buildings. There are many ways to retrofit a home with fiberglass and. Existing 3 4 inches of insulation.

Department of energy recommends 16 in. 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. Attic insulation for homes that are situated in cold climates homeowners need to ensure that they have a minimum of r 49 in their attics this is equivalent to about 16 inches of fibreglass insulation. Of attic or roof insulation in regions where the u s.

Add insulation to attic. R values for walls represent the sum of cavity insulation plus insulated sheathing if any.