Recommended Exterior Wall Insulation R Value

Here s a look at the best exterior wall insulation options.

Recommended exterior wall insulation r value.

Insulation level are specified by r value. See the department of energy s doe ranges for recommended levels of insulation below. Insulation is rated in two ways r value and u value. Recommended home insulation r values.

To meet this recommendation most homes and additions constructed with 2 in. As with attics or anywhere else in your home adding more layers of insulation to your exterior walls is key to having a higher r value and better thermal performance. Insulate the garage s ceiling by using the recommended r value for your area as advised by the department of energy s oak ridge laboratory. Basics of faced fiberglass insulation from r 13 to r 19.

The table below shows what levels of insulation are cost effective for different climates and. The r refers to absolute thermal resistance. You can achieve better thermal performance in your attic by adding an additional layer of insulation. 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.

How to achieve r 21 in a 2x4 wall. Your attic requires the most insulation up to r 60 is recommended in all but the warmest climates. The higher the r value the better the thermal performance of the insulation. For new construction or home additions r 11 to r 28 insulation is recommended for exterior walls depending on location see map below.

Walls require a combination of wall cavity insulation such as batts and insulating sheathing or rigid foam boards. That indicates which value is best for each region. Achieving greater r values in exterior walls. The r value is a calculation which measures the flow of heat through an insulation product or its.

R value is a standard unit of measurement for determining among many things how effective your insulation will be. Home depot provides a map of the u s. The r value of insulation indicates how well it resists heat and according to home depot the higher the r value the greater the insulation performance what is the ideal r value for exterior walls. Foam board insulation is easy to install between wall studs and over existing blanket insulation.

If the walls and ceiling are closed in consider using loose fill insulation as this form of insulation uses a machine to get the insulation where it needs to go through a hole in the sheetrock. The higher the r value the better the thermal performance of the insulation.