Recommended R Values For Wall 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.

Recommended r values for wall insulation.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Department of energy r value recommendations for new and existing homes. Thickness density and type of materials are some factors that contribute to. Other considerations may include indoor air quality impacts life cycle costs recycled content embodied energy and ease of installation especially if you plan to do the.

Note from this. Achieving greater r values in exterior walls. The higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation.

The table below shows what levels of insulation are cost effective for different climates and. The r refers to absolute thermal resistance. Insulation level are specified by r value. The following 2008 department of energy zone recommendations are based on comparing estimated future energy savings to the current cost of installing insulation.

Recommended home insulation r values. While wall insulation is limited by the width of the studs different materials provide higher or lower r values. To choose the best insulation for your home from the many types of insulation on the market you ll need to know where you want or need to install the insulation and what r value you want the installation to achieve. R value is a measure of insulation s ability to resist heat traveling through it.

Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. See the department of energy s doe ranges for recommended levels of insulation below. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.