What Rating Of Insulation For Exterior Walls

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

What rating of insulation for exterior walls.

While there are additional considerations such as venting and moisture problems to take into account when you insulate under floors the united states department of energy recommends an r 25 rating in cold climates and an r 11 in warmer parts of the country. What is the best r rating for insulation. Again when choosing insulation the r value that you need depends on where you live and what part of your home you need to insulate attics need insulation with a much higher r value than walls. See the department of energy s doe ranges for recommended levels of insulation below.

Floors and crawl spaces need a lower r value than attics but they still require a higher value than walls. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

R value is a measure of insulation s ability to resist heat traveling through it. An r value tells you how well a type of insulation can keep heat from leaving or entering your home. Insulation r values vary based on the type thickness and density of the insulation material. The r value per inch for different types of insulation varies depending on the.