What Rating Of Insulation For Exterior Walls

What is the best r rating for insulation.

What rating of insulation for exterior walls.

Typically a higher insulation r rating means better climate control and better energy efficiency for your home. 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. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. An r value tells you how well a type of insulation can keep heat from leaving or entering your home.

The higher the r value the better the thermal performance of the insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it. Insulation r values vary based on the type thickness and density of the insulation material.

See the department of energy s doe ranges for recommended levels of insulation below. 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. The r value per inch for different types of insulation varies depending on the. Floors and crawl spaces need a lower r value than attics but they still require a higher value than walls.