Recommended Attic Insulation R Value

Insulation levels are specified by r value.

Recommended attic insulation r value.

Recycled glass or sand that s melted and spun into fibers. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. The r value of the insulation for every inch of thickness depends on the type of insulation. Your home s r value score will guide you toward the type of insulation you need.

Where you live different climates require different insulation r values. Achieving greater r values in exterior walls. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

The table below shows what levels of insulation are cost effective for different climates and. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Insulation level are specified by r value. The higher the r value the better the thermal performance of the insulation.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Add the right kind of insulation. In particularly cold climates you might go up to r 60. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Recommended home insulation r values. 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 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. In general an attic s r value should be between r 30 and r 49. The amount of insulation recommended for your home will vary depending on a number of factors. R values of common types of insulation.

R value is a measure of insulation s ability to resist heat flow. R value is a measure of insulation s ability to resist heat traveling through it. See the department of energy s doe ranges for recommended levels of insulation below.