Recommended Attic Insulation R Value

See the department of energy s doe ranges for recommended levels of insulation below.

Recommended attic insulation r value.

The higher the r value the better the thermal performance of the 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. In particularly cold climates you might go up to r 60. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting.

The r value of the insulation for every inch of thickness depends on the type of insulation. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. R values of common types of insulation.

The higher the r value the better the thermal performance of the insulation. The amount of insulation recommended for your home will vary depending on a number of factors. R value is a measure of insulation s ability to resist heat flow. Insulation level are specified by r value.

Your home s r value score will guide you toward the type of insulation you need. The higher the r value the better the thermal performance of the insulation. 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. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Recommended home insulation r values. Recycled glass or sand that s melted and spun into fibers. In general an attic s r value should be between r 30 and r 49. Achieving greater r values in exterior walls.

The recommended r value for attic insulation in ontario is between r 50 and r 60. R value is a measure of insulation s ability to resist heat traveling through it. 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. Add the right kind of insulation.

The transfer of heat by contact with solid objects such as the ceiling walls or floor is called conduction see figure 1. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Where you live different climates require different insulation r values.