Recommended Attic Insulation R Value

Add the right kind of insulation.

Recommended attic insulation r value.

A good thermal barrier along a building envelope such as high r value insulation in the walls attic and raised floors as well as multi paned glass help to reduce conduction. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. The higher the r value the better the thermal performance of the insulation. 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. Insulation level are specified by r value. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. The amount of insulation recommended for your home will vary depending on a number of factors.

The higher the r value the better the thermal performance of the insulation. R values of common types of insulation. Insulation levels are specified by r value. The higher the r value the better the thermal performance of the insulation.

Where you live different climates require different insulation r values. In particularly cold climates you might go up to r 60. 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 home insulation r values.

R value is a measure of insulation s ability to resist heat flow. In general an attic s r value should be between r 30 and r 49. You can achieve better thermal performance in your attic by adding an additional layer of insulation. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

R value is a measure of insulation s ability to resist heat traveling through it. The r value of the insulation for every inch of thickness depends on the type of insulation. Achieving greater r values in exterior walls. The table below shows what levels of insulation are cost effective for different climates and.

The transfer of heat by contact with solid objects such as the ceiling walls or floor is called conduction see figure 1. Your home s r value score will guide you toward the type of insulation you need. 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.