R-Value is a term used for categorizing insulation materials based on their thermal resistance. An R value signifies the material’s resistance to heat flow. The higher the resistance, or R-value, the better the material is at containing the transfer of heat. An R-value depends on the type, thickness, and density of the insulation.
You can’t have too much insulation, or too high of an R-value, but many older homes simply don’t have enough.
R-value Based on Location
The proper R-value for homes varies across the globe, and is dependent on respective climates. For example, homes in Southern California are required to have a minimum of R-30 in their attic. On the other end of the spectrum, homes in Northeastern United States are recommended to have a minimum of R-49 in their attic, as it gets much colder in those areas.
Batts Insulation R-Value
Generally when we look at batts, or rolled insulation, the thicker the insulation, the higher the R-value. We carry roll insulation ranging from R-11 to R-38.
Blown In Insulation R-Value
Blown in or loose fill insulation material is blown into a cavity. Blown in insulation can be made of cellulose or fiberglass, which have slightly varying R-values. The R-value of blown in insulation also depends on the volume of insulation that fills the cavity. R-values for blown-in insulation can be as low or as high as necessary. The minimum requirement for R-values can easily be exceeded with cellulose insulation.
Foam Board Insulation R-Value
Like batts insulation, R-value of a foam board, also known as rigid insulation, is relative to the thickness of the material. We carry R-20, R-24, and R-31 rigid insulation.
Thick insulation is ideal in a home. However, if your insulation is put into a space that is too small for it, then you’ve wasted your money. When insulation is compressed, it reduces the R-value of the material. The R-value of insulation in your home needs to be decided upon with consideration to the individual specifications of your home.
Simply put, the thicker the insulation, the better your indoor temperature control will be. If you have questions about installing insulation in your Los Angeles area home, feel free to call our office or fill out the contact form.