HOW TO MEASURE THERMAL INSULATION?
In most applications, the primary feature of thermal insulation material is its ability to reduce heat exchange between a surface and the environment; or between one surface and another surface. The general rule is the lower a material’s thermal conductivity, the greater its ability to insulate for given material thickness and set of conditions. If it is that simple, then why are there so many different terms, such as K-value, U-value, and R-value? Here is an overview with relatively simple definitions.